VT-Modem Manual
Contents
1. 1 518 877 5173 e support sixnet com Section 4 Electrical Connections RS232 Connections All VT MODEM Models Use the Sixnet RS232 cable VT CABLE MDM which is 6 feet in length or an equivalent cable to connect the modem s RS232 port DB9 Male cable end to the RS232 port on a SIXTRAK Gateway VersaTRAK RTU or PC DB9 Female cable end As shown in Figure 4 1 the VT CABLE MDM is a straight through serial communications cable suitable for connecting a DTE device PC Gateway or VersaTRAK to a DCE device VT MODEM For IPm and ST GT 1210 stations use a straight through Ethernet cable not supplied and the RJ45 to DB9 male adapter that came with the station Cable requirements for PLCs and other devices may be different Refer to the PLC or other device s documentation for cable pinouts Some PLC cables are documented in the Technical notes provided on the Sixnet CD that came with your modem or r SIXTRAK T E iil EZL r Port r Female Il T T J T HE T T T Figure 4 1 VT CABLE MDM Wiring VT MODEM User Manual Page 7 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com VT MODEM 1 Power Phone Line Connections DC Power Wiring Connect 10 30 VDC to the VT MODEM 1 as shown in Figure 4 2 The modem can usually be powered from the same DC source as other devices in the enclosure All the screw terminals should be tight2. 23 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Section 9 Product Support and Additional Documents To obtain support for Sixnet products call Sixnet and ask for applications engineering Our phone numbers are 1 518 877 5173 Office 1 518 877 8346 Fax e mail support sixnet com Our mailing address Sixnet Northway Ten Professional Park P O Box 767 Ushers Rd Clifton Park NY 12065 Visit our web page at http www sixnet com BUYER PROTECTION PLAN Sixnet protects your investment in Sixnet industrial modems with this unique Buyer Protection Plan Sixnet provides a liberal 18 month from time of purchase limited warranty see below on Sixnet industrial modems We also offer an extended 36 month warranty option for users with long term requirements Sixnet promises to continue to maintain each model of industrial modem we offer for sale for a minimum of five years so you can design your system only once and be assured of continued supply and high quality after sale service We further promise to plan each product improvement and new feature to be upward compatible with existing designs and installations using the latest modem wizard to configure the modem Our goal is to make each new product release better than the one it replaces by providing new features increased reliability and performance and continued support for existing feat
3. 485 Screws on VT MODEM 17T SEE Recommended DIP switch settings on th s S48 T MODEM 3 for 2 wire RS485 operation Typical 2 Wire RS48 ith biasing and termination enabled Multidrop Wiring Note The signa designations ma ary from device end station then refer to thi levi manual or how to terminate 5 E This is an end on so in LZ 3 a ppn RD RD TD TD GNI sta E eS Floor check cp TD TD RD RD R g L Data Line RIS RTS CTS _cTS 85 DB9 on SIXTRAK ateway or VersaTRAK RT RS422 485 Screws n VT MODEM 3 HHHH I on t T MODEM 3 for 4 wire RS485 operatior ith biasing and termination enabled Multidrop Wiring RS48 Typical RS422 Connectior Typical RS422 Connecti on 3rd Party Devic on 3rd Party Device Y y y Note The signal v Refer to the user manual Jesignations may var J N fo third party d from device to device on how to terminate RS42 RS422 485 Screw 22 485 Screw on VT MODEM on VT MODEM 3 RD RD TR 1D GND In Plant Floor 234 7 8 ON Closed D 1 select RS422 No III H TT Handshaking and Snes RTS Rs j CTS Tarmincte ve EG pen aie I Data Line Recommended DIP switch tings on T MODEM 3 for RS422 operation with termination enabl
4. 518 877 5173 e support sixnet com R E TO las gt d N 185 y os S Terr shan lt i x IF 485 ore aye X i ie S jias gt hs vire S4 l t tl End of tt twork VT MODEM 3 gt Kas ias gt F TD E os S Terr stick Pe K i ve TDS Ks T MODEM 3 DII paie it inc 4 DN OFF 1 4 TD 4 Y Terminatior Cle S K kaS ias gt Typical RS485 Network Bias and Termination Configuring a PC Modem to Communicate with a VT MODEM 3 in RS422 or RS485 Mode It may be necessary to change your PC s modem settings when communicating with a VT MODEM 3 running in RS422 or RS485 mode The PC modem VT MODEM 3 and the modem to modem speed should all be set to the same rate VT MODEM User Manual Page 13 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Section 5 Modem Configuration Configuring a VT MODEM for use with Sixnet I O All VT MODEM models are factory configured to use the default communication settings for SXTRAK Gateways and VersaTRAK RTUs If a VT MODEM is connected to a PLC PC or other non Sixnet device then it may be necessary to reconfigure the modem See the upcoming sections f
5. 6 AT Command Summary All VT MODEM models support the AT commands Fax Class 1 and Class 2 commands listed in this Section The VT MODEM contains a set of factory default settings which can always be restored by the user See the amp F command The modem also provides two user profiles profile 0 and profile 1 which hold settings as set and saved by the user See the amp W command The settings currently in use by the modem are generally referred to as the active configuration Notes VT MODEM 2 self dial parameters and VT MODEM 3 RS422 RS485 port parameters can only be set using the VT MODEM SETUP Wizard which is provided on the Sixnet Programmable I O for Windows CD Refer to the on line help in the VT MODEM Setup Wizard for more information The following tables only list the AT commands supported by the current modem firmware For a complete list of AT commands all valid parameters and default settings for each AT command please see the Sixnet online help system of the VT MODEM Setup Wizard Commands marked with an asterisk have different characteristics depending on the revision of VT MODEM being used Refer to the online help system of the VT MODEM Setup Wizard for the details of these differences led Re execute Last Command do not precede with AT command and do not follow with a carriage return A Go off hook and Answer A Call Write value x to last selected register Set data standard to CCITT Europe et al or
