Nitsuko 1232 Instruction And Installation Manual page 286

Installation of 3CIDU-A1 Unit (TX-Z 308)
4. After installing the 3CIDU Unit, connect the Trunk line which provides Caller-ID service as
illustration. Make connection from PTT lines to one of the connector labeled COCN () on the
3CIDU Unit. A maximum of 3 CO/PBX lines can be installed as Caller-ID line.
5. Connection between 3CIDU-A1 Unit and 308M-A1 Unit as the illustrations.
¾ 7-1-3 ¾