Black Box SC120A-R2 User's Manual
Contents
1. Tape Drive RAID Tape Drive Figure 5 8 Sample application CHAPTER 5 Configuration and Operation 5 11 Network Control of SCSI Switch The 2 x 2 SCSI Matrix Switch may be controlled over a TCP IP network through its LAN port 5 11 1 LAN PORT CONFIGURATION You can remotely control the SCSI Switch through a standard 10 Mbps Ethernet connection running TCP IP In the SCSI Switch s factory default setting the LAN port will be enabled and the RS 232 COM2 port which shares the same circuitry and is most often used for daisychaining SCSI Switches will be disabled If you want to daisychain SCSI Switches you will need to disable the LAN port and enable the port To do this scroll through the control menus in the switch s front panel LCD see Section 4 3 until you reach the SET SERIAL PORTS menu Move the cursor to the DAISY CHAIN option and press ENTER on the switch s keypad to change the setting from N to Y 2 X 2 SCSI MATRIX SWITCH 5 11 2 APCONCFG UTILITY The apconcfg exe utility is used to configure the TCP IP address This utility is provided on the included CD ROM You can reconfigure the IP address by using the IP Configuration Utility Run apconcfg exe from the CD ROM provided with your 2 x 2 SCSI Matrix Switch A Configure Network Switch window will appear Enter the new IP address and switch MAC address in the appropriate fields The MAC address can be found on a label located on the bottom2. Signal Name Pin Number Signal Name Pin Number 29 63 Ground 30 Ground 64 DB 8 31 DB 8 65 DB 9 32 DB 9 66 DB 10 33 DB 10 67 DB 11 34 DB 11 68 Table 6 3 SCSI connector assignments for low voltage differential LVD 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number DB 12 DB 13 DB 12 35 DB 14 DB 15 DB P1 DB 0 DB 1 DB 2 DB 2 42 DB 3 DB 3 43 2 X 2 SCSI MATRIX SWITCH Table 6 3 continued SCSI connector assignments for low voltage differential LVD 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number DB 4 10 DB 4 44 DB 5 11 DB 5 45 DB 6 12 DB 6 46 DB 7 13 DB 7 47 DB P 14 DB P 48 Ground 15 Ground 49 DIFFSENS 16 Ground 50 TERMPWR 17 TERMPWR 51 TERMPWR 18 TERMPWR 52 Reserved 19 Reserved 53 Ground 20 Ground 54 ATN 21 ATN 55 Ground 22 Ground 56 BSY 23 BSY 57 ACK 24 ACK 58 RST 25 RST 59 MSG 26 MSG 60 CHAPTER 6 SCSI Technical Information Table 6 3 continued SCSI connector assignments for low voltage differential LVD 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number SEL 27 SEL 61 C D 28 C D 62 REQ 29 REQ 63 30 64 DB 8 31 DB 8 65 DB 9 32 DB 9 66 DB
3. e y z a HH A E d pe pe 9570 055 Sie se O O T Figure 6 1 SCSI Switch component placement e Internal termination jumper block E13 E14 E19 E20 on SC120A R2 or E15 E16 E21 E22 on SC121A see Section 5 3 7 Troubleshooting 7 1 Calling Black Box If you determine that your 2 x 2 SCSI Matrix Switch is malfunctioning do not attempt to alter or repair the unit It contains no user serviceable parts Contact Black Box at 724 746 5500 Before you do make a record of the history of the problem We will be able to provide more efficient and accurate assistance if you have a complete description including the nature and duration of the problem when the problem occurs the components involved in the problem any particular application that when used appears to create the problem or make it worse and the results of any testing you ve already done 7 2 Shipping and Packaging If you need to transport or ship your 2 x 2 SCSI Matrix Switch Package it carefully We recommend that you use the original container e If you are shipping the switch for repair make sure you include everything that came in the original package Before you ship contact Black Box to get a Return Authorization RA number LEGAL INFORMATION DISCLAIMERS AND NOTICES The manufacturer specifically disclaims the implied warrant
4. Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las instrucciones de operaci n Todo otro servicio deber ser referido a personal de servicio calificado El aparato el ctrico debe ser situado de tal manera que su posici n no interfiera su uso La colocaci n del aparato el ctrico sobre una cama sof alfombra o superficie similar puede bloquea la ventilaci n no se debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilaci n El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amplificadores que producen calor El aparato el ctrico deber ser connectado a una fuente de poder s lo del tipo descrito en el instructivo de operaci n o como se indique en el aparato NOM STATEMENT 12 Precauci n debe ser tomada de tal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada 13 Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos poniendo particular atenci n a los contactos y recept culos donde salen del aparato 14 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa deber ser localizada lejos de las lineas de energia 16
5. A1B2K lt cr gt report none NOTE K Connects specified ports but also breaks former connections and maintains proper termination as per SCSI rules N Connects specified ports without regard for former connections or termination F Disconnects the specified ports b Report SCSI Port Matrix Assignment Status example command lt cr gt S lt cr gt example report A1B2K c Select SCSI Terminator Matrix example command lt cr gt lt AB12k gt lt cr gt report none d Report SCSI Terminator Status example command lt cr gt s lt cr gt example report AB12k e Lock Front Panel example command lt cr gt L lt cr gt report none f Unlock Front Panel example command lt cr gt U lt cr gt report none g Report Model Serial Number and Date of Manufacture example command cr cr example report SC121A 21121150 10 15 02 SC121A model number 21121150 serial number 10 15 02 date of manufacture mm dd yy h Report Alarm Status example command lt cr gt la lt cr gt report format axy x and y ASCII 1 or 0 x 0 OK Iz Overtemperature y 0 OK 1 Power supply failure CHAPTER 5 Configuration and Operation i Report Temperature example command lt cr gt t lt cr gt example report t 19 5 19 5 19 5 C 67 F j Report SCSI Bus Performance example command lt cr gt P lt cr gt report format P lt aabb1122 gt lt cr gt F
