Connecting The Stations - Comdial DSU II System Manual

IMI66–132
2.5

Connecting The Stations

The DSU II digital telephone system supports the operation of proprietary Comdial telephones.
The J0408, J0816 and J1632 common equipment supports the installation of up to eight, 16, or
32 telephones, respectively. Add-on expansion modules are available to expand the station
capacity of the systems. You can add one expansion module to the J0408, and two expansion
modules to the J0816 and J1632. The JM408 expansion module provides interface for eight
proprietary stations (plus interface for four lines) while the JM008 expansion module provides
interface for eight industry-standard devices.
Connections between the common equipment and the stations are typically via type 66M-xx
connector blocks which are cable connected to the common equipment's 50–pin male connector.
The connector block is, in turn, wired to modular jacks that accept the modular line cord
connected between it and the telephones.
The maximum distance allowed from the common equipment to the stations is per the following
list:
• Multiline Telephones—1000 feet using #24 gauge, twisted-pair cable or 2000 feet using
#22 gauge cable
When installing the system telephones keep in mind that each station port supports only one
proprietary telephone and the system does not allow you to bridge two stations to a single
modular jack.
Always route station wiring a minimum of 12 inches from any other parallel wires or electrical
devices. If electrical noise or RF energy is at a high level, you may need to use shielded cable
with the shield connected to the cabinet ground lug.
2 – 16 Installing The DSU II Digital Telephone System
DSU II Digital Telephone System