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Modem 34336
For dialup applications:
• Use the supplied two-conductor crossover cable to connect the Modem
to the telephone-line modular wall jack. Plug the eight-pin connector
(RJ-45) of the cable into the rear-panel jack labeled TX DIAL. Then,
plug the six-pin connector (RJ-12) into the telephone jack.
NOTE
Do not bundle the telephone and RS-232 cables together.
• Optional: For manual-dial operation, or if you want to use the telephone
line for voice transmissions (when the Modem is not operating in data
mode), connect a standard telephone into the rear-panel jack labeled
PHONE.
For leased-line applications:
• Use the supplied four-conductor cable to connect the Modem to your
leased-line modular wall jack. Attach the six-pin modular connector
(RJ-12) to the rear-panel jack labeled LEASED LINE. Attach the eight-pin
connecter (RJ-45) of the cable into the line’s terminal block.
The same cable is used whether you have a 4-wire or 2-wire leased line. In
a 4-wire application, the green and red wires are the TRANSMIT pair, and
the yellow and black wires are the RECEIVE pair. When the cable is
connected to a 2-wire line, only the green and red wires are used.
NOTE
Do not bundle the telephone and RS-232 cables together.
2.1.5 J
UMPERS
For most applications, you will not need to reset internal jumpers. However,
jumpers must be reset for the following situations:
• If you are connecting frame ground to signal ground.
• If you are switching from A/A1 control to MI/MIC control.
• Change the function of TIA/EIA pin 25 (the default is test mode
indicator).
• If you use the Modem in a DC rack enclosure.
For detailed jumper information, see Appendix D.