O
VERVIEW
DX-120 Installation and Maintenance Manual
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DPM16 (Digital Port Module - 16 Circuits)
The DPM16 module expands the DX-120 system capacity of digital ports DET (Digital Executive Telephones) and
DSS consoles. Each digital port is comprised of a proprietary octal ASIC transceiver. There are three data
channels in operation at each digital port via the octal transceiver. One channel is used for call processing control
of digital terminal functions/operations and two channels are used for the digital voice channel requirements. The
DPM16 is controlled directly from the 408M/E. Therefore, there is no heartbeat LED located on the DPM16.
DPM16 (Digital Port Module - 16 Port)
•
Each digital station interface is protected against circuit wiring shorts by an over-current protection Polyswitch.
The digital station circuit requires only one cable pair to operate and is not polarity sensitive.
•
Physical connection of digital port terminals (DET and DSS) to the DPM16 module is made through
convenient RJ-12 connectors along the bottom edge of the module.
Summary of Contents for comdial DX-120
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