Lucent Technologies MERLIN LEGEND Release 7.0 Feature Reference page 208

MERLIN LEGEND Communications System Release 7.0
Feature Reference 555-670-110
Features
Centrex Operation
Limited Centrex
With limited Centrex service, users depend principally on the communications
system's features, but a limited number of prime lines can be used to access the
Centrex system. There are two key reasons for selecting limited Centrex:
Centrex lines/trunks may be less expensive than other lines.
Different users may have different needs for telephone service, so that
some users benefit more from Centrex, while other users benefit more from
direct use of the communications system.
In the limited Centrex configuration, some extensions may have prime lines, while
other extensions access the prime lines through a pool. Extensions can also be
assigned ground-start, tie, or DID lines, which is not possible to do with full
Centrex. In Hybrid/PBX mode, if your telephone does not have a prime line, you
can use a Pool button to access Centrex facilities or an SA button to access
pooled facilities by dialing an access code. Once connected to a pool, you can dial
other Centrex extensions or dial an access code for outside calls. You can make
outside calls made by using an SA button to access a pool require two access
codes for outside calls: one for the pool and one for outside lines on Centrex.
For limited Centrex operation, the communications system must be in Key or
Hybrid/PBX mode. The total system operates on three levels, as shown in
5. The extension user must be aware of the level where he or she is when making
a call or activating a feature.
Figure 5.
Central Office Central Office al Office
(External Calls) (External Calls)
Centrex Service Centrex Service
• 4-digit Centrex Calls • 4-digit Centrex Calls
• Use of Centrex Features • Use of Centrex Features
MERLIN LEGEND
Communications System
• 2, 3, or 4-digit Numbering Plan
• Hybrid/PBX Mode Features
Limited Centrex Service
Issue 1
April 1999
148
Figure