6. BLACK BOX er SC120A R2 SC121A 2 x2 SCSI Matrix Switch 5 2 CUSTOMER Order toll free in the U S Call 877 877 BBOX outside U S call 724 746 5500 SUPPORT FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 INFORMATION Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com FCC IC STATEMENTS EU DECLARATION OF CONFORMITY FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates uses and can radiate radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This d
7. Figure 3 1 The SCSI Switch s rear panel 3 6 RS 232 Serial Port Cabling The SCSI Switches have a DB9 female RS 232 serial port on their rear panel pinned so that you can use a straightthrough pinned DB9 male to female serial cable such as the one provided with the SCSI Switch to connect it to the DB9 male serial ports on a PC Pins 1 2 3 5 and 6 CD TD RD SGND and DSR respectively are functional on the SCSI Switch s RS 232 port Pins 4 and 8 DTR and CTS are tied together and Pins 7 and 9 RTS and RI have no function 3 7 Ethernet LAN Port Cabling The SCSI Switches have an RJ 45 female 10BASE T Ethernet port on their rear panel Use a standard straight through pinned twisted pair cable CAT5 or higher to connect this port to an Ethernet hub switch or router To connect this port directly to a IOBASE T port on a computer you ll need to use a cross pinned cable CHAPTER 4 Operator Controls and Indicators 4 Operator Controls and Indicators 4 1 AC Power Switch The AC power switch is located on the SCSI Switch s rear panel Move it to the position to turn on the switch NOTE Always turn on the SCSI Switch before powering SCSI devices and computers This will ensure that devices are found when the system boots up 4 2 LCD Display Keypad and Indicators 4 2 1 LCD DISPLAY The LCD display shows the selection parameters available SET PORTS SET TERMINATION DISPLAY PORTS DISPLAY ACTIVITY
8. xx ASCII representation of decimal value from 01 through 32 report none q Set Lock Unlock Front Panel Password example command lt cr gt OPxxxx lt cr gt xxxx ASCII 4 digit decimal number from 0000 to 9999 report none r Set Temperature Limit example command lt cr gt OT lt cr gt xx ASCII 2 digit decimal number from 15 to 55 degrees C report none s Report Revision of SCSI Switch s Firmware example command lt cr gt R lt cr gt example report 2059722 t Lock Serial Ports example command lt cr gt OLxxxx lt cr gt password set with OP command ASCII 4 digit decimal number from 0000 to 9999 example report lOLI pass if password entered correctly OLO fail otherwise u Unlock Serial Ports example command lt cr gt OUxxxx lt cr gt password set with OP command ASCII 4 digit decimal number from 0000 to 9999 example report OU1 pass if password entered correctly OUO fail otherwise v Report Serial Port Lock Status example command lt cr gt OS lt cr gt example report OSI lock if the serial ports are locked OSO open otherwise CHAPTER 5 Configuration and Operation 5 7 ASCII Character Reference for SCSI Switch Box Selection Switch gt 1 2 3 4 5 6 7 8 ASCII DEL a b Switch 9 10 11 12 13 14 15 16 ASCII d e f g h i j k Switch 17 18 19 20 21 22 23 24 ASCII n 0 q r S Switc
9. RXD Receive Data 2 3 TXD Transmit Data 3 2 DTR Data Terminal Ready 4 20 GND Signal Ground 5 7 DSR Data Set Ready 6 6 RTS Request to Send 7 4 CTS Clear to Send 8 5 RI Ring Indicator 9 22 CHAPTER 5 Configuration and Operation 5 6 LAN Serial Port Commands You can use simple ASCII character commands to control the SCSI Switch through either its LAN port by opening a socket connection to port 3001 or one of its RS 232 serial ports For serial control set your computer s serial port this way a Baud rate 9600 the switch s factory default or 19 200 bps b Data format 8 data bits 1 stop bit no parity c Transmission mode Half duplex So for example the DOS command to set a PC for serial communication with the switch would be MODE COMx 9600 N 8 1 Whether you re using a LAN or serial connection commands have the same syntax format a Start sequence ASCII cr carriage return followed by two slashes b Switch box number you need this even if you have only one SCSI Switch Box 1 7C hex ASCII Box 3 7E hex ASCII Box 2 7D hex ASCII Box 4 7F hex ASCII lt del gt Port selection Port A to port 1 AT port A to port 2 A2 Port B to port 1 B1 port B to port 2 B2 NOTE 1 More than one port connection can be selected at the same time For example to select A1B2 transmit A1B2 2 0 clears disconnects all number
10. S N and lt cr gt lt cr gt text Date of Manufacture Report Alarm Status a lt gt lt gt I laoo Report Temperature t gt 66 lt Celsius Report Performance P lt cr gt P lt cr gt I PAABB1122 Report SCSI Bus lt gt lt gt 2 71 Inactivity 1137 7 s or 19 m Yankon SCSI Reset Y lt cr gt ABiY lt cr gt PortsA B and1 reset CHAPTER 5 Configuration and Operation Table 5 4 continued SCSI Switch commands Command Cmd Example Example Result or Chars Command String Response Enable Disable Alarm OA lt cr gt OAO lt cr gt Alarm enabled Set Baud Rate OB lt cr gt OB10 lt cr gt COM2 9600 bps Set Serial Port Mode OC lt cr gt OCO lt cr gt Daisychain enabled Set Switch Number OD lt cr gt OD06 lt cr gt Switch 6 Set Lock Unlock OP lt cr gt OP3156 lt cr gt Password 3156 Password Set Temperature Limit OT lt cr gt OT45 lt cr gt Max temp 45 C Report Revision R lt cr gt R lt cr gt 2024610 Lock Serial Ports OL lt cr gt OL3156 lt cr gt OL1 pass OLO fail Unlock Serial Ports OU lt cr gt 0U3156 lt cr gt DU1 pass OUO fail Report Serial Port OS lt cr gt OS lt cr gt OS1 lock Lock Status DSO open 2 X 2 SCSI MATRIX SWITCH EXPANDED LIST OF COMMANDS a Select SCSI Port Matrix example command cr
