ET100A User Manual - Datainterfaces.com
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1. gt 1 7 lt gt 19 the following are all twisted pairs 2 lt gt 4 14 lt gt 22 3 lt gt 6 16 lt gt 24 4 lt gt 7 19 lt gt 25 5 lt gt 9 13 lt gt 27 6 lt gt 11 22 lt gt 29 20 lt gt 12 23 lt gt 30 8 lt gt 13 10 lt gt 31 24 lt gt 17 11 lt gt 35 15 lt gt 5 12 lt gt 23 17 lt gt 8 9 lt gt 26 26 ET100A LAN WAN Bridge X 21 Cables multi conductor round 1m Parttt 58 D1MD2F003 X 21 Cable DB25 Female DB15 Male 1M Part 58 D1FD2F001 X 21 Cable DB25 Female DB15 Female 1M DB25 Female DB15 Male Female PIN PIN 3 lt gt 4 16 lt gt 11 4 lt gt 3 19 lt gt 10 27 ET100A LAN WAN Bridge Application Examples In the following example the ET100A is configured for bridging over an E1 or T1 carrier provider s network The ET100A s interface is set to V 35 to match the CSU DSU unit The CSU DSU may be set unframed or may be set to use a fraction n x 56 or n x 64 of the E1 or T1 line The CSU DSU timing is received from the carrier provider s network so the ET100A s timings for Tx and Rx clocks should be set to external In this configuration the rate DIP setting2. User Manual ET100A Synchronous WAN Ethernet Bridge 10 100Base TX Ethernet over V 35 X 21 RS 232 530 449 union UNION TECHNOLOGIES CO LTD Union Technologies Co Ltd Neihu Technology Park Vienna Technology Center 8F No 60 Zhouzi St Neihu Taipei 114 Taiwan ET100A Ethernet WAN Bridge User Manual Version 2 0 March 21 2014 Release This manual supports the following models ET100A Ethernet WAN Bridge manufactured after March 2014 All specifications subject to change without notice Table of Contents OVERVIEW ae 7 FEATURES Xu EES 7 KE 8 THEORY OF OPERATION 13 DIP SWITCH SETTING TABLES 5 eee ertet Ern 16 WAN PORT PIN ASSIGNMENT 20 CABLE PIN ASSIGNMENTS 24 RS 530 CABLE 25 CONDUCTOR ROUND 1 TO 1 1M 24 V 35 CABLE MULTI CONDUCTOR ROUND JM 25 RS 449 CABLES MULTI CONDUCTOR ROUND IM 26 X 21 CABLES MULTI CONDUCTOR ROUND JM 27 APPLICATION EXAMPLES 28 Table of Contents This page left blank intentionally ET100A LAN WAN Bridge Overview The ET100A Network
3. Bridge is a high performance remote self learning Ethernet bridge 5 compact size and low cost make it ideal for cost sensitive bridging applications or as a LAN extender or segmenter over bit stream type infrastructures Several selectable synchronous data interfaces including V 35 RS 530 RS 449 X 21 and RS 232 make this Ethernet Bridge s connection between 10Base T and 100Base TX LAN and various SYNC data port interfaces convenient Features Supports raw HDLC HDLC and PPP encapsulation m 10BASE T 100BASE TX Full Duplex or Half Duplex m Auto MDI MDIX detects and corrects crossed cable m Automatic address learning aging and deletion after 5 minutes W Forwarding and filtering rate at wire speed with through put latency of 1 frame m Auto padding of undersized packets to meet the minimum Ethernet packet size requirement 1763 packet buffer Ethernet interface has automatic Twisted Pair polarity correction Built in nx64K nx56K timing clock generator for WAN link for speeds up to 10mbps 256 MAC Table Ethernet flow control per IEEE802 3x ET100A LAN WAN Bridge Specifications B LAN Standard Connector Speeds MTU MAC Table WAN Interface Protocol Buffer Connector Type Data Rates Clock Source General Power Environment Dimensions Weight SYNC green LINK green Rx green Tx green PWR green ERROR red ACT green LINK green Fully compliant wi