6. Additional States VT MODEM 2 only A Slow blink indicates an invalid configuration or that the Block COM Port Until Connected feature is enabled A Fast blink indicates that a self dial is in process or that the modem is in Configure Self dialing Parameters mode Note The RD and TD LEDs indicate the flow of characters in and out of the phone line interface of the VT MODEM and are not directly connected to the RS232 port all models or RS422 RS485 port VYT MODEM 3 Reconnecting Serial Cables It is important to cycle remove and then reapply DC power to a VT MODEM each time the RS232 or RS422 RS485 cable is disconnected and then reconnected The serial port of the modem may not function properly if power is not cycled Resetting the VT MODEM all models If it ever becomes necessary to completely reset the modem including both user profiles to the basic factory default settings the following command can be issued AT amp F amp WEW1 CR This command string will load the factory defaults into the active configuration amp F and then save those settings into both user profile 0 amp W and user profile 1 amp W1 Note that after the modem is reset completely to the factory defaults it will no longer be set to auto answer which is often necessary for the modem to work when connected to a remote device Use the VT MODEM Setup Wizard to adjust these settings appropriately VT MODEM User Manual Page
7. Single Line Connect Message Enable An Bn Transmit Break to Remote sets the length of break signal sent to remote modem in non error correction mode MS VDR GCI Country Select A8E V 8 and V 8bis Operation Controls Cn Enable Disable Data Compression MNP5 V42bis or both Mn Enable Cellular Power Level Adjust only included for compatibility and performs no function amp Jn amp Kn amp Rn amp Sn amp Tn amp V amp V1 amp Wn amp Xn amp Yn E U Mn Initial Cellular Power Level Setting only included for compatibility and performs no function E Compromise Equalizer Enable only included for compatibility and performs no function Display Blacklisted Numbers Display Delayed Numbers MNP Extended Services Last Call Status Report Answering in Voice Audio Mode Dial command in Voice Audio Mode Hang up in Voice Audio Mode Ss D Kn UD Voice Commands A H Z BDR CID CLS MDL MEFR REV TL Audio output transmit level VBQ Query buffer size VBS Bits per sample ADPCM or PCM VBT Beep tone timer VCI Identify compression method ADPCM VLS Voice line select ADPCM or PCM VT MODEM User Manual Page 19 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Enable timing mark placement So a a ae Synchronous Access Mode Ls anean T OOOO Carrier loss time
8. Sixnet Sixnet further warrants that any software supplied as part of a product sale except obsolete products will be free from non conformances with Sixnet published specifications for a period of 90 days from the time of delivery While Sixnet endeavors to improve the features and performance of software associated with its products no effort on the part of Sixnet to investigate improve or modify Sixnet software at the request of a customer will obligate Sixnet in any way This limited warranty does not cover losses or damages which occur in shipment to or from Buyer or due to improper installation maintenance misuse neglect or any cause other than ordinary commercial or industrial applications In particular Sixnet makes no warranties whatsoever with respect to implied warranties of merchantability or fitness for any particular purpose All such warranties are hereby expressly disclaimed No oral or written information or advice given by Sixnet or Sixnet s representative shall create a warranty or in any way increase the scope of this warranty This limited warranty is in lieu of all other warranties whether oral or written expressed or implied Sixnet s liability shall not exceed the price of the individual units which are the basis of the claim In no event shall Sixnet be liable for any loss of profits loss of use of facilities or equipment or other indirect incidental or consequential damages These products must not be used to repl
9. computer to go on line with a MicroLogix via a telephone modem connection TN 641 GE Versamax Micro PLC This document explains the procedure of dialing and establishing a communications between a local PC running VersaPRO software and a remotely located GE Fanuc VersaMAX Micro Controller via a pair of Sixnet Industrial Modems TN 642 GE Fanuc 90 30 PLC This document explains the procedure of dialing and establishing a communications between a local PC running VersaPRO software and a remotely located GE Fanuc 90 30 Programmable Controller via a pair of Sixnet Industrial Modems TN 640 PLCDirect DL250 PLC This Technical Note defines the procedure for dialing and establishing communications between a PC running Directsoft32 software and a DL250 PLC via Sixnet Industrial modems TN 647 VT MODEM Rev 3 changes some AT commands This technical note describes differences between the AT commands supported in current and previous revisions of the VT MODEM 1 2 and 3 and SiteTRAK 1T This Technical Note is intended to aid existing customers in identifying and dealing with potential issues in converting to the newer revision products FCC Requirements for Consumer Products VT MODEM User Manual Page 27 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com The Federal Communications Commission FCC has established rules which permit this device to be directly
10. connected while the signal is ON When the signal goes false the modem will terminate the connection or the call in progress The To PLC on line output terminal will go ON ON user supplied VDC input when a modem to modem connection has been established and the proper Acknowledge Message has been received To Phone Lit To Other Moder r a Telephor ELF DIALING MODEM o T MODEM IXINET Made C usa 5 l rom PL Di tput fr Discr Input Pl Indica ni K Figure 4 3 VT MODEM 2 WIRING VT MODEM User Manual Page 9 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com VT MODEM 3 Power Phone Line RS422 RS485 Connections DC Power Wiring Connect 10 52 VDC to the VT MODEM 3 as shown in Figure 4 4 The modem can usually be powered from the same source as other devices in the enclosure All the screw terminals should be tightened to a maximum of 3 48 in lbs Telephone Cable Connect an analog phone line to the RJ 11 jack as appropriate RS422 RS485 Cabling and DIP Switch Settings Refer to Figure 4 4 for typical wiring configurations Fabricate a c
