MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 130Centrex Operation
To use the features available through Centrex, dial a Centrex feature code from a
touch-tone telephone or analog data device. Some features must be programmed
for customers by the telephone company at the central office (CO). The system
can be configured for either full or limited Centrex service, as described in the next
two sections.
In Release 6.0 and later systems, outside calls arriving on Centrex analog loop-
start facilities can be forwarded to an outside number using the Centrex Transfer
via Remote Call Forwarding feature. This communications system feature allows
remote forwarding of calls on the same line that received them, saving system
resources by freeing the line for another call. For additional information, see
“Centrex Transfer via Remote Call Forwarding” on page 133
and “Forward and
Follow Me” on page 289.
NOTE:
The system supports Centrex on loop-start lines only, not on ground-start
or ISDN facilities.
Full Centrex 3
Full Centrex requires that each extension have a direct Centrex line/trunk (
prime
line
) to the CO. Full Centrex can also be used when only some extensions have
prime lines, but the extensions without prime lines have limited ability to use
Centrex features. Prime lines can be shared among extensions.
The prime line allows users to dial outside numbers directly after dialing an
access code (usually
). For this reason, any calling restrictions for the extension
must be programmed by the telephone company.
The prime line is also used to call other 4-digit Centrex extension numbers that
may be located at different sites served by the same telephone company. The
communications system’s intercom lines are used to dial other extensions in the
communications system.
With full Centrex, users can send a switchhook flash by using the Recall or Flash
button. The fixed-function buttons (Hold, Drop, and Transfer) control Centrex
features rather than communications system features. Additional buttons can be
programmed for communications system use. The communications system does
not intercept or respond to Recall or fixed-function button signals. See
“Recall/Timed Flash” on page 567
for additional information.
For full Centrex operation, the system must be in Behind Switch mode. A full
Centrex configuration operates on three levels, as shown in Figure 4
. The
extension user must be aware of the level where he or she is when making a call
or activating a feature.
To Next Page
Loading...