4. AN speed Without flow control the LAN packets that exceed the WAN speed will be dropped and the resulting timeout caused must be handled by the application layer LAN Auto Negotiation The ET100A LAN port supports auto negotiation per IEEE802 3u When auto negotiation is enabled and the LAN port connects to another auto negotiation compliant port the LAN speed will be auto detected while the Duplex should be negotiated to Full Duplex When connecting to legacy equipment it may be necessary to the speed and Duplex on the LAN port Care must be taken here to avoid Duplex Mismatch condition when a forced port connects to an auto port Without negotiation an auto port will revert to Half Duplex per the IEEE802 3u standard A Duplex Mismatch condition could result in extremely poor network performance WAN Interface Selection The ET100A has selectable hardware interface circuits When set to X 21 RS 530 RS 449 the logic clock and handshaking signals all follow RS 422 electrical balanced signals When set to RS 232 all signals become single ended and follow RS 232D signal levels When configured as V 35 the logic and clock signals follow RS 422 electrical while handshaking signals are RS 232 electrical 19 ET100A LAN WAN Bridge WAN Port Pin Assignment The following tables give the pin circuit function and signal direction as seen on the ET100A s DB25M connector for each of the selectable inter
5. The ET100A performs in DTE mode and its WAN port connector may be connected directly to a DCE device such as a modem or DSU CSU SYNC LED Green where ON indicates protocol is up If OFF first make sure physical link is up then make sure protocol settings match LINK LED Green where ON indicates the presence of CTS DSR signal on WAN connection RX LED Green on or flashing indicates receiving data on the WAN interface TX LED Green on or flashing indicates transmitting data on the WAN interface SW1 Configuration setting for the bridge Please refer to DIP SW setting table SW2 Configuration setting for the bridge Please refer to DIP SW setting table RJ 45 Ethernet LAN Port This is an auto MDI MDIX port for connection to the LAN 11 ET100A LAN WAN Bridge 9 10 11 12 13 LINK LED LAN Green indicates the Ethernet has a link to an external device ACT LED LAN Green indicates data being received from the LAN connection ERROR LED Red indicates an error condition as follows ON System Error Pulse 2 Configuration error Pulse 3 WAN receive has CRC errors PWR LED Green on when external power adapter is plugged in and AC power is supplied to it DC 9 12V This jack receives power from the external DC 12V AC power switching adapter The center pin is positive voltage 12 ET100A LAN WAN Bridge Theory of Operation A bridge is used to connect n
6. eceive dataa IN 104 OUT 105 CleartosendA IN 106 DM A ____ DatasetreadyA IN 10 GND ____ Signalground 102 RR A DatacarrierdetectA IN 109 RT B ____ ReceiveclockB IN 145 RRB ____ Data carrier detectB IN 109 113 ST 14 CSB CleatosendB IN 106 OUT 103 STA mitdlocka IN 114 RD B 1 Receive dataB IN 1104 RI ____ ReceiveclockA IN 115 OUT 105 OUT 108 DM B ____ DatasetreadyB_ 1 IN 1107 OUT 108 113 Table 10 RS 449 RS 530 INTERFACE PIN ASSIGNMENT SW2 1 2 ON OFF 22 ET100A LAN WAN Bridge d X 21 INTERFACE PIN ASSIGNMENT PIN CIRCUIT FUNCTION DIRECTION CCITT 1 FGND ____ 1101 3 Receivedataa IN 104 7 629 Signalground 1102 8 Ja DatacarrierdetectA IN 1109 9 58 ____ ReceiveclockB IN 15 10 Data carrier detecte IN 1109 16 R B ReceivedataB IN 1104 17 S jReeivedockA IN ms Table 11 X 21 INTERFACE PIN ASSIGNMENT SW2 1 2 ON OFF 23 ET100A LAN WAN Bridge Cable Pin Assignments RS 530 Cable 25 conductor round 1 to 1 1m Use this cable for RS 232 applications as well 58 2 02 007 RS 530 Cable 0825 Female lt gt DB25 1 Meter Part 58 D2FD2F010 RS 530 Cable DB25 Female lt gt DB25 Female 1 Meter DB25 Female DB25 Male Female PIN PIN 1