11. it contains all factory defaults with the exception that it is set to auto answer register SO 1 and ignore DTR amp D0 The User profile 1 contains all normal factory defaults as listed in Section 6 ACTIVE PROFILE B1 E1 L1 M1 NO QO T V1 WO X4 YO amp C1 amp DO amp G0 amp JO amp K3 amp Q5 amp R1 amp SO amp T5 amp X0 amp YO S00 001 S01 000 S02 043 S03 013 S04 010 S05 008 S06 002 S07 050 S08 002 S09 006 10 014 11 085 12 050 18 000 25 005 S26 001 36 007 S38 020 S46 138 S48 007 S95 000 STORED PROFILE 0 B1 E1 L1 M1 NO QO T V1 WO X4 YO amp C1 amp DO amp G0 amp JO amp K3 amp Q5 amp R1 amp SO amp T5 amp X0 S00 001 S02 043 S06 002 S07 050 S08 002 S09 006 S10 014 11 085 12 050 S18 000 S36 007 S40 104 41 195 46 138 S95 000 STORED PROFILE 1 B1 E1 L1 M1 NO QO T V1 WO X4 YO amp C1 amp D2 amp G0 amp JO amp K3 amp Q5 amp R1 amp SO amp T5 amp X0 S00 000 S02 043 S06 002 S07 050 S08 002 S09 006 S10 014 S11 085 12 050 S18 000 FACTORY DEFAULTS B1 E1 L1 M1 NO QO T V1 WO X4 YO amp C1 amp D2 amp G0 amp JO amp K3 amp Q5 amp R1 amp SO amp T5 amp X0 amp YO S00 000 S01 000 S02 043 S03 013 S04 010 S05 008 S06 002 S07 050 S08 002 S09 006 10 014 11 085 12 050 18 000 25 005 S26 001 S36 007 S38 020 S46 138 S48 007 S95 000 VT MODEM User Manual Page 17 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Section
12. modes Signal rate RS422 RS485 distance CD Carrier detect The modem has detected a carrier on the phone line a remote modem has been detected TR Data Terminal Ready The PC or Gateway VersaTRAK has established a connection to the modem and is ready RD Receive Data TD Transmit Data Power Input Power 10 30 VDC VT MODEM 1 2 10 52 VDC VT MODEM 3 Input Current Rev 1 and Rev2 see 65mA 24VDC and 26mA in Low Power mode of 1 typical section 1 97mA 24VDC and 64mA in Low Power mode of 2 typical 68mA 24VDC and 28mA in Low Power mode of 3 typical Input Current Rev 3 50mA 24VDC and 30mA in Low Power mode for 1 and 2 typical Bas Soma 24Vbcand3smAinbow Power made for ypial Certification FCC Part 15 and FCC Part 68 UL 508 CSA C22 2 14 ACA TS 001 1997 ACA TS 002 1997 AS NZS3260 1993 AS NZS3548 1995 CTR21 98 482 EC EN55022 IEC 950 1991 Humidity 5 to 95 RH non condensing Mounting DIN rail or panel mount Dimensions W x 4 75L x 1 35H inches 8 2 W x 12 1 L x 3 4H cm PLC Discrete I O Interface VT MODEM 2 only Trigger Input From PLC Connects to PLC output Starts auto dialing upon transition from OFF to ON Modem ee DE will stay connected while input is ON 9 to 30 VDC 6 5 mA at 24 VDC 5 VDC Output is ON as long as a connection exists carrier detect Sourcing switches supply power 100 mA VT MODEM User Manual Page 5 of 30 Last Revised 17 Aug 09 Sixnet Techno
13. ASCII message Flexible features allow this modem to perform retries or even connect to alternate number until it has verified that a connection has been established The call will terminate when either e The computer completes its polling and hangs up e The modem discrete input is turned off e A telephone line problem disrupts the call The VT MODEM enables field installed equipment to establish a telephone link based upon a simple switch closure This self dialing modem adds dial upon alarm intelligence to any remote site This enhanced modem is ideal for DIALING UPON ALARM FROM ANY PLC This modem establishes a connection based upon a coil output from any PLC Once a connection has been established the PLC s system programming port is connected to the computer at the other end of the phone link and may be polled by that computer as if the computer had initiated the call When the modem connects to the central computer it identifies itself so the computer can run the appropriate I O driver and interrogate the PLC SENDING A MESSAGE BASED UPON A SWITCH CONTACT Locations that do not have PLCs or other intelligence can originate calls to alert you to low tank levels over temperature conditions or other alarms Simply connect the appropriate alarm contact to the modem s input The modem will dial the pre stored phone number and deliver the ID message to the computer at the receiving end VT MODEM 3 RS485 Port The VT MOD
14. Bell Mode U S Canada for connections at 300 or Report the value of last selected register 1200 bps Carrier Control parameter 1 only Dial originate a call typical usage ATDT5551212 to tone dial number ATDS n to dial nth stored numbe T Speaker Volume not available Speaker Control not available AJ A AT Bn Cn Dn E Fn Hn In S Ln Mn Nn Automode Enable enabled allows connection at highest possible modem speed disabled fixes L P Set Pulse Dial Delan i Cn Dn Long space disconnect Perform Soft Reset and Restore stored user configuration profile 0 or 1 amp RLSD DCD Option set DCD signal to indicate presence of carrier or forces DCD signal on at all times amp amp Dn O f DTR Option set how modem interprets the DTR signal VT MODEM User Manual Page 18 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com amp Fn Restore factory configuration profile 0 or 1 amp Gn Select guard tone Telephone jack control Set Flow Control amp Mn amp Qn amp Zn x Report line signallevel o PL Report line signal level PQ Report line signal quality 1 Plug and Play Serial Number 8 Plug amp Play Vendor ID Prod No Kn Break Control sets how the modem responds to a break signal n N Sets the Operating Mode of the modem direct normal reliable or auto reliable Vn
15. EM 3 Industrial Modem Plus has an RS422 RS485 port that can function in place of its RS232 port The RS422 RS485 port supports RS422 and RS485 full duplex and two wire RS485 half duplex communication to compatible devices The VT MODEM 3 is user configurable to communicate through either the RS232 port VT MODEM 1 mode or through the RS422 RS485 port Only one port can be used at a time VT MODEM SETUP WIZARD A modem setup utility is provided on the Sixnet CD to help you quickly configure any Sixnet Industrial Modem In most applications no knowledge of modem AT commands or S register contents is necessary Pre configured profiles for common situations are provided for your convenience An extensive online help file is provided with this utility VT MODEM User Manual Page 4 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Section 2 Performance Specifications Max Data Rate Compatibility V 34 V 32bis V 32 V 22bis V 22A B V 23 V 21 Bell212A amp 103 Data Compression Error Correction Max Fax Modem Rate Fax Modem Compatibility Ringer Equivalent Line Jack Phone Jack Max RS232 Rate 115 2 kbps Kilobaud RS232 Signal Support TXD RXD CTS RTS DCD DTR DSR RI GND RS232 Connector DB9 female RS232 Command Set All standard AT and S register commands including Class 1 Class 2 Fax commands and Voice commands RS422 mode RS485
