Owner`s manual

M SERIES DAC

CABLING

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CABLING

BASE UNIT CABLING

SERVICE PORT/SERVICE MODEM CABLING

If you have a unit equipped with a service modem, the cable required to connect the

telephone interface to the modem port is a standard 4-pin modular straight-through

cable.

CAUTION: Use caution when installing or modifying telephone lines.

Never install telephone wiring during a lightning storm. Never install

telephone jacks in wet locations unless the jack is specifically designed for

wet locations. Never touch uninsulated telephone wires or terminals unless

the telephone line has been disconnected at the network interface.

The service port has an RJ-45 modular connector. Most serial computers and

terminals do not have modular connectors. Therefore, adapters are required to

convert from DB-25 or DE-9 connectors to modular connectors. The service port

uses the following communication signals:

SERVICE PORT 8-PIN MODULAR EIA-232 PIN/SIGNAL DEFINITION

PIN SIGNAL DIRECTION DESCRIPTION

1 DTR Output Data Terminal Ready. Enable/disable receiving characters

GND

--------

Signal Ground

3 RTS Output Request To Send. +12 Volts when unit is powered on.

4 TX Output Transmit Data

5 RX Input Receive Data

6 DSR Input Data Set Ready. Not used as a handshake line.

7 DCD Output Data Carrier Detect. +12 Volts when unit is powered on.

8 CTS Input Clear To Send. Enable/disable transmitting characters

An adapter is required to connect an IBM PC to the service port. The 9FRJ45PC-3

and 25FRJ45PC-3 adapters are used for this connection. The pinout for these

adapters is displayed in Appendix D.