7. es the factory all DIP switch settings are set to the OFF position Auto negotiation When this feature is enabled SW1 6 OFF the Speed SW1 7 and Duplex SW1 8 settings are ignored and are automatically determined from the LAN connection When this feature is disabled SW1 6 ON the Duplex and Speed settings of the LAN follow the settings of SW1 7 and SW1 8 Use forced mode with caution to avoid Duplex Mismatch Protocol Selection The ET100A supports selecting one of three encapsulation protocols When selecting HDLC the encapsulation is per ISO 13239 The cHDLC encapsulation is compatible with Cisco modified HDLC The PPP encapsulation follows RFC1661 and is also a very popular encapsulation protocol The protocol selection is controlled by the setting of DIP switches SW1 1 SW1 2 Clock Selection The ET100A inherently acts as a DTE device A 1 1 cable is used to connect to a DCE device such as a modem CSU DSU or data multiplexer Clock source comes from the DCE so the clock setting is usually external SW1 4 OFF The ET100A is also capable of acting as DCE In this case crossover cable is required and clock setting SW1 4 ON is internal Data rate is then set by SW2 379 and ET100A provides clock source 18 ET100A LAN WAN Bridge LAN Flow Control The ET100A LAN port supports IEEE802 3x flow control which can help to regulate the higher speed LAN traffic that hits the bottle neck of the slower W
8. etworks locally or remotely such that they appear to the user to be the same network An Ethernet LAN bridge will connect two LAN segments at the Data Link Layer ISO Layer 2 At this layer the MAC Media Access Control addresses are used for low level addressing to send information to devices The bridge builds tables of MAC addresses for each network segment based on the source and destination addresses of the packets it receives and forwards then filters the traffic not destined for the remote network The Ethernet WAN bridge will connect two remote Ethernet networks over bit stream interfaces such as that of synchronous modems or DSU CSUs One method to do this is to use HDLC an international standard set by the ISO set of protocols for carrying data over link with error and flow control Another method uses third uses Cisco HDLC The ET100A utilizes both Ethernet Bridging and encapsulation to provide a connection between LANs over bit stream architectures The LAN side of the ET100A receives an Ethernet packet and examines its destination MAC address If it knows the MAC is on the local network then it simply drops the packet Otherwise if it knows the packet destination is on the remote side or if it cannot be determined because its MAC cannot be found in the table then it forwards it During forwarding the packet is processed for transmission across the WAN link Here is where the Ethernet packet in encapsula
9. faces RS 232 and 5 530 connections may be made directly Adapter cables are required to match the physical connectors for V 35 MB34 21 0815 and RS 449 DB37 V 24 RS 232 INTERFACE PIN ASSIGNMENT PIN CIRCUIT FUNCTION DIRECTION 1 FGND ____ faa 2 TD ____ or 3 RD L ecehe dap BBC 5 C Glartosend NN 6 DR ____ Datasetready IN lt 7 GND Signalground a8 8 DOD ____ 25 TC Transmitclock IN 08 17 Receiveclock IN p Table 8 RS 232 Interface Pin Assignment SW2 1 2 ON ON 20 ET100A LAN WAN Bridge b V 35 INTERFACE PIN ASSIGNMENT PIN CIRCUIT FUNCTION DIRECTION CCITT 1 FGND ProtectveGND 1101 3 _ C Recevedtaa IN 104 5 015 Cleartosend IN 106 6 DSR _____ Datasetready IN 107 7 GND Signalground 1102 8 DCD ____ Data carrier detect IN 109 9 RCB deck IN 115 12 Tc B ___ XmitclockB 14 15 mitelocka IN 1114 16 RD B ReceivedataB IN 1104 17 RCA ReceivedockA IN 15 Table 9 V 35 Interface Pin Assignment SW2 1 2 OFF OFF 21 ET100A LAN WAN Bridge RS 449 RS 530 INTERFACE PIN ASSIGNMENT CIRCUIT FUNCTION DIRECTION CCITT GND ____ ProtectiveGND_ Lo OUT __ 103 ____ R
