Overview; System Technology; Optional Equipment - Comdial DX-80 Installation & Maintenance Manual

1. Overview

The Comdial DX-80 is a fully digital hybrid key telephone system. The DX-80 utilizes "Loop Start" central office
(Telephone Company) line interfaces and a mix of analog and digital extension ports to provide office
communications and connectivity to the Public Switched Telephone Network. The DX-80 delivers a vast array of
office productivity features and telephone use enhancing features including Caller Identification (required Telephone
Company subscription) in the standard package. Unlike most systems that support Caller ID, the DX-80 supports
Caller ID to DX-80 proprietary digital extensions and to third-party, Caller ID capable analog devices (cordless
telephones, etc.)
Although most features are standard, the DX-80 provides for several optional features to further enhance office
communications. Built-in voice processing integration packages are: Automated Attendant, Cost Effective Flash-
Based Voice Mail/Auto Attendant and Cost Effective, fully-featured Hard Drive-based Voice Mail/Auto Attendant. The
DX-80 platform allows the application of these voice processing platforms without loss of valuable system port
resources.
The DX-80 is comprised of an application configured, expandable Key Service Unit (KSU) platform. There is one fully
featured Digital Executive (display) Telephone that delivers access to all system functionality. The system
architecture provides an expandable interface for digital port growth and analog port growth. The basic configuration
supports both device types. (Analog ports might be used for plain old telephones, fax machines, modems, etc.) The
DX-80 is designed to meet the telecommunications needs of small to medium business offices.

System Technology

The DX-80 incorporates state of the art digital technology for voice switching and call processing utilizing Pulse Code
Modulation and Time Division Multiplexing (PCM/TDM). The DX-80 is a non-blocking switch, with no loss or
degradation of voice signals. The system is stored-program control and utilizes a 16-bit, 20 MHz main
microprocessor and peripheral devices (extensions and CO lines) processors in a distributed processing
configuration. Memory consists of 640K bytes of ROM (Read Only memory) and 384K bytes of RAM (Random
Access Memory) (RAM is lithium battery protected).
The DX-80 is factory equipped as follows:
KSU1 (PN 7201) with the following
•
Eight (8) digital extension ports
•
Four (4) analog device ports
•
Four (4) CID ready CO Line ports
•
Two music source inputs (can be assigned as desired to CO lines for hold music/messages
•
One power failure port (CO Line 1)
•
One control contact (LBC, Gate, External Page Control)
•
One external paging equipment interface
•
Two serial ports
•
PC-DBA programming
•
SMDR (Station Message Detailed Recording).

Optional Equipment

The optional equipment is listed below:
KSU2 (PN 7202) used to expand the system capacity beyond KSU1 limits. Includes eight (8) digital
extension ports, four (4) CO line ports and one power failure port (CO line circuit 1).
DPM8 (PN 7220) (Digital Port Module - 8 circuit) (installs into KSU1 or KSU2)
APM4 (PN 7230) (Analog Port Module - 4 circuit) (installs into KSU1 or KSU2)
COM4 (PN 7210) (CO line Module - 4 circuit with one power failure port on first CO line circuit) (installs into
KSU1 or KSU2)
MDM (PN 7249) (Modem Module) (for use with off-site programming) (installs into KSU1 only)
P7290 IMM
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NSTALLATION AND AINTENANCE
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ANUAL