16. EM User Manual i onine ifno datais sentor received ___ O General Bit Mapped Options S36 LAPM Failure Control used when register S452125 Delay before forced hang up time delay between the receipt of S N e A e ante al dass open S39 Flow control bit mapped options S40 General bit mapped options _ sol Call Failure Reason Code when the No Carrier result code is issued the reason for the failure is written to this register S91 S36 S38 S39 S40 46 48 82 86 92 95 Page 22 of 30 0 0 255 255 0 15 0 15 0 255 194 C2h i o O H cael o H 104 68h _ 195 C3h _ ee eee pee s8 S T ST 128 40h fe 0o __ Bo Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Section 8 Maintenance Information Troubleshooting Tips VT MODEM Default LED Indications All VT MODEM models have the following LEDs Default Indication This LED will come ON once a phone line connection has been established and will remain on for as long as the connection is maintained Data Terminal Ready This LED should be ON at all times This LED will come ON whenever characters are received through the phone line This LED will come ON whenever the modem sends characters out the phone line Power LED Normal Indication All models This LED will be ON when power is applied to the modem
17. Sixn e t USER MANUAL VT MODEM Industrial Modems Installation amp Maintenance ammm ae Contents at a Glance Section 1 Overview 2 Section 2 Performance Specifications 2 Section 3 VT MODEM Mounting 6 Section 4 Electrical Connections 7 Section 5 Modem Configuration 14 Section 6 AT Command Summary 18 Section 7 S Register Summary 21 Section 8 Maintenance Information 23 Section 9 Product Support amp Other Documents 24 This manual applies to the following products General purpose industrial modem VT MODEM 1 Self dialing industrial modem VT MODEM 2 RS485 industrial modem VT MODENM 3 VT MODEM User Manual Page 1 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 lt support sixnet com Section 1 Overview The Sixnet VT MODEMs are rugged industrial telephone modems that have been designed for operation in electrical enclosures installed in harsh environments Each VT MODEM supports all standard Hayes AT commands Fax Class 1 and Class 2 commands and S registers and therefore can be set up as an external modem on any PC The VT MODEMs are compatible with any telecommunications or dial up networking software A VT MODEM allows easy access to PLCs Sixnet I O and other devices via dial in telephone connections The modem may be DIN rail or panel mounted for convenient and easy installation adjacent to other DIN rail components inside of new or existing
18. able to connect the modem s RS422 RS4835 port to the field device s The VT MODEM 3 has DIP switches These switches establish the mode of operation for the RS422 RS485 port Set these switches to match the type of wiring connected to the RS422 RS485 port Refer to Figure 4 5 on the next page It is not necessary to cycle power to the modem if DIP switch changes are made T MODEM 3 SIXNE Figure 4 4 Typical RS422 RS485 Wiring VT MODEM User Manual Page 10 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com RS422 485 DB9 on SIXTRAK Gateway or rsaTRAK LT RD RD TD TD GND If this was an end 3 1 tation then in Plant Floor check the box to Terminate Receive Data Line U GI 185 485 48 a gt NO US gt ter RS485 2 Wire Screws on RemoteTRAK 2 Wire Screw If this was an end station ther n EtherTRAK connect 26 to 27 to terminate This is an end statior so connect 22 and 23 sup TD TD RD RI E E RS422
19. ace proper safety interlocking No software based device or other solid state device should ever be designed to be responsible for the maintenance of consequential equipment or personnel safety In particular Sixnet disclaims any responsibility for damages either direct or consequential that result from the use of this equipment in any application VT MODEM User Manual Page 25 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Service Information We sincerely hope that you never experience a problem with any Sixnet product If you do need service call Sixnet at 518 877 5173 and ask for Applications Engineering A trained specialist will help you to quickly determine the source of the problem Many problems are easily resolved with a single phone call If it is necessary to return a unit to us an RMA Return Material Authorization number will be given to you Sixnet tracks the flow of returned material with our RMA system to ensure speedy service You must include this RMA number on the outside of the box so that your return can be processed immediately The applications engineer you are speaking with will fill out an RMA request for you If the unit has a serial number we will not need detailed financial information Otherwise be sure to have your original purchase order number and date purchased available We suggest that you give us a repair purc
20. ates to 33 600 bps the selections in Windows are limited to 28800 bps 4 To verify that the modem has been installed select Start gt Settings gt Control Panel and then double click the Modems icon The modem should be listed as Standard 28800 bps Modem Here is an alternate modem installation procedure use if the PC is already powered up 1 Connect the DC power communications cable VT CABLE MDM or equivalent and telephone line as described above 2 Select Start gt Settings gt Control Panel and then double click the Modems icon 3 The Install New Modem dialog box will appear Do not select the Don t detect my modem I will select it from a list Instead click Next and allow Windows to search the com ports and detect the modem 4 Windows should find a modem called Standard Modem Click Next and Windows will complete installation of the Standard Modem Alternately click Change and select Standard Modem Types from the Manufacturers list and Standard 28800 bps Modem from the Models list VT MODEM User Manual Page 14 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com 5 To verify that the modem has been installed select Start gt Settings gt Control Panel and then double click the Modems icon The modem should be listed as either a Standard Modem or a Standard 28800 bps Modem depending on the ste
21. authorized agents Sixnet Northway Ten Professional Park PO Box 767 Ushers Road Clifton Park NY 12065 518 877 5173 VT MODEM User Manual Page 28 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Industry Canada Requirements The VT MODEM meets the procedural and specification requirements for certification under the Terminal Attachment Program CERTIFICATION NO 2991 8926 A ISSUED TO Sixnet TYPE OF EQUIPMENT MULTI MEDIA DEVICE TRADE NAME AND MODEL VT MODEM 1 VT MODEM 2 VT MODEM 3 METHOD OF CONNECTION CALIA RINGER EQUIVALENCE NO 0 3 CERTIFIED TO SPECIFICATION CS03 ISSUE 8 NETWORK INTERFACE LS VT MODEM User Manual Page 29 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Regulatory Notices Any European Country The VT MODEM 1 2 and 3 EC are in conformity with relevant regulatory standards following the provisions of European Council Directives 73 23 EEC Low Voltage Directive and 89 336 EEC amended by 92 3 1 EEC EMC Directive The VT MODEM 1 2 and 3 EC have been approved in accordance with Council Decision 98 482 EC for pan European single terminal connection to the public switched telephone network PSTN However due to differences between the individual PSTNs provided in different countries the approval does not o
