Voice Circuits - Coastcom D/I Mux III System User Manual

Chapter 3. Installation
Figure 3-15. Voice/Data Jumpers

Voice Circuits

The 8-slot Universal and 12-slot D/I Mux III shelves have three 50-pin VF connectors, and the 24-
slot shelf has six 50-pin VF connectors. They are designated P1, P2, and P3 on the 8-slot and
12-slot shelves, and P1, P2, P3, P4, P5, and P6 on the 24-slot shelf. These connectors provide
access to tip (T), ring (R), tip 1 (T1), ring 1 (R1), and Earth and Magnet (E&M) signalling leads.
Note: Use the DB-25 connectors to connect a voice card using types II or III E&M signalling. Types II
and III signalling require signal ground and battery not available on the 50-pin VF connector.
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