11. in seconds The SCSI Switch will not change the switch settings on a bus until there has been no activity for the specified number of seconds Valid range is 0 to 25 seconds Ignore SCSI bus activity Switch settings will be changed immediately t termination Termination can be turned on N or off F for each port A B 1 or 2 For example A2NB1F activates termination for ports A and 2 and it deactivates termination on ports and 1 Termination on any of the switch s ports that aren t specified in the command will not be affected s lt Switch settings The settings to be changed For example A1B2NBIA2F connects ports and 1 and B and 2 and disconnects ports B from 1 and A from 2 Switch settings on any of the switch s ports that aren t specified in the command will not be affected w lt command gt command is sent to the switch with no parsing Any response from the switch is ignored r lt command gt command is sent to the switch with no parsing Any response from the switch is displayed on the console s error output 6 SCSI Technical Information 6 1 SCSI Basics 6 1 1 SCSI 1 The original specification supports data transfers up to 5 MBps on an 8 bit wide parallel data bus SCSI 1 standards had some incompatibility problems between host adapters and peripheral devices The need to improve compatibility increase transfer rates and add other features for better perform
12. ports SCSI ports A and B have two daisychained connectors per port and SCSI ports 1 and 2 have single connectors for installation of SCSI devices You can install the SCSI Switch at any point on the SCSI bus Each port has internal termination that can be turned on or off from the LCD panel External terminator power TERMPWR for devices and terminators are provided by internal resettable fuses The SCSI Switch does not require a device ID and is completely transparent to all computers and peripherals on the SCSI bus No additional software is needed for installation and operation A universal switching power supply automatically adapts to input voltages between 95 VAC and 260 VAC 2 3 3 ULTRA2 SCSI COMPATIBILITY The SCSI Switch supports Ultra2 SCSI 80 MBps wide SCSI host adapters computers and peripherals in asynchronous and synchronous mode SC120A R2 also supports Ultra160 SCSI 160 MBps devices The SCSI Switch conforms to ANSI X3 131 and X3T9 2 specifications for single ended devices Disconnect and reselect functions are fully supported to ensure complete SCSI compatibility 2 3 4 SCSI SWITCH INSTALLATION Ports A and B are fully bidirectional to ports 1 and 2 see Figures 2 1 through 2 3 You determine where to connect computers host adapters and peripherals In general if daisychained ports are required for connection to external peripherals use ports A or B The LCD panel is used to select port connections and e
13. El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objetos liquidos no sean derramados sobre la cubierta u orificios de ventilaci n 18 Servicio por personal calificado deber ser provisto cuando A El cable de poder o el contacto ha sido danado u B Objetos han ca do o l quido ha sido derramado dentro del aparato o C El aparato ha sido expuesto a la lluvia o D El aparato parece no operar normalmente o muestra un cambio en su desempe o o E El aparato ha sido tirado o su cubierta ha sido da ada 2 X 2 SCSI MATRIX SWITCH TRADEMARKS USED IN THIS MANUAL BLACK BOX and the logo are registered trademarks of Black Box Corporation Microsoft Windows and Windows NT are registered trademarks or trademarks of Microsoft Corporation in the United States and or other countries UL is a registered trademark of Underwriters Laboratories Incorporated Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners TABLE OF CONTENTS Contents Chapter Page 1 SpecificAalloDs iteration aure RECO I EORR OO kr OO puse EHI tra e be ees 7 2 0 di 10 9 11 About the SCSUSWitchi nociones 10 2 9 JFeat tesicenteeeito seemed eiae eiui 10 Palin atada 11 2 2 2 Front Panel Controls 11 2 3
14. of the switch You can search for the IP address by clicking the search button in the Configure Network Switch This will bring up a Search for Network Switches window Enter a beginning IP address an ending IP address and click Search Command strings to control the SCSI Switch may be manually entered through certain versions of HyperTerminal to support connections to IP addresses through the LAN NOTE You will need to specify port 3001 when establishing the connection CHAPTER 5 Configuration and Operation 5 11 3 APCONCMD UTILITY The apconcmd exe utility enables the user to set switch parameters through the LAN port This utility is located on the CD ROM provided with your SCSI Switch To change switch settings and termination for an SCSI Switch run ata DOS prompt APCONCMD EXE from the CD ROM Usage apconcmd i IP address gt c COM b baud rate gt n lt Switch number gt h lt holdoff gt x t termination s lt Switch settings gt w lt command gt r lt command gt Where this message 1 lt IP address gt The IP address of the network enabled SCSI Switch c COM port The number of the COM port to address 1 to 8 default 1 b baud rate The baud rate of the COM port 2400 9600 or 19200 bps default 9600 n Switch number The number of the SCSI Switch to change 1 to 32 default 1 h holdoff SCSI bus holdoff
15. 0A R2 TERMINATION CONFIGURATION Internal termination on Logic Component is always on by default and is not settable at the point of the logic components see Figure 5 1 To ensure proper termination when configuring the switch termination always have the termination enabled at the specified alphanumeric port and the termination disabled at the specified numeric port Example Host adapter is connected to port 1 port 1 termination disabled target device connected to port A port A termination enabled with port Al enabled through the switch see Figure 5 1 Termination Selectable Termination Selectable Termination Selectable VN Termination Termination Always Selectable Termination Figure 5 1 Termination configuration 2 X 2 SCSI MATRIX SWITCH Termination Always ON Termination Always ON Termination Always ON Termination Always ON Co Selectable Termination ON Secondary Server Figure 5 3 SC120A R2 termination example 2 CHAPTER 5 Configuration and Operation 5 3 Selecting Internal Terminator Power On board SCSI Switch terminators can be powered by internal 5 volt power or externally from SCSI bus terminator power TERMPWR 1 Internal 5V O External Terminator Power 3 Figure 5 4 Internal terminator power jumpers E13 E14 E19 E20 or E15 E16 E21 E22 Table 5 1 Jumper settings for internal termination SC120A