22. connected to the telephone network Standardized jacks are used for these connections This equipment should not be used on party lines or coin lines If this device is malfunctioning it may also be causing harm to the telephone network this device should be disconnected until the source of the problem can be determined and until repair has been made If this is not done the telephone company may temporarily disconnect service The telephone company may make changes in its technical operations and procedures if such changes affect the compatibility or use of this device the telephone company is required to give adequate notice of the changes If the telephone company requests information on what equipment is connected to their lines inform them of A The telephone number that it is connected to B The Ringer Equivalence Number 0 3 C The USOC jack required RJ11 and D The FCC Registration Number 34579 MD E Items b and d are indicated on the label The ringer equivalence number REN is used to determine how many devices can be connected to your telephone line In most areas the sum of the RENs of all devices on any one line should not exceed five 5 0 If too many devices are attached they may not ring properly In the event of equipment malfunction all repairs should be performed by our Company or authorized agent It is the responsibility of users requiring service to report the need for service to our company or one of our
23. e models list select Standard 28800 bps Modem then click Next 4 Select the COM Port on your computer the modem will be connected to 5 To verify that the modem has been installed select Start gt Settings gt Control Panel and then double click the Phone and Modem Options icon Go to the Modems tab The modem should be listed as a Standard 28800 bps Modem connected to COM port you selected Once the VT MODEM modem has been added to your Windows 95 98 NT or XP system it is ready for use If you are using Sixnet I O you can use the Sixnet Sixdial software to dial out and establish a connection with your Sixnet I O The Sixdial utility allows other Sixnet programs to perform operations such as data transfers hardware configuration and diagnostics and ISaGRAF programming Refer to the on line help in the Sixdial utility for more information on these software tools If you are using a PLC or other device refer to the documentation for that device as necessary To Remove a Modem If it ever becomes necessary to re install the modem for any reason select Start gt Settings gt Control Panel and then double click the System icon Next click the Device Manager tab The list should display a Modems icon Double click the Modems icon Highlight the modem to be removed and then click the Remove button To reinstall the modem follow the installation steps as previously described VT MODEM User Manual Page 15 of 30 Last Re
24. ed and no biasing Biasing does not apply to RS422 RS422 4 Typical RS422 S TD TD RD RL ND T0 TD N 2 485 Screws n VT MODEM 3 On on One Wiring Figure 4 5 Detailed RS422 RS485 Wiring and DIP Switch Settings VT MODEM User Manual Page 11 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com VT MODEM 3 DIP Switch Summary 2 wire RS485 Cabling Receive Bias Enabled RS485 4 wire Cabling Transmit Bias Enabled RS485 2 and 4 wire Cabling 7 ON 8 OFF 2 wire Termination Enabled 7 ON 8 ON 4 wire Termination Enabled 7 ON 8 OFF 2 wire Termination Enabled 2 and 4 wire Termination Disabled Transmit Bias Disabled RS485 2 and 4 wire Cabling Receive Bias Disabled RS485 4 wire Cabling RS422 or 4 wire RS485 Cabling RS422 RS485 Network Termination The VT MODEM 3 has built in termination components for the Receive Data and Transmit Data signals Termination of these signals is enabled by setting DIP switches on the VT MODEM 3 Termination components are often built into other RS422 RS485 devices and are typically enabled by setting a jumper or DIP switch on the appropriate device Here are some guidelines for the use of termination e Terminations should be enabled at both ends of an RS422 communication cable e Terminations should be enabled at both end stations on a
25. enclosures Most Windows software can communicate through a VT MODEM to remote devices to perform file transfers diagnostics program debugging and many other operations All Sixnet Industrial Modems allow communication to remote sites for data retrieval or diagnostics Note All VT MODEM models communicate over analog phone lines only Discrete Input to PL Indicat nnectior The Sixnet PLC Self Dialing Modem VT MODEM 2 has all the features of the Sixnet Industrial Modem VT MODEM 1 plus the ability to dial out based on an alarm contact or PLC discrete output VT MODEM User Manual Page 2 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 lt support sixnet com Identifying the modem you have This section will show how to identify what revision of modem you have 1 The Sixnet VT MODEM Wizard will detect the version of the modem you have Open the wizard and detect the modem you are connected to by selecting the COM port your modem is connected to and clicking the red Detect Modem button on most configuration screens The firmware v
26. ened to a maximum of 3 48 in lbs Telephone Cable Connect analog phone lines to the RJ 11 jacks as appropriate One RJ 11 jack is provided to connect directly to a telephone optional and the second RJ 11 jack functions as the connection to the telephone network aD 8 OG TD INDUSTRIAL MODE T MODEM IXNET wade in usa Figure 4 2 VT MODEM 1 WIRING VT MODEM User Manual Page 8 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com VT MODEM 2 Power Phone Line Self Dial Connections DC Power Wiring Connect 10 30 VDC to the VT MODEM as shown in Figure 4 3 The modem can usually be powered from the same source as other devices in the enclosure All the screw terminals should be tightened to a maximum of 3 48 in lbs Telephone Cable Connect analog phone lines to the RJ11 jacks as appropriate One RJ 11 jack is provided to connect directly to a telephone optional and the second RJ 11 jack functions as the connection to the telephone network PLC Self Dial I O Connections Connect a 10 30VDC signal to the From PLC trigger input terminal An OFF to ON transition of this signal starts the auto dialing sequence The modem will call and remain
