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Network Interface
Connection
the existing customer equipment T1 cable is terminated in a DB15P male
connector). The DataComm 551 requires that the signals be connected to
the pins as shown in the appropriate figure.
DataComm Enclosure Installation
Connect the customer equipment T1 aggregate to the DataComm 551 by
means of the connector labeled Business Equipment, as shown in Fig-
ure 2-6.
DataComm FourPak Enclosure
Connect the customer equipment T1 aggregate to the DataComm 551 by
means of the connectors labeled BUSINESS EQUIP 1 through BUSI-
NESS EQUIP 4, as shown in Figure 2-7.
DataComm Modem Shelf Installation
Connect the customer equipment T1 aggregate to the DataComm 551 as
shown in Figure 2-8.
GDC TriPak Shelf Installation
Connect the customer equipment T1 aggregate to the DataComm 551 by
means of the connectors labeled BUSINESS EQUIP A through BUSI-
NESS EQUIP C, as shown in Figure 2-9.
Universal System Shelf Installation
Connect the customer equipment T1 aggregate to the DataComm 551 by
means of the connectors labeled BUSINESS EQUIP 1 through BUSI-
NESS EQUIP 4, as shown in Figure 2-10.
Connect the network (T1 line) to the DataComm 551 as described below.
Unless otherwise noted, the network interface is an RJ48C jack located on
the rear panel.
For other than a DataComm Modem Shelf installation, you must use ei-
ther GDC cable P/N 022H024-XXX (RJ48C plug-to-plug) or 022H021-XXX
(RJ48C plug-to-terminal lugs) to connect the network to the CSU. For a
DataComm Modem Shelf installation, you must use either 027H242-X04
(and coupler 209-038-002) or 022H025-XXX (RJ48C plug-to-terminal lugs).
Using any other cable may cause damage to the CSU or the network.
Cables 022H024-XXX and 027H242-X04 are labeled NETWORK and CSU
to indicate where each end is used. The pinouts for the network end of
these cables are listed in the appropriate figure.
If you connect two CSUs back-to-back (a direct cable
connection with no T1 line), do not enable automatic
Line Build-Out for both of them.
NOTE
INSTALLATION
2-15
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