16. 10 33 DB 10 67 DB 11 34 DB 11 68 2 X 2 SCSI MATRIX SWITCH Table 6 4 SCSI distance device support STA Term Maximum Bus Length M Maximum Devices SE HVD LVD SCSI 1 6 25 8 Fast SCSI 6 25 8 Fast Wide SCSI 6 25 16 Ultra SCSI 1 5 25 8 Ultra SCSI 3 4 Wide Ultra SCSI 25 16 Wide Ultra SCSI 1 5 8 Wide Ultra SCSI 3 4 Ultra2 SCSI N A 25 25 2 Ultra2 SCSI N A 12 12 8 Wide Ultra2 SCSI N A 25 25 2 Wide Ultra2 SCSI N A 12 12 16 CHAPTER 6 SCSI Technical Information To access jumper options Remove the four screws on the bottom of the unit Then lift off the cover 0 o 0 Bn 0 Bad HEAD 0 HO B o 050001 i of 5 p m naa Ei p mu Jom E E ge al d d di di aM On E n o D n n it op AM E 0 o n 0 n pa
17. 25 5 4 Selecting External Terminator Power sese 25 5 5 Senal Potrt reper EN PO EGRE YER RENE 26 5 6 LAN Serial Port Commands eese eere eee aene enn na 27 5 7 ASCII Character Reference for SCSI Switch Box Selection 98 2 X 2 SCSI MATRIX SWITCH Chapter Page 5 Configuration and Operation continued 5 8 Graphical User Interface GUI cnica iria tete 5 9 Connecting Multiple SCSI Switches see 5 10 Typical Application ee vss iere tre reete eerte E 5 11 Network Control of SCSI 516 5 1E LEAN Port Configuration nin ceret DO 5 112 Cfesvatch 1 5 11 3 Apconemd Utility ccr rm eet erre rre steer 6 SCSI Technical Information 98 6 1 SGST Basics TREE 6 1 4 Signal Wiring 8 6 1 5 Common Problems iia 6 1 6 Passive Terminator nidad 6 1 7 Active Terminator iii daa dd 6 2 SCSI Installation Tips corria teet 9 6 3 SCSI Interface Signal Descriptions eee enn 40 7 Lroubleshooting eben eee eti ed ode ip RR 50 7 1 Calling Black Box 2 ten elm tota 50 4 2 Shipping and Packaging eni deoneno tete etiim 50 1 Specifications SCSI Interface Maximum Port Switching Delay 3 ns Maximum Signal Skew 2 ns Internal Terminator Power 1 amp Rear Panel Connectors 68 pin high density SCSI 1 SCSI 2 and SCSI 3 also Ultra160 SC
18. 60 volts Unless otherwise specified the switch will be shipped with a 110 volt power cord for use in the USA For a power cord that will work in your country outside the USA call Black Box Technical Support 3 3 Switch Placement Place the SCSI Switch in a convenient location near the host computer or peripherals Keep SCSI cable lengths short to provide the best performance and reliability Make sure that the dual fans and ventilation slots on the sides of the switch receive adequate airflow Do not place the switch on or near any devices that generate excessive heat 3 4 Power Equipment Off Power off all equipment and peripherals connected to the SCSI interface before installing cables or terminators 2 X 2 SCSI MATRIX SWITCH 3 5 SCSI Interface Cabling Both versions of the 2 x 2 SCSI Matrix Switch have 68 pin high density connectors Single ended devices can have cable lengths up to 20 ft 6 m Differential or low voltage differential LVD devices can be connected with up to 82 ft 25 m of cable Connect the host adapter or peripheral to the rear panel connector using a proper SCSI cable Section 6 1 describes standard SCSLinterface requirements When you connect devices to ports A and B use one of the port connectors not both NOTE Do not intermix single ended LVD and differential devices on any SCSI chain unless a SCSI differential converter is used to convert from one bus type to the other
19. CHAPTER 6 SCSI Technical Information DBO through DB15 P P1 DATA BUS Sixteen data bit signals and two parity bit signals that together form a data bus DBI5 is the most significant bit and has the highest priority during the Arbitration phase Bit number significance and priority decrease downward to DBO A data bit is defined as a one when the signal value is true and as a zero when the signal value is false Data parity DBP and DBPI shall be odd Table 6 1 SCSI connector assignments for single ended SE 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number Ground 1 DB12 35 Ground 2 DB13 36 Ground 3 DB14 37 Ground 4 DB15 38 Ground 5 DBP1 39 Ground 6 DBO 40 Ground 7 DB1 41 Ground 8 DB2 42 Ground 9 DB3 43 Ground 10 DB4 44 Ground 11 DB5 45 Ground Ground Ground 2 X 2 SCSI MATRIX SWITCH Table 6 1 continued SCSI connector assignments for single ended SE 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number Ground 15 Ground 49 Ground 16 Ground 50 TERMPWR 17 TERMPWR 51 TERMPWR 18 TERMPWR 52 Reserved 19 Reserved 53 Ground 20 Ground 54 Ground 21 ATN 55 Ground 22 Ground 56 Ground 23 BSY 57 Ground 24 ACK 58 Ground 25 RST 59 Ground 26 MSG 60 Ground 27 SEL 61 Ground 28 C D 62 Ground 29 REQ 63 Ground 30 I O 64 Ground 31 DB8 65 CHAPTER 6 SC
20. D panel e Daisychain up to 32 switches e Share up to 32 SCSI peripherals e SC121A supports differential SCSI SC120A R2 supports single ended or LVD SCSI Transparent electronic switching LAN port for TCP IP based network control RS 232 ports for serial control Does not require SCSI bus ID e User installable CHAPTER 2 Introduction 2 2 1 LCD PANEL The 2 x 2 SCSI Matrix Switch features an easy to use menu driven LCD panel with softtouch MENU ENTER and directional keys The LCD is lighted which allows for easy viewing and operation 2 2 2 FRONT PANEL CONTROLS e Set and configure SCSI ports e Set termination e Set switch number View power supply status View internal temperature e Set internal temperature alarm e Set serial port configuration e Display SCSI bus busy status e Display port configuration 2 3 Technical Description 2 3 1 AVAILABLE SCSI SwrrcH INTERFACES The 2 x 2 SCSI Matrix Switch is available in the following configurations Single ended LVD interface SC120A R2 Differential interface SC121A NOTE Make sure that the SCSI Switch you re installing is used with the appropriate interface Single ended LVD and differential SCSI devices cannot be installed on the same switch unless a SCSI differential converter is used 2 X 2 SCSI MATRIX SWITCH 2 3 2 GENERAL HARDWARE DESCRIPTION The 2 x 2 SCSI Matrix Switch s rear panel identifies each of the independent SCSI