27. ersion of your modem is indicated as Rev 1 Rev 2 or Rev 3 otherwise the difference is seamless to the typical Wizard user 2 On the back of the modem there is a white sticker called the back label that indicates among other things the revision number Rev and modem models Please see the tables below to see how to interpret this number 3 You can also detect the modem type using HyperTerminal To query the firmware version enter ati3 lt enter gt Please see the tables below for information on how to interpret this firmware rev number VT MODEM 1 VT MODEM Wizard Rev 1 Rev 2 Rev 3 Back Label 1 00 1 08 1 10 2 02 1 09 3 00 and above HyperTerminal ati3 V2 100 V34_2M_DLS P2109 V90 CX81802 V34 VT MODEM 2 VT MODEM Wizard Rev 1 Rev 2 Rev 3 Back Label 1 00 1 04 1 06 1 08 1 04 1 05 2 00 HyperTerminal ati3 f V2 100 V34_2M_DLS P2109 V90 CX81802 V34 VT MODEM 3 VT MODEM Wizard Rev 1 Rev 2 Rev 3 Back Label 1 00 1 02 1 04 1 06 1 02 1 03 2 00 HyperTerminal ati3 V2 100 V34_2M_DLS P2109 V90 CX81802 V34 VT MODEM User Manual Page 3 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com VT MODEM 2 Self Dialing Feature The Self Dialing Modem is triggered by a switch closure or PLC output signal It dials a pre stored phone number and optionally identifies itself by way of a pre stored
28. f itself give an unconditional assurance of successful operation on every PSTN network termination point In the event of problems you should contact Sixnet in the first instance Australia The VT MODEM 1 2 and 3 EC shall be connected to the Telecommunication Network through a line cord which meets the requirements of Australian Communications Authority ACA Technical Standard TS008 An Australian Approved Power Supply or AC Adapter shall be utilized with the product AS NZS3548 1995 WARNING This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate action Germany Diese VT MODEM 1 2 and 3 EC als Endeinrichtung vorgesehen und muss an ein TAE mit F Kodierung angeschlossen werden This VT MODEM 1 2 and 3 EC is a terminal equipment which must be connected to the PSTN using an F coded connector plug TEC950 1991 The Industrial Modem shall be connected to Telecommunications Network through a line cord approved by the necessary authorities of the country The Industrial Modem shall be utilized with a power supply approved by the necessary authorities of the country United Kingdom The VT MODEM is intended for direct connection to the analogue Public Switched Telecommunications Network and is approved for use within the United Kingdom with following features Modem facility Autocalling facility Autoanswering facilit
29. hase order number in case the repair is not covered under our warranty You will not be billed if the repair is covered under warranty Please supply us with as many details about the problem as you can The information you supply will be written on the RMA form and supplied to the repair department before your unit arrives This helps us to provide you with the best service in the fastest manner Normally repairs are completed in two days Sometimes difficult problems take a little longer to solve If you need a quicker turnaround ship the unit to us by airfreight We give priority service to equipment that arrives by overnight delivery Many repairs received by mid morning typical overnight delivery can be finished the same day and returned immediately Sixnet pays the return freight for material repaired under warranty The method of outgoing shipment will be equivalent to the way you shipped the unit to us If you send the unit by air we will return it by air We apologize for any inconvenience that the need for repair may cause you We hope that our rapid service meets your needs If you have any suggestions to help us improve our service please give us a call We appreciate your ideas and will respond to them For Your Convenience Please fill in the following and keep this manual with your Sixnet system for future reference P O Date Purchased Purchased From VT MODEM User Manual Page 26 of 30 Last Revised 17 A
30. logy Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Section 3 VT MODEM Mounting The VT MODEM snaps onto standard DIN rail DIN EN 50022 or is mounted to a flat panel using 6 or 8 screws See Figure 3 1 The modem can be installed in any orientation directly adjacent to other DIN rail components or in any convenient location within the enclosure The modem should be installed within 6 feet of the device it will be connected to Je 4 i OT a6 INDUSTRIAL MODEM we T MODEM SIXNET Mode in usa EN 50022 11 35cm SIDE VIE Figure 3 1 VT MODEM DIMENSIONS ALL MODELS For DIN rail mounting hook the top rear of the modem onto the top edge of the DIN rail Using a small flat head screwdriver pull down on the spring loaded tab on the bottom of the modem and push the modem back against the rail Reverse these steps to remove the modem See Figure 3 2 below DIN Rail EN50022 s wo Insert screwdriver ind pull down to release spring loaded tat Swing modem against rail and release Figure 3 2 DIN RAIL MOUNTING VT MODEM User Manual Page 6 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e
31. n RS485 network No more than two stations should be terminated on an RS485 network Bias Resistors RS485 networks only On an RS485 two wire network there should be one pair of bias resistors acting upon the transmit receive wires On an RS485 four wire network there should be two pairs of bias resistors one pair on the receive wires and one pair on the transmit wires Bias resistors force the receive or transmit receive wires to a known non floating state when none of the RS485 devices are transmitting data If bias resistors are not present some RS485 devices may experience communication errors due to noise on the floating wires Bias resistors do not apply to RS422 wiring because the wires are always driven by the two RS422 devices The wires are not permitted to float The location of the bias resistors is not critical Typically they are installed at the master RS485 device Bias resistors are provided in the VT MODEM 3 and are enabled through DIP switch settings There should be only one pair of these resistors connected to an RS485 two wire network and only two pairs of these resistors connected to an RS485 four wire network Refer to Figure 4 5 for recommended VT MODEM 3 DIP switch settings Do not enable the VT MODEM 3 bias resistors if there are bias resistors enabled on one of the other RS485 devices VT MODEM User Manual Page 12 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1
