Specifications

System Hardware
INTER-TEL
®
CS-5200/5400 ADMINISTRATOR GUIDE, ISSUE 1.0 – April 2005
Page 66 Off Premises Extensions (OPX)
Off-premises endpoint users gain access to the features by hookflashing (pressing and releasing
the hookswitch quickly) and entering feature codes.
Some telephone company OPX networks do not recognize certain single line endpoint ring
cadences used in the system. This incompatibility results in an inability to provide certain ring
signals to OPX endpoints. Because of this, the system is equipped with a endpoint option
(Extended Ring Cadences) which allows the ring cadences be altered for individual single line
circuits.
Table 12 describes the difference between standard and extended ring cadences for the various
types of single line devices used on Inter-Tel systems in the United States.
Table 12.
Off Premises Extension Ringing Cadences
SINGLE LINE DEVICE CADENCE TYPE DESCRIPTION
T1 OPX Standard IC Ring This is a repeating 2-second cadence that
rings twice. Each ring lasts 200 ms and is
separated from the next ring by 400 ms of
silence. The remaining 1.2 seconds is silent.
Extended IC Ring This is a repeating 6-second cadence that
rings twice. Each ring lasts 800 ms and is
separated from the next ring by 400 ms of
silence. The remaining 4 seconds is silent
Standard CO Ring This is a repeating 6-second cadence that
rings once for 2 seconds followed by 4 sec-
onds of silence.
Extended CO Ring Same as Standard CO Ring cadence.