AT&T System 25 - Manual (Page 32)

INSTALLATION
Adapters
The adapters shown in Figure 2-3 are used at the SIP.
Z210A2 or 858A Adapters
These adapters connect the building wiring (station runs) to the station port
circuit packs (CPs) located in the system cabinets (through octopus cables).
As many as 40 of these adapters may be required for a maximum size
system, Any combination of the adapters can be used, depending upon the
type of building wiring.
The port side of the adapters consists of six 8-pin
modular jacks. The station side of the adapters is equipped as follows:
●
Z210A2—Six 8-pin modular
modular plug-ended D-inside
must be installed at the top
connections for the System
Tape Unit (DTU), etc.
jacks used for terminating 4-pair
wire (DIW). One of these adapters
of column A on the SIP to provide
administration Terminal (SAT), Digital
●
858A—Six 11 O-type 8-pin wiring blocks used for terminating 4-pair
DIW.
WP90851, L1 Y-Adapter
This adapter separates voice and data pairs that are run over
cable for connection through octopus cables to the System the same 4-pair
25 port circuits.
This adapter plugs into the port side of either of the two adapters described
above. It has a DATA and a VOICE modular jack. The DATA jack connects
to a TN726 Data Line port circuit pack. The VOICE jack connects to a port
circuit on a Tip Ring Line, Analog Line, or ATL Line circuit pack.
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