AT&T System 25 - Manual (Page 131)

INSTALLATION
On-Premises Digital Switched Connection
To access a CPU/Memory port through a switched connection, the port is
connected to a port on a TN726 CP and assigned a Data Dial Code (DDC).
See Figure 2-47.
The peripheral equipment can be either stand-alone or associated with a
voice terminal. The peripheral equipment is connected to another port on a
TN726 CP. To access the CPU/Memory port, the peripheral equipment must
dial the DDC of the CPU/Memory port.
Note: Figure 2-47 shows a 858A SIP Adapter to provide the
1.
2.
3.
4.
5.
6.
7.
8.
9 .
10.
building wiring termination. A Z210A2 Adapter can also be
u s e d .
Connect RS-232C plug on the peripheral equipment to the RS-232C
connector on a Z3A1 or Z3A4 ADU. Always tighten the screws or
other fasteners on this connection. If these connections are not
properly fastened, the Data Line CP port may be falsely busied out.
lf the peripheral equipment requires supplementary power, continue
with Step 3; otherwise, go to Step 8.
Connect the ADU to the building wiring with a D8W-87 modular cord
plugged into a 400B2 Adapter.
Plug the 400B2 Adapter into the wall jack.
Plug one end of a D6AP Cord into the 400B2 Adapter and the other
end into a 248B Adapter.
Connect the 248B Adapter to a 2012D supplementary power supply.
Plug the 2012D Power Supply into an ac outlet.
At the SIP, connect the building wiring termination to an 858A
A d a p t e r .
Using an octopus cable, connect the modular side of the adapter to
a port on a TN726 CP.
Locate the Z210A2 Adapter connected to the desired CPU/Memory
port. Connect a D8W-87 modular telephone cord to the jack on that
Z210A2 Adapter.
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