AT&T System 25 - Manual (Page 117)

INSTALLATION
Single-Line and 7300H Series Voice Terminals With
Associated ADUs
See Figures 2-39 and 2-40.
1.
2.
3.
4.
5.
6.
Unpack each voice terminal and ADU and examine them for damage.
Arrange 7300H Series terminals and single-line terminals with
appropriate ADUs (see Note).
Note: The Z3A1 ADU is equipped with a male RS-232C
connector, and the Z3A4 ADU is equipped with a
female RS-232C connector. The choice depends on
the data terminal since both ADUs are used with
single-line voice terminals.
At the workstation, connect the ADU’S cable to the RS-232C
receptacle on the data terminal. 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.
Connect the voice terminal to the modular jack labeled Telephone on
the ADU.
Connect a D8W-87 modular cord between the jack labeled Wall Jack
on the ADU and the wall jack.
For 7300H Series terminals, use a D6AP Cord to connect a KS-
22911 Power Unit to the power jack on the Z3A5 ADU.
2-92