Table of Contents
Advertisement
INSTALLATION
ELECTRICAL
CONNECTIONS
Equipment
Connection
2-14
Switches S6-1, S6-2, and S6-3 were used for Supervisory port data rate, but
now only switches S6-1 and S6-2 are used for this, and their settings are
different:
19.2 K
BDA
ON
BDB
OFF
Switch S6-3 and switch S4-6 now control the use of PMC-100s and MAU-
1As. To enable the use of PMC-100s, turn ON switch S6-3 (switch S4-6 be-
comes a CSU address switch). To enable the use of MAU-1As, turn OFF
switch S6-3 and turn ON switch S4-6. To disable the use of PMC-100s and
MAU-1As, turn OFF both switches.
Switch S6-6 was used for Supervisory port character format, but now con-
trols master/slave operation. The Supervisory port character format selec-
tions are now limited to the following:
8/N/1
CF1
OFF
CF2
OFF
Switch S4-6 controls the use of MAU-1As (as before) when switch S6-3 is
OFF. It is a CSU address switch when switch S6-3 is ON.
Switch S4-7 was not used, but now is a CSU address switch when switch
S6-3 is ON.
Switch S4-8 controlled master/slave operation, but now is a CSU address
switch when switch S6-3 is ON. Master/slave operation is now controlled
by switch S6-6.
Switch S7-4 still controls Line Build-Out, but option selection is reversed
(the OFF position now selects manual Line Build-Out and the ON position
selects automatic Line Build-Out).
Refer to Publication No. 048R137-800 for detailed discussion of MAU-1A
applications.
The following paragraphs describe the customer equipment, network in-
terface, Supervisory terminal, and primary power connections to the
DataComm 551.
Connect the customer equipment (T1 multiplexer) to the DataComm 551 as
described below.
Unless otherwise noted, the customer equipment interface is a 25-pin fe-
male subminiature-D connector located on the rear panel, and you should
use GDC cable P/N 024H520-XXX (use GDC cable P/N 027H324-002 when
9600
4800
2400
OFF
OFF
ON
OFF
ON
ON
7/N/1
7/O/1
7/E/1
OFF
ON
ON
ON
OFF
ON
Advertisement
Table of Contents