21. DISPLAY POWER TEMP FRONT PANEL LOCK SET SERIAL PORTS SET SWITCH NUMBER SET TEMP LIMIT DISPLAY VERSION Figure 4 1 The LCD displays main menu 2 X 2 SCSI MATRIX SWITCH 4 2 2 KEYPAD Use the keypad to select menu and setup parameters for the SCSI Switch MENU Returns to the SCSI Switch setup and configuration menu ENTER Selects the highlighted setup parameter UP DOWN RIGHT LEFT Arrows Scrolls the cursor to enable menu selection 4 2 3 INDICATORS The indicators provide SCSI Switch status information POWER Indicates that the SCSI Switch is powered e BUSY Indicates that there is SCSI activity on one or more SCSI ports ALARM A visual and audible alarm indicates a failure of an internal power supply or that the SCSI Switch has exceeded the set temperature limit NOTE To disable the audible alarm press the front panel MENU key The ALARM light will remain lit until the condition is corrected 4 3 LCD Display Control Menus SET PORTS SET PORTS SET TERMINATION SET TERMINATION A B CHAPTER 4 Operator Controls and Indicators DISPLAY PORTS DISPLAY PORTS 1 8 2 8 1 8 2 SET SERIAL PORTS SET SERIAL PORTS COM 1 9600 COM 2 9600 DAISYCHAIN Y SET SWITCH NUMBER SET SWITCH NUMBER 01 USE UP DOWN KEYS DISPLAY POWER TEMPERATURE DISPLAY POWER TEMP PWR SUPPLY GOOD 25 5 2 X 2 SCSI MATRIX SWITCH SET TEMP LIMIT
22. R2 SC121A E14 Port A E20 Port 1 E15 Port A E21 Port 1 E13 Port B E19 Port 2 E16 Port B E22 Port 2 NOTE The standard factory default connects internal terminators to internal 5 volts 5 4 Selecting External Terminator Power The SCSI Switch can supply external terminator power via an internal resettable fuse This fuse supplies 1 amp at 5 volts to the terminator power TERMPWR signal The SCSI Switch contains internal protection and will not be affected if other SCSI devices provide terminator power Ol E5 E6 E21 E22 or 17 20 Figure 5 5 External terminator power jumpers NOTE Factory default is Enabled on all ports 2 X 2 SCSI MATRIX SWITCH Table 5 2 Jumper settings for external termination SC120A R2 SC121A E6 Port A E22 Port 1 E19 Port A E17 Port 1 E5 Port B E21 Port 2 E20 Port B E18 Port 2 NOTE The standard factory default connects internal terminators to internal 5 volts 5 5 Serial Port Pinout The SCSI Switch contains two RS 232 serial ports using DB9 female connectors these allow external control of the switch The connectors are compatible with standard RS 232 modem cables The serial ports can be configured to operate separate communications ports or as daisychained ports Daisychained mode allows one computer or terminal to communicate with multiple SCSI Switches Table 5 3 Rear panel RS 232 connector pinout Signal Description DB9 Pin DB25 Pin DCD Data Carrier Detect 1 8
23. SET TEMP LIMIT MAX 40 CURRENT TEMP 26 0 DISPLAY BUS ACTIVITY DISPLAY ACTIVITY FRONT PANEL LOCK FRONT PANEL UNLOCKED ENTER PASSWORD TOLOCK0000 DISPLAY VERSION BLACK BOX SC121A S N2100303 HVD VER2112124 LAN In the DISPLAY VERSION panel e HVD LVD or SE at bottom left indicates the current SCSI bus interface mode e at top right indicates that the serial ports are locked LAN at bottom right indicates that the LAN port is active CHAPTER 4 Operator Controls and Indicators 4 4 SCSI Switch Port Configuration The SCSI Switch has an internal memory device that retains the current configuration and setup information Switch port termination serial port and control parameters are saved as they are entered on the front panel 4 5 SCSI Switch Default Configuration The SCSI Switch default configuration as shipped from the factory is defined below PORTS Al B2 TERMINATION SC121A All Off SC120A R2 A B On 1 2 Off SERIAL PORTS 9600 bps SWITCH NUMBER 01 TEMPERATURE ALARM 40 Celsius 104 F FRONT PANEL Unlocked password 0000 5 Configuration and Operation 5 1 SCSI Cable Interface Requirements The 2 x 2 SCSI Matrix Switch can be installed at any point on the SCSI bus Always use high quality cables for optimum computer performance and reliability The SC121A differential switch contains 68 pin high density connec
24. SI Ultra3 SCSI for SC120A R2 SPI 2 compatible asynchronous and synchronous compatible conforms to ANSI X3 131 and X3T9 2 Single Ended SE SCSI SC120A R2 Only Maximum Data Rate 8 bit Narrow 20 MBps Maximum Data Rate 16 bit Wide 40 MBps Maximum Port Cable Length 6 meters 20 ft Internal Terminator Impedance 100 ohms Terminator Disconnect Capacitance 3 pF Active Internal Bus Termination Differential DE SCSI SC121A Only Maximum Data Rate 8 bit Narrow 40 MBps Maximum Data Rate 16 bit Wide 80 MBps Maximum Port Cable Length 25 meters 82 ft Internal Terminator Impedance 110 ohms Terminator Disconnect Capacitance 5 pF Passive Internal Bus Termination 2 X 2 SCSI MATRIX SWITCH Low Voltage Differential LVD SCSI SC120A R2 Only Maximum Data Rate 8 bit Narrow 40 MBps for Ultra2 SCSI narrow transfers aren t officially supported in the Ultra160 SCSI standard Maximum Data Rate 16 bit Wide 160 MBps Maximum Port Cable Length 25 meters 82 ft Internal Terminator Impedance 105 ohms Terminator Disconnect Capacitance 3 pF Active Internal Bus Termination Serial Interface Baud Rate 9600 or 19 200 bps Data Format No parity 8 bits 1 stop bit fixed Maximum Cable Length 15 meters 50 ft Rear Panel Connectors DB9 LAN Port Protocol TCP IP Interface Ethernet Data Rate 10 MBps Rear Panel Connector RJ 45 Agency Approvals UL CUL FCC Class A CE CHAPTER 1 S
