AT&T 555-230-223 manual Connecting a Terminal to the MFB via 7400 Data Sets

SWITCH

ALARM

BOARD

MULTI-

FUNCTION

ALB

CABLE

ADMIN/

PORT B

MFB

Y-CABLE

GROUP 311

CABLE

7400A

(SEE

SITE-SPECIFICNOTE)

NETWORK 7400B CONNECTIONS

BOARD

POWER

SUPPLY

MAIN/

PORT A

POWER SUPPLY

NOTE: NULL MODEM IS REQUIRED WHEN

CONNECTING TO 715 BCT DCE PORT

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