Remote Group Interface (Rgi) Installation; Central Location Connections; Remote Location Connections; Figure 73. Remote Group Interface Block Diagram - AT&T System 85 Installation And Test

REMOTE GROUP INTERFACE (RGI) INSTALLATION
The RGI feature provides for small groups of voice and/or data terminals at a remote
location connected directly to the system switch through DS1 facilities. Because this
configuration involves only small numbers of DS1 port interface, there are no switch
considerations. Each remote port group is connected to a DS1 carrier in a port cabinet at
the central location through a pair of dedicated RGI circuit packs. The ANN15B is located
at the central location, and the ANN16B is located at the remote location in the Remote
Group Housing. The Remote Group Housing also contains the required conventional port
circuits.
A block diagram of the RGI feature is shown in Figure 73.
DS-1/MFAT
CARRIER
AUXILIARY
CABINET
1
Ti CARRIER,
OPTIONAL
CROSS-
CONNECT
FIELD
TO TERMINAL
OR
REMOTE GROUP HOUSING
ANN 15B
CE
CEM ANN168
1
1
CM
COM
SN2288, SN238,
SN2708 OR ANN178
TELEPHONE
SET
CSU
CSU
LESS THAN
100 MILES
CENTRAL SYSTEM 85
LOCATION
<- REMOTE LOCATION
Figure 73. Remote Group Interface Block Diagram
CENTRAL LOCATION CONNECTIONS
Remote Group Interface requires that an ANN15B circuit pack be installed in the J58888N
DS1/MFAT carrier at the System 85. The terminations and connections for this circuit pack
are in AT&T System 85 Installation (555-103-104).
The remote group uses DS1 signaling via DS1 interface ANN15B from the central location to
the DS1 interface ANN16B at the remote location. The DS1 connections are in AT&T
System 85 Installation (555-103-104).
REMOTE LOCATION CONNECTIONS
The Remote Group Housing (RGH) can be wall mounted or set on a table or shelf. If the
housing is wall mounted, refer to the next paragraph. The RGH must be mounted in a
position where both sides are not blocked. Air vents are in each side; proper airflow is
critical. If the Remote Group Housing is equipped with an ANN17B circuit pack, the
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