32. or further details AT Command String at Powerup Upon powerup a SIXTRAK gateway or Versa TR AK RTU can send a command string to a VT MODEM This capability can be used to assure that the modem is set to a particular mode of operation such as auto answer mode Refer to the Set Modem String topic in the Plant Floor program s online help for information on this capability Any standard AT command can be sent by the gateway or RTU Configuring a VT MODEM as an External Modem on a PC The VT MODEM can be connected directly to a PC The modem will need to be installed in Windows prior to use Here are instructions to install the modem in both Windows 95 98 and Windows NT Modem Installation in Windows 95 98 Plug and Play method recommended 1 With the PC off connect DC power and the telephone line to the VT MODEM Connect a communications cable VT CABLE MDM or equivalent between the VT MODEM and the PC Turn on the PC During the boot up process Windows should detect the modem and display the New Hardware Found dialog box 2 Make the selection Select from a list of alternative drivers 3 The Select Device dialog will be displayed In the column labeled Manufacturers select Standard Modem Types In the column labeled Models select Standard 28800 bps Modem Click OK Windows will then complete the boot up process The standard Windows driver is used for the VT Modem Although the VT Modem supports baud r
33. out VT MODEM User Manual Page 20 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Section 7 S Register Summar Note The following tables only summarize the supported S registers A description for each S register may be found in the online help system of the VT MODEM Setup Wizard Register Funetian Range Units Default SO Number of rings required before modem auto answers 0 255 rings 0 S1 Ring counter increments each time a ring is detected 0 255 _ rings 0 S2 S5 Backspace character T0255 asaj 8 S6 Maximum time to wait after going off hook to dial when blind 2 255 sec 2 dialing Maximum time to wait for carrier after dialing before hanging 1 255 up a eee EE present for modem to consider it a valid connection S10 Carrier loss disconnect time carrier must be absent for this time 1 255 0 1s 14 E T Escape prompt delay this delay must be present after receipt of the last character of the escape sequence before receipt of any other character for the escape sequence to be recognized a Re a ee eee General bit mapped options indicates the status of the following ae ae ia options echo quiet mode results codes tone pulse and originate answer ZSS Remed a ee i Si Test mode bit mapped options amp T 0 fe lhe 2 Reserved e 2 es a l a S20 AutoSync HDLC Addr or BSC Sync Cha
34. ps followed above 6 Upon re booting the machine Windows may still find the VT MODEM as new hardware If this happens select Do not install a driver Windows will not prompt again Modem Installation in Windows NT 1 Select Start gt Settings gt Control Panel and then double click the Modems icon 2 The Install New Modem dialog box will appear Do not select the Don t detect my modem I will select it from a list Instead click Next and allow Windows to search the com ports and detect the modem 3 Windows should find a modem called Standard Modem Click Next and Windows will complete installation of the Standard Modem Alternately click Change and select Standard Modem Types from the Manufacturers list and Standard 28800 bps Modem from the Models list 4 To verify that the modem has been installed select Start gt Settings gt Control Panel and then double click the Modems icon The modem should be listed as either a Standard Modem or a Standard 28800 bps Modem depending on the steps followed above Modem Installation in Windows XP 1 Select Start gt Settings gt Control Panel and then double click the Phone and Modems Options icon 2 Go to the Modems tab and click the Add button to install a new modem The Install New Modem wizard will appear Select the Don t detect my modem I will select it from a list 3 Highlight the manufacturers list Standard Modem Types From th
35. r 255 0 S21 V24 general bit mapped options indicates the status of the 52 34h following options CTS amp Rn DTR amp Dn DCD amp Cn DSR amp Sn long space disconnect Yn Speaker results bit mapped options indicates the status of the 117 75h following options speaker control Ln volume Mn results codes Xn 823 General Bit Mapped Options 58Gb Sleep inactivity timer sets the length of time that the modem will 0 255 s operate in normal mode without activity on the phone or RS232 port before entering sleep mode Ea s26 Delay to DTR CT108 off sets time modem ignores DTR signal 0 255 s 0 01s before taking action specified by amp Dn RTS to CTS CT105 to CT106 delay if amp RO is set 0 255 S2 General Bit Mapped Options for sync async 73 49h control amp Mn amp Qn leased line control amp Ln clock select amp Xn Bell CCITT mode Bn General Bit Mapped Options indicates options for pulse ioe ce cae dialing amp Pn MNP Link negotiation speed Hn S29 Flash Modifier Time sets the length of time the modem will go 0 255 10 ms 70 on hook if the flash dial modifier is encountered in the dial string S30 Inactivity timer sets the length of time the modem will remain 0 255 10s o0 VT MODEM User Manual Page 21 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com S22 S24 S25 S26 7 S28 S30 VT MOD
36. speed can be 33 6K bits per second or higher using data compression Note that this phone line speed is independent of the DTE serial port speed though some older modems require that the phone line speed and DTE speed be the same In practice the quality of any phone line changes continually and frequent data errors may occur The probability of errors usually increases as the phone line speed increases Therefore it is often desirable to restrict the phone line speed to a rate that will provide good performance and yield reliable data It is also commonplace to restrict the phone line speed to maintain compatibility when replacing an older modem with the VT MODEM By default the VT MODEM will permit any phone line speed up to 115 2 kbps when data compression is enabled If you experience intermittent or unreliable communication try setting the modem to modem speed in the VT MODEM Setup Wizard to a lower value to restrict the phone line speed Remember to load the new configuration to the modem VT MODEM Profile Summary Here is a summary of the active configuration user profile 0 user profile 1 and the factory defaults when the modem is shipped Each time the modem is powered up first the factory default settings as listed in Section 6 are loaded into the active configuration Next the designated user stored profile is loaded into the active configuration User profile 0 is loaded by default see the amp Y command in Section 6 and
