AT&T DEFINITY 555-230-223 - Manual (Page 44)

Installation
POWER
SUPPLY
GROUP 311
CABLE
SWITCH
ALARM
BOARD
MFB
Y-CABLE
ADMIN/
MAIN/
MULTI-
BOARD
FUNCTION
ALB
CABLE
(SEE
NOTE: NULL MODEM IS REQUIRED WHEN
PORT B
PORT A
CONNECTING TO 715 BCT DCE PORT
7400A 7400B
POWER
SUPPLY
NOTE) SITE-SPECIFIC
NETWORK
CONNECTIONS
Figure 2-12. Connecting a Terminal to the MFB via 7400 Data Sets
NOTE:
You may use two 7400A data sets in this configuration. However, because
the 7400B data set is easier to set up and use, it is the one described in
this procedure on the terminal side. (The DEFINITY LAN Gateway system
side of the configuration requires the 7400A.) If you are using two 7400A
data sets, connect the second 7400A the same as the 7400B, but set the
options as described in ‘‘Using the Front Panel’’ in
7400A Data Module
User’s Manual, 555-020-706.
1. Make sure the EIA connector board (located under the top panel) is set to
DCE (the factory default). If not, unplug the card and turn it around to the
DCE setting (see the
7400A Data Module User’s Manual, 555-020-706,
for details).
2. Connect the 7400A data set to the DEFINITY LAN Gateway system MFB.
a. In the room where the switch and DEFINITY LAN Gateway system
are located, attach one end of an ED-1E434 Group 311 cable to
the RS-232 connector labeled PORT B on the MFB Y-cable. Attach
the other end to a 7400A data set.
b. Plug one end of the modular cord (supplied with the data set) into
the LINE connector on the 7400A data set and plug the other end
into a telephone outlet.
Issue 1 January 1996 2-25