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INSTALLATION
MODEM
APPLICATION
2-24
Unless otherwise noted, the Supervisory port is a 25-pin EIA/TIA-232-E
male connector located on the rear panel, and the terminal interface ca-
ble must be terminated on the DataComm 551 end in a DB25S connector
and on the other end in a connector compatible with the Supervisory ter-
minal. The DataComm 551 requires that the signals be connected to the
pins as shown in the appropriate figure.
DataComm Enclosure Installation
Connect the Supervisory terminal to the DataComm 551 by means of the
connector labeled Auxiliary, as shown in Figure 2-6.
DataComm FourPak Enclosure
Connect the Supervisory terminal to the DataComm 551 by means of the
connectors labeled AUXILIARY 1 through AUXILIARY
Figure 2-7.
DataComm Modem Shelf Installation
Connect the Supervisory terminal to the DataComm 551 as shown in Fig-
ure 2-8.
GDC TriPak Shelf
Connect the Supervisory terminal to the DataComm 551 by means of the
connectors labeled AUX-A through AUX-C, as shown in Figure 2-9.
Universal System Shelf Installation
Connect the Supervisory terminal to the DataComm 551 by means of the
connectors labeled AUXILIARY 1 through AUXILIARY
Figure 2-10.
In an application using modems for access to the Supervisory port from a
remotely-located Supervisory terminal, such as illustrated in Figure 2-12,
one modem is required for the terminal and one for each CSU.
At the service center:
• Connect the modem to the Supervisory terminal as shown. The inter-
face cable must be terminated on the modem end in a DB25P connector
and on the other end in a connector compatible with the Supervisory
terminal. The Supervisory port requires that the signals described
above be supported. For the modem, select XOFF/XON flow control (if
applicable, to prevent losing data when the modem is operating at a
slower speed than the terminal).
4, as shown in
4, as shown in
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