Instruction manual

Installation
50 025-9416
Telco
Terminal Block
Adapter
Model 640
rear panel
Radio Station Equipment
(Co-located transmitter, Tx link controller,
etc.)
Figure 17. System Configuration with the Optional Installation Interface Assembly
66-Type Punchdown Block Installation
The other method of installation requires a 66-type punchdown block (Part No. 802-0093 or 802-
0263) and a female 25-pair cable (Part No. 709-0004) to split the radio station and telco wiring
out of the Model 640’s RJ21 connector. This interface method is more flexible than the optional
installation interface assembly, but it requires more extensive knowledge of telephone line types
and signaling formats.
Figure 18 illustrates the basic connections with the 66-type punchdown block.