25. SI Technical Information Table 6 1 continued SCSI connector assignments for single ended SE 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number Ground 32 DB9 66 Ground 33 DB10 67 Ground 34 DB11 68 Table 6 2 SCSI connector assignments for differential 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number DB 12 DB 12 35 DB 13 DB 13 36 DB 14 DB 14 37 DB 15 DB 15 38 DB P1 DB P1 39 Ground Ground 40 DB 0 DB 0 41 DB 1 DB 1 42 DB 2 DB 2 43 DB 3 DB 3 44 DB 4 DB 4 45 2 X 2 SCSI MATRIX SWITCH Table 6 2 continued SCSI connector assignments for differential 16 bit SCSI wide Signal Name Pin Number Signal Name Pin Number DB 5 12 DB 5 46 DB 6 13 DB 6 47 DB 7 14 DB 7 48 DB P 15 DB P 49 DIFFSENS 16 Ground 50 TERMPWR 17 TERMPWR 51 TERMPWR 18 TERMPWR 52 Reserved 19 Reserved 53 ATN 20 ATN 54 Ground 21 Ground 55 BSY 22 BSY 56 ACK 23 ACK 57 RST 24 RST 58 MSG 25 MSG 59 SEL 26 SEL 60 C D 27 C D 61 REQ 28 REQ 62 CHAPTER 6 SCSI Technical Information Table 6 2 continued SCSI connector assignments for differential 16 bit SCSI wide
26. Technical 6 11 2 3 1 Available SCSI Switch Interfaces sssseorooseeessossossoosseesssssssesesreessse 11 2 3 2 General Hardware Description sssrinin iisisti n 12 2 3 3 Ultra2 SCSI 01107 12 2 3 4 SCSI Switch Installation ona dadas 12 3 T stallatiOD 15 3 1 Whats Included ocacion aiii 15 5 2 AC Lime Voltage cette lia 15 PlaCemietik orien tere rere de Cede orit 15 5 4 Power Equipment rere eee ete rere 15 5 5 SGSI Interface Cabling inier rere ea t ertt 16 5 6 RS 232 Serial Port Cabling vico rere rte een ctc ped 16 3 7 Ethernet LAN Port Cabling 16 4 Operator Controls and Indicators eee 17 AQJPOWGFPSWICh itecto dia 17 4 2 LCD Display Keypad and Indicators 17 4 2 1 LED Display Mr 17 4 2 2 Keypad dt reete re r AE R res 18 4 2 Incl CatOfS eve teen eter o ri en Qn es Paese N n es e EE 18 4 3 LCD Display Control Menus titer trente etr tnnt 18 4 4 SCSI Switch Port Configuration eene nnn nnne 21 4 5 SCSI Switch Default Configuration see ene 21 5 Configuration and Operation sse ren en enne 22 5 1 SCSI Cable Interface Requirements sse ee 22 5 2 Internal Terminator Selection eee eeeeee esent nnno tnn 22 5 3 Selecting Internal Terminator Power see e
27. ance required a review of the specifications 6 1 2 SCSI 2 Improved compatibility and higher transfer rates were provided in this enhancement The addition of Wide SCSI permits 16 or 32 bits to be transferred in parallel the latter requiring two cables In combination with the Fast SCSI option synchronous data transfers up to 10 MBps for 8 bit 20 MBps for 16 bit and 40 MBps for 32 bit buses were achieved 6 1 3 SCSI 3 The most significant additions include the ability to address up to 32 devices a 16 bit single cable data bus and serial SCSI protocol The SCSI 3 standard has been split into several subdocuments including the SCSI Parallel Interface SPI which is based on a layered protocol and the SCSI Interlocked Protocol SIP a software link protocol 6 1 4 SIGNAL WIRING The signal wiring used in a SCSI bus has an impact on bus performance The two wiring techniques generally used for SCSI are single ended and differential With single ended wiring a single wire carries the signal from initiator to target Single ended circuitry is not noise resistant and is generally limited to about 6 meters 20 ft at data transfer speeds of 10 MB per second Differential wiring uses two wires for each signal and offers exceptional noise resistance because it does not rely on a common ground This allows cables up to 25 meters 82 ft and reliable operation at 10 MB or more per second Differential wiring and circuitry is m
28. ed ports For example A0 clears any numbered port connected to port A d Connection or disconnection type ASCII connects the specified ports and strictly adheres to SCSI rules NOTE With K if port A or B is not specified no action will be taken on that port If a connection is selected for example A1 that connection will be made and the other numbered port will be disconnected from that lettered port For example entering A2K when port A is connected to port 1 will disconnect port A from port 1 and connect it to port 2 ASCII N connects the specified ports without breaking existing connections ASCII F disconnects the specified ports e End sequence ASCII cr So for example the complete command to connect the first SCSI Switch s port A to port 2 and its port B to port 1 would look like this cr A2B1K cr 2 X 2 SCSI MATRIX SWITCH Table 5 4 SCSI Switch commands Line Command Cmd Example Example Result or Char Command String Response Select Port K lt cr gt A1K lt cr gt A amp 1 connected Report Port Status S lt cr gt S lt cr gt fa2b0K Select Terminator k lt cr gt A1k lt cr gt A amp 1 terminated Report Terminator Status s lt cr gt s lt cr gt 1 Lock Front Panel L lt cr gt L lt cr gt Panel locked Unlock Front Panel U lt cr gt U lt cr gt Panel unlocked Report Model
29. h t 5 26 27 28 29 30 31 32 ASCII t V w 2 5 8 Graphical User Interface GUI Your SCSI Switch is supplied with control software that is compatible with most recent Microsoft Windows operating systems to allow remote control of the switch Follow instructions on the included CD ROM to install the software Black Box Control Software Version 3 1 File Settings Configure SC120A R2 Window Help 2 x 2 SCSI Matrix Switch Port Assignments 1 2 6 0 B O 8 Bus Mode Smart Switching 2 a Ws Ports 0 SCSI Busy L Terminators SE Alarm Switch Without Show Bus Activity Meters Holdoff Figure 5 6 Screen shot of GUI control panel 2 X 2 SCSI MATRIX SWITCH 5 9 Connecting Multiple SCSI Switches Up to 32 SCSI Switches can be controlled by a single RS 232 serial interface To operate in this configuration set the serial ports to operate in daisychained mode In Figure 5 7 1 is RS 232 port 1 on each switch and 2 is RS 232 port 2 SCSI Switch SCSI Switch SCSI Switch SCSI Switch Box 1 Box2 Box 3 Box4 Figure 5 7 Multiple SCSI Switch configuration 5 10 Typical Application Figure 5 8 shows a sample application for the SCSI Switch Many other configurations are possible zr 10BASE T connection for LAN Server based Server switch control Switch
