Installing And Programming The Analog Terminal
Interface On The Digital Communications System
1.0 Introducing The Analog Terminal Interface
This publication describes the features, applications, installation, and specifications of the Comdial Analog
Telephone Interface (ATI-D-1PT). The ATI-D-1PT is a multipurpose, on-premise accessory for the digital
communications system. It provides the following features:
•
INDUSTRY-STANDARD TELEPHONE (IST) INTERFACE -This feature adapts most industry-standard
telephone (IST) devices to the digital station board of the DXP system. The ATI-D-1PT will accept both tone
(DTMF) and pulse (rotary) dialing from these devices.
CAUTION
The ATI-D-1PT by itself does not support any off-premise service. Never connect the ATI-D-1PT to a
telephone company-supplied line unless an acceptable OPX long loop adapter is installed. Refer the
installation section for adapter installation instructions.
The ATI-D-1PT is housed in a self-contained wall mountable metal enclosure. The ATI-D-1PT receives its power
from the digital communications system through the station port connection. the ATI-D-1PT contains an internal
ringing generator to generate a ringing signal for an IST and high quality, low-loss, balanced, telephone
transmission circuitry that supports one IST input.
Connection between the ATI-D-1PT and a common equipment digital station port requires one single-pair cable
(two-wire). Connection between the external analog IST equipment and the ATI-D-1PT requires Another single
pair of wires. The ATI-D-1PT provides modular connectors to allow quick connections.
The ATI-D-1PT circuit will drive a load with a maximum ringer equivalence number (REN) of 2.0 thus allowing
more than one IST connection at each interface input. Check the REN number of the connected IST equipment so
as not to exceed the capacity of the ATI-D-1PT. Improper operation may result if the REN maximum of the
ATI-D-1PT is exceeded.
The ATI-D-1PT supports a wide variety of IST equipment such as 500 and 2500-type telephones, cordless
telephones, answering machines, FAX machines, and data modems.
R
This manual has been developed by Comdial Corporation (the “Company”) and is intended for the use of its customers and service personnel. The information in this manual is subject to change
without notice. While every effort has been made to eliminate errors, the Company disclaims liability for any difficulties arising from the interpretation of the information contained herein.
The information contained herein does not purport to cover all details or variations in equipment or to provide for every possible contingency to be met in connection with installation, operation, or
maintenance. Should further information be desired, or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, contact Comdial, Inside Sales Department,
Charlottesville, Virginia 22906.
Printed in U.S.A.
IMI89–208.02
10/95