37. te detection feature that lets the modem recognize commands through its serial port at any supported baud rate However if the modem is connected to a device that does not send commands or data unless spoken to such as most PLCs then the modem will pass information from the phone line to its serial port at the last auto detected baud rate This is typically the baud rate used by the VT MODEM setup Wizard when configuring the modem The VT MODEM is defaulted at the factory for 9600 baud To change this setting connect the modem to a PC Start the VT MODEM setup Wizard and choose the baud rate that matches the PLC s baud rate Then choose the appropriate settings and write the configuration to the modem Exit the VT MODEM setup Wizard and reconnect the modem to the PLC Be sure to cycle power to the modem Call the modem and verify that the PLC is responding to commands VT MODEM User Manual Page 16 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 lt support sixnet com Limiting the Phone Line Connection Speed for Reliability Typically when a modem to modem connection is established the two modems negotiate and connect at the fastest possible phone line speed that is within the capability of both modems The quality of the phone line connection during the negotiation will be taken into account If both modems are of a modern design such as the VT MODEM the phone line
38. ug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Additional Documents The Sixnet Programmable I O for Windows CD has the following documents which provide additional information pertaining to the VT MODEM and its usage VT MODEM Help File This online help system is accessed on the CD by selecting Manuals and Documents gt User Manuals gt Modem Help File The following Technical Notes in addition to others are accessible on the CD by selecting Manuals and Documents gt Technical Notes The VT MODEM Wizard configurations 6ms mentioned in these Technical notes are provided in the sixtrak directory of the CD TN 606 VT MODEM Replaces an Existing 1200 2400 or 9600 Baud Modem This document describes the settings necessary to configure the VT MODEM to functionally replace an existing 1200 2400 or 9600 baud modem TN 620 Allen Bradley SLC 5 03 This technical note provides instructional tips for interfacing the Sixnet Industrial Telephone Modem with the Rockwell Software RSLinks 2 0 and RSLogics 500 and Allen Bradley SLC500 Processors TN 623 Allen Bradley MicroLogix 1000 and 1500 PLC The information in this document explains the procedure for interfacing a Sixnet Industrial Telephone Modem with an AB MicroLogix 1500 controller and a computer running the Rockwell RSLogix 500 programming software and the RSLINX communication software This setup will allow a remote
39. ures Sixnet protects your investment even further with a liberal five year trade in policy You may exchange standard Sixnet products for upgraded versions of the same or upward compatible products to take advantage of new features and performance improvements at any time for five years A liberal prorated exchange allowance will be given for your existing equipment You may contact Sixnet directly to trade up on any industrial modem product SIXNET INDUSTRIAL MODEM EXCHANGE ALLOWANCE Time Since the Original Purchase Trade In Allowance 0 to 1 Year 50 1 to 2 Years 40 2 to 3 Years 30 3 to 4 Years 20 Over 4 Years 10 VT MODEM User Manual Page 24 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Sixnet Statement of Limited Warranty Sixnet LLC manufacturer of Sixnet Industrial Modems warrants to Buyer that products except software manufactured by Sixnet will be free from defects in material and workmanship Sixnet obligation under this warranty will be limited to repairing or replacing at Sixnet option the defective parts within one year of the date of installation or within 18 months of the date of shipment from the point of manufacture whichever is sooner Products may be returned by Buyer only after permission has been obtained from Sixnet Buyer will prepay all freight charges to return any products to the repair facility designated by
40. vised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 e support sixnet com Configuring a VT MODEM Using the VT MODEM Setup Wizard It is highly recommended that the Sixnet VT MODEM Setup Wizard be used for VT MODEM configuration Simply check the appropriate boxes choose the appropriate communication settings from the dropdown lists and load the configuration into the VT MODEM This utility does not require user knowledge of AT commands and S registers Refer to the online help system in the VT MODEM Setup Wizard for instructions and application notes Note The VT MODEM Setup Wizard must be used to configure the self dial parameters of the VT MODEM and the RS422 RS485 port parameters of the VT MODEM 3 SIXNET VT MODEM Wizard x Modem Parameters Please specify the required modem parameters ee Basic Modem Parameters Phone Number 1 777 234 C7 Enable Auto Answer on fi Rings Ignore DTR assume ON D Ignore Carrier Detect force ON m Advanced Modem Parameters Disable Command Echo Disable Error Correction Flew Conto None Disable Data Compression Save Power After 5 Seconds m Modem to Modem Speed Fixed Speed 2500 Auto detect Speed to 9600 User Defined AT String Restore Factory Modem Defaults Eee ee Setting the Modem s Baud Rate for the PLC The VT MODEM has an automatic baud ra
41. y DTMF signaling CAUTION The analogue telecommunications interface of the VT MODEM is intended to be connected to Telecommunication Network Voltage TNV circuits which may carry dangerous voltages If it is subsequently desired to open the host equipment for any reason the telephone cord must be disconnected prior to effecting access to any internal parts which may carry telecommunication network voltages Service can be facilitated through our office at Sixnet Northway Ten Professional Park PO Box 767 Ushers Road Clifton Park NY 12065 USA 518 877 5173 VT MODEM User Manual Page 30 of 30 Last Revised 17 Aug 09 Sixnet Technology Park e 331 Ushers Road e Clifton Park NY 12065 USA e 1 518 877 5173 lt support sixnet com
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