30. ies for this product of merchantability and fitness for a particular purpose Some states and provinces do not allow limitations on how long an implied warranty lasts so the above limitation or exclusion might not apply to you In no event shall the manufacturer or its authorized representatives be liable for any lost profits or direct indirect special incidental or consequential damages whether based on contract tort or any other legal theory No part of this manual may be reproduced copied or translated without prior written approval of the manufacturer or its authorized representatives The manufacturer and its authorized representatives reserve the right to revise this publication from time to time without being obliged to notify any person or organization of such revision We have prepared this manual for use by customers as a guide for the proper installation operation and maintenance of this equipment The illustrations specifications and other information contained in this document are the property of the manufacturer and its authorized representatives and any unauthorized use or disclosure of this information is prohibited The manufacturer and its authorized representatives make no warranty of any kind with regard to this manual We shall not be liable for errors contained herein or for incidental consequential damages in connection with the furnishing performance or use of this material BLACK BOX Cop
31. igital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la classe A prescrites dans le R glement sur le brouillage radio lectrique publi par Industrie Canada EUROPEAN UNION DECLARATION OF CONFORMITY This equipment complies with the requirements of the European EMC directive 89 336 EEC 2 X 2 SCSI MATRIX SWITCH 10 11 NORMAS OFICIALES MEXICANAS NOM ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD Todas las instrucciones de seguridad y operaci n deber n ser le das antes de que el aparato el ctrico sea operado Las instrucciones de seguridad y operaci n deber n ser guardadas para referencia futura Todas las advertencias en el aparato el ctrico y en sus instrucciones de operaci n deben ser respetadas Todas las instrucciones de operaci n y uso deben ser seguidas El aparato el ctrico no deber ser usado cerca del agua por ejemplo cerca de la tina de bano lavabo s tano mojado o cerca de una alberca etc El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante El aparato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante
32. ination 6 2 SCSI Installation Tips e Keep your SCSI chain short Official SCSI specifications limit the length of a SCSI chain to no more that 6 m 20 ft for single ended or 25 m 82 ft for differential Practical experience says the shorter the better The maximum length you should allow between devices is 3 ft 0 9 m e Never assign the same SCSI ID number to two devices residing on the same bus SCSI uses these numbers as addresses to ensure that information goes to the correct location Giving two devices the same address can result in lost information e Know that some SCSI ID numbers may be reassigned Internal boot hard drives are usually set to ID 0 while secondary hard drives are set to 1 Motherboards or host adapters are generally set to ID 7 e Always terminate the first and last devices on the chain Drives purchased specifically for internal use nearly always arrive with terminators installed If in doubt call the vendor you purchased the device from 2 X 2 SCSI MATRIX SWITCH gt If the last device on the chain has two SCSI connectors attach the cable to one and a terminator to the other Otherwise you ll have an open connector that may cause noise on the SCSI chain e Always turn off the power to your computer and SCSI devices before swapping cables or moving devices around SCSI cables contain sensitive data transmission lines and one or more live power wires e Turn on your SCSI devices befo
33. nable or disable each internal SCSI port terminator Refer to Chapter 4 for complete instructions on operating the LCD keypad You can selectively enable or disable any internal terminator to meet system configurations and requirements NOTES 1 For proper operation of any SCSI bus there must not be a hanging line or cable Termination should be enabled on active SCSI ports that are not connected through to another port 2 Connections can be made to either connector on the appropriate port 3 In Figures 2 1 and 2 3 Term shows where terminators should be installed CHAPTER 2 Introduction SCSI Switch Ports S w 1 H M A T R 1 X Figure 2 1 SC121A block diagram Termination Always Selectable Logic inati Component Selectable Termination p ae Selectable o Termination Termination Logic Component Selectable Termination Figure 2 2 SC120A R2 block diagram 2 X 2 SCSI MATRIX SWITCH SCSI Switch SC120A R2 Figure 2 3 Typical switch installation 3 Installation 3 1 What s Included 1 2x 2 SCSI Matrix Switch 1 AC power cord 1 10 ft 2 m DB9 male to DB9 female RS 232 cable 1 DB9 male to DB25 female RS 232 adapter 1 SCSI Matrix Switch control software CD ROM e This users manual If anything is missing or damaged call Black Box at 724 746 5500 3 2 AC Line Voltage You can connect the SCSI Switch to any AC input voltage between 95 and 2
34. or ports A B 1 and 2 respectively aa bb 11 and 22 1 representations of 8 bit hexadecimal values from 00 to FF where 00 represents 0 busy completely idle and FF represents 100 busy k SCSI Bus Inactivity to SCSI Report example command cr I cr report format 1111 2222 For ports 1 and 2 respectively 1111 and 2222 ASCII representations of 16 bit hexadecimal values that express the length of time in tenths of seconds that the port has been inactive not transmitting or receiving data For example DA73 0 x 4096 16 10 7 16 256 16 3 tenths of seconds 267 5 seconds 4 minutes 27 5 seconds 1 Yank on SCSI Reset line example command lt cr gt B2Y lt cr gt report none m Enable Disable Audible Alarm example command lt cr gt OAx lt cr gt ASCII 1 or 0 x 0 enable alarm 1 disable alarm report none n Set Serial Port Baud Rate example command lt cr gt OBxy lt cr gt x and y ASCII 1 or 0 0 COMI 1 COM2 y 0 9600 bps 1 19 200 bps report none o Set Mode of Serial Comm Port for RS 232 Port 2 example command lt cr gt OCx lt cr gt x ASCII 1 or 0 x 0 use Port 2 for daisychaining 1 use Port 2 as a second serial port report none Note This command has no effect if the LAN port is enabled which disables RS 232 Port 2 2 X 2 SCSI MATRIX SWITCH p Set Switch Device Number example command lt cr gt ODxx lt cr gt
