AT&T System 25 - Manual (Page 142)

INSTALLATION
INSTALL MUSIC-ON-HOLD INTERFACE
Note: Use of equipment that rebroadcasts copyrighted music or
other material may be required to obtain a license from a
third party such as ASCAP or BMI.
FCC-Registered Music Source Interface
The music source is connected to a ZTN78 CP through the SIP (see Figure
2-52).
1.
2.
3.
4.
Using an octopus cable, connect the CP to an 858A Adapter at the
SIP.
Using inside wire, connect T and R leads on the other side of the
858A Adapter to the PT and PR terminals on the Music-on-Hold
(MOH) interface (KS-23395).
Connect the T and R terminals on the MOH interface to terminals 1
and 2 on a 103A Connecting Block.
Connect the music source to the 103A block using a D4BU-87
modular cord.
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