10. hnical Support Department techsupport ctcu com From Company Name MODEL OET100A ACTIVITY As attached DIP switch setting table SYS CONFIGURATION Question Technical Inquiry Form MODEL ET100A Please fill in the DIP switches configuration with v marks into the following table Send it to us by fax and we will reply to you immediately Your Setting Suggestion DIP FUNCTION ON OFF ON OFF 1 Protocol Selection 2 Protocol Selection 3 WAN Clock Source 4 CTS DSR DCD 5 LAN Flow Control 802 3x 6 Auto Forced 7 10M 100M 8 Full Half Duplex manual 9 reserved 1 2 3 4 5 6 7 8 9 SW NO SW1 SW2 WAN WAN Type WAN Clock Rate Internal WAN Clock Rate Internal WAN Clock Rate Internal WAN Clock Rate Internal WAN Clock Rate Internal WAN Clock Rate Internal WAN Clock Rate Internal Additional comments questions E sales ctcu com 886 2 2659 0237 886 2 2659 1021 D
11. lt gt 1 2 lt gt 2 3 lt gt 3 A lt gt 4 5 lt gt 5 6 lt gt 6 7 lt gt 7 8 lt gt 8 9 lt gt 9 10 lt gt 10 11 lt gt 11 12 lt gt 12 13 lt gt 13 14 lt gt 14 15 lt gt 15 16 lt gt 16 17 lt gt 17 18 lt gt 18 19 lt gt 19 20 lt gt 20 21 lt gt 21 22 lt gt 22 23 lt gt 23 24 lt gt 24 25 lt gt 25 24 ET100A LAN WAN Bridge V 35 Cable multi conductor round 1m Parttt 58 D2FM3M001 V 35 Cable DB25 Female MB34 Male 1 Meter Parttt 58 D2FM3F000 V 35 Cable 0825 Female MB34 Female 1 Meter DB25 Female MB34 Male Female PIN PIN 2 gt P 14 lt gt 5 3 gt R 16 lt gt 4 5 6 20 8 24 lt 3 lt lt lt 5 gt 11 lt gt W 15 lt gt Y 12 lt gt AA 17 lt gt V 9 lt gt X NOTE TWISTED PAIRS P S R T UW Y AA VX 25 ET100A LAN WAN Bridge R5 449 Cables multi conductor round 1m Parttt 58 D2FD3M003 RS 449 Cable DB25 Female DB37 1M Parttt 58 D2FD3F000 RS 449 Cable DB25 Female DB37 Female 1M DB25 Female DB37 Male Female PIN PIN 1 lt
12. s including the Application layer Transmitting bit stream or TDM time division multiplexed data over Ethernet requires a device such as an IP Multiplexer Please refer to the Applications section at the end of this manual for additional application examples 15 ET100A LAN WAN Bridge DIP Switch Setting Tables FUNCTION HDLC Cisco HDLC PPP Table 1 Encapsulation Protocol Setting DIP SW1 STATE FUNCTION REMARK 3 WAN CLK External Internal ON Table 2 Clock Source Setting DIP SW1 STATE FUNCTION REMARK 4 eu C TS DSR Active DCD always on Table 3 DCD Handshaking Setting SWT STATE FUNCTION REMARK 5 Enable 802 3 Disable Table 4 LAN Flow Control Settings SWi 6 SWi 7 SWi 8 Function REMARK D X Auto SW1 7 1 8 don t care ON 55 OFF 100 Full ov 10 Full ON ON 10 Half Table 5 LAN Interface Setting SW2 1 SW2 2 TYPE O O V 35 ON O X 21 RS 530 RS 449 ON ON RS 232 Table 6 WAN Interface Type Setting 16 ET100A LAN WAN Bridge When the is set to internal WAN clock SW2 3 to SW2 9 provision the data rate If WAN clock is set external these are ignored r r h rbar bo fe N 64K N 56K HS 1 HS 2 Table 7 Data Rate Settings 17 ET100A LAN WAN Bridge When the ET100A leav