35. ore complex than single ended and generally tends to be more expensive to implement CHAPTER 6 SCSI Technical Information 6 1 5 COMMON PROBLEMS The majority of problems encountered with SCSI bus installations are due to unbalanced or improper impedances on the SCSI bus transmission cables caused by varying manufacturers peripheral devices SCSI terminators compensate for these inherent impedance mismatches on a SCSI bus where peripheral devices such as hard drives CD ROM drives scanners or printers are used 6 1 6 PASSIVE TERMINATORS The most basic is a passive resistance style terminator This is usually supplied with peripherals and frequently does a poor job of balancing the impedance of the SCSI bus Passive terminators are resistor networks that allow signal voltages to vary with the load and terminator power supplied resulting in unstable signals from end to end on the bus and causing data errors Passive terminators are no longer recommended by ANSI for designs 6 1 7 ACTIVE TERMINATORS Active terminators add a voltage regulator to the circuit to regulate signal voltages with varying loads and terminator power allowing a consistent signal to be transmitted everywhere on the bus This in turn compensates for the varying bus lengths and signal loads All lines are terminated through 110 ohm resistors which are applicable to all narrow and wide single ended applications Active termination is the minimum ANSI recommended term
36. pecifications Physical Temperature 32 F to 149 65 Humidity Up to 90 relative humidity noncondensing Power 95 to 260 VAC 10 25 watts Size 4 5 H x 11 3 W x 9 7 D 11 4 x 28 7 x 24 6 cm Weight 5 1 Ib 2 3 kg 2 Introduction 2 1 About the SCSI Switch The 2 x 2 SCSI Matrix Switch is a high performance electronic crosspoint switch for use with the SCSI Small Computer System Interface bus This product enables two independent SCSI buses to be selected and electrically connected in any combination via internal electronic switching circuits The 2 x 2 SCSI Matrix Switch eliminates the need to swap and reconfigure SCSI cables and bus terminators when alternate system configurations are required In conjunction with the 2 x 2 SCSI Switch dual RS 232 serial interface a Graphical User Interface GUI allows the system administrator to remotely operate and control SCSI port configuration and termination report SCSI bus activity gather performance statistics and set internal temperature points for alarm notification Standard DOS or modem software can also be used to control the switch using simple ASCII control commands Up to 32 SCSI Switches can be connected together and controlled by one serial port 2 2 Features e Ultra2 Ultra and Fast SCSI compatible SC120A R2 is also Ultral60 SCSI a k a Ultra3 SCSI compatible e 80 MBps or SC120A R2 only 160 MBps throughput LVD e Easy to use LC
37. re you turn on the computer Some SCSI devices will not mount if they are not running when you power up your computer Shutting down your computer first and then the attached SCSI devices allows your system to completely flush itself 6 3 SCSI Interface Signal Descriptions A total of 18 signals are required for the SCSI interface These signals are described as follows BSY BUSY An OR tied signal indicating that the bus is being used e SEL SELECT An OR tied signal used either by an initiator to select a target or by a target to reselect an initiator C D CONTROL DATA A signal driven by a target that indicates whether Control or Data information is on the data bus True indicates Control I O INPUT OUTPUT A signal driven by a target that controls the direction of data movement on the data bus with respect to an initiator True indicates input to the initiator This signal is also used to distinguish between Selection and Reselection phases MSG MESSAGE A signal driven by a target during the Message phase REO REQUEST A signal driven by a target to indicate a request for a REQ ACK data transfer handshake e ACK ACKNOWLEDGE A signal driven by an initiator to indicate an acknowledgment for a REQ ACK data transfer handshake ATN ATTENTION A signal driven by an initiator to indicate the Attention condition RST RESET An OR tied signal that indicates the Reset condition
38. tors for up to 80 MB per second wide Ultra SCSI and Ultra2 SCSI computers and peripherals The maximum cable distance should not exceed 82 ft 25 m The SC120A R2 single ended low voltage differential switch contains 68 pin high density connectors for up to 160 MB per second wide Ultra SCSI Ultra2 SCSI and Ultral60 SCSI computers and peripherals Low Voltage Differential LVD When operating with LVD devices the SC120A R2 supports 160 MBps wide Ultra160 SCSI computers and peripherals The maximum cable distance for LVD should not exceed 82 ft 25 m total length Single Ended SE When operating with SE devices the SC120A R2 supports 40 MBps wide Ultra SCSI computers and peripherals The maximum cable distance for SE should not exceed 20 ft 6 m total length Black Box offers standard and custom SCSI cables for connecting the SCSI Switch to host devices and peripherals Call Black Box Technical Support for details 5 2 Internal Terminator Selection The SCSI Switch contains internal SCSI bus terminators for each port Termination is required at both ends of a SCSI bus for proper operation Each port can have its internal terminator enabled or disabled from the front panel display and keypad Refer to Figure 5 4 to select internal termination NOTE Data errors will result if more than two sets of terminators are installed on any SCSI bus see Figures 2 1 and 2 2 CHAPTER 5 Configuration and Operation SC12
39. yright 2002 Black Box Corporation rights reserved 1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746
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