Owner`s manual

14
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The modem should be connected to the COMPOSITE EIA-232 port on the
back panel of the TX102 and the unit programmed to operate with a Line
Type of Modem (see
Section 5.8 ). The TX102 composite port has an RJ-45
modular connector. Most modems do not have RJ-45 modular connectors.
Therefore, adapters are required to convert the modem's DB-25 connector
to a module connector. BayTech has a complete line of RJ-45 adapters that
will make your installation quick and trouble free. See
Appendix A.4 for the
recommended adapter/cable pinouts.
Figure 4 and Figure 5 are drawings of
an RJ-45 receptacle and plug. The pin assignments are given.
Figure 4.
RJ-45 Receptacle
Figure 5.
RJ-45 Plug
The TX102's composite port uses the following signals:
TX102 EIA-232 COMPOSITE PORT RJ-45 PIN/SIGNAL DEFINITION
Pin Signa
l
Direction Description
1 DTR Output Data Terminal Ready. +12 volts when power is applied to
Telplex.
2 GND ---- Signal Ground
3 RTS Output Request To Send. +12 volts when power is applied to Telplex.
4 TX Output Transmit Data
5 RX Input Receive Data
6 DCD Input Data Carrier Detect. Controlled by external modem.
7 GND ---- Signal Ground
8 CTS Input Clear To Send. Telplex transmit enabled when +12V. Internally
enabled if no connection.