13. s of the ET100A are ignored LANB ar E ET100A V35 A Ethemet ET100A V35 CSU DSU Ethernet EY CSU DSU Figure 5 Bridging over E1 services 28 ET100A LAN WAN Bridge APPLICATIONS In the next example the ET100A is setup to bridge over a PSTN s leased line The ET100A s speed settings depend upon the speed of the leased line and the settings of the modems The timing scheme recommended is this application is for the Tx and Rx Clocks of each unit to be set to External while the clocks of the modems are set to Internal for both or Internal for one and Loop for the other LANA Leased LANB Line ET100A 232 MODEM MODEM ET1004 232 Ethemet NL 4 IN Ethemet Figure 6 Bridging over Synchronous leased line 29 ET100A LAN WAN Bridge APPLICATIONS In the following example the ET100A is paired with a G703 64K interface converter to provide connection over 6 703 64Kbps services If the G 703 transmit and receive clocks are provided by the central carrier each G703 64K converter will be set to centra directional line timing Both ET100A s will have their Tx Rx clocks set external G 703 64K LANB G703 64K Services G703 64K Interface Interface Converter Converter i 100 530 100 530 Figure 7 ET100A bridge over 6 703 64 services 30 CTC Union Technologies INC 886 2 27991355 886 2 26591021 Attn Tec
14. ted 13 ET100A LAN WAN Bridge When the HDLC or PPP packet is received on the remote side unit s data port the packet is checked for transmission errors then the original Ethernet packet s is recovered and sent out the remote s LAN port completing the transmission Here is the typical application of the ET100A LANA LAN B ET100A V35 csU DSU ET100A V35 Ethernet my Ethernet Figure 3 Typical application of ET100A LAN WAN Bridge CSU DSU Many times the ET100A is commonly referred to as an Ethernet to V 35 Ethernet to X 21 or Ethernet to Datacom converter As a sales marketing term or non technical reference the term is OK However from a technical standpoint the term is a misnomer The Ethernet is not converted to V 35 it is run over the V 35 link Conversion also implies that the interface can work both ways This is NOT the case for the LAN WAN Bridge as the following application shows ET100A V35 gt 2 ET100A V35 4 pm 98 V 35 Ethernet Ethemet V 35 Figure 4 Application NOT ALLOWED for ET100A 14 ET100A LAN WAN Bridge Why does the previous application not work It won t work because the application requires a bit stream to be encapsulated into Ethernet packets or into TCP IP and then Ethernet for transmission across the LAN This requires more than just manipulation at the Data Link layer ISO Layer 2 it requires programming to include all seven layer
15. th IEEE 802 3 802 3u 802 3x Shielded RJ 45 10BASE T 100BASE TX Full or Half Duplex 1536 bytes 256 addresses Selectable RS 232 SYNC V 35 RS 449 530 and 21 Synchronous HDLC or Cisco HDLC 1763 Packets DB25 Male DTE port n x 64 56 Kbps up to 10Mbps Internal or External AC Adapter EUP 100 240VAC 12VDC 1A Unit DC9 12V 300mA Temperature 0 50 C Humidity lt 90 non condensing 135 L x 80 W x 25 H mm 150g LED INDICATORS ON WAN Protocol Up ON receiving CTS and DSR signal ON WAN receive data blinking ON WAN transmit data blinking ON Power OK OFF system OK 2 pulse configuration error 3 pulse WAN CRC OFF No link Blinking receiving data ON LAN linked OFF no link ET100A LAN WAN Bridge WAN SIDE DB25 Male Interface DTE Select RS 530 449 RS 330 049 Serial Port LINK X8 ine Dr 7 Ae Line Drivers Rx LED RS 232 SYNC Clock SYNG Source HDLC CONTROLLER Generator FILTER ENGINE SPEED N56K to MAC Address Table 1792K N64K to 10M ACT TE LAN SIDE Kg RJ 45 Figure 1 ET100A Functional Block Diagram ET100A LAN WAN Bridge Unit Detail Figure 2 ET100A Unit Detail 10 ET100A LAN WAN Bridge 1 2 3 4 5 6 7 8 DB25 Male Connector This connector connects to the appropriate adapter cable for connection to the various supported data interfaces
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