Instruction manual

Features
Mode Differences
Hybrid/PBX Mode
The Hybrid/PBX mode can only be used in a Limited Centrex configuration.
Prior to Release 2,0, a switchhook flash can be sent to the Centrex only when
the Prime Line is terminated on a Personal Line or Pool button. (Prime Lines can
be shared.) Accessing the same Prime Line through an SA button, does not
allow the switchhook flash to be sent to the Centrex.
In Release 2.0 and later, Centrex lines active on an SA button (including a
Shared SA button) can use Recall or switchhook flash.
DID, TIE, WATS, and T1 lines can be used in pools. They can only be used as
Personal Lines with Centrex Service in Key and Behind Switch modes.
Key Mode
The Key mode can only be used in a Limited Centrex configuration.
Key mode avoids the problem of each station requiring a Prime Line (or shared
Prime Line) to make Centrex calls. It allows the use of an ICOM button for
access to Centrex lines. It also allows the use of DID, TIE, WATS, and T1 lines
as Personal Lines.
Prior to Release 2.0, a switchhook flash can be sent to the Centrex only when
the line is terminated on a Personal Line. Accessing the same line through an
ICOM button does not allow the switchhook flash to be sent to the Centrex.
(Prime Lines can be shared.)
In Release 2.0 and later, Centrex lines active on an ICOM button can use Recall
or switchhook flash.
Behind Switch Mode
For Full Centrex configuration, the communications system must be
programmed in Behind Switch mode.
Behind Switch mode does not support MERLIN MAIL, the Call Accounting
System, or the Call Management System. These applications are supported
only in Key and Hybrid/PBX mode.
Full Centrex service supports only loop-start facilities. While use of non-loop-
start lines will not be blocked by the communications system, they have the
potential for causing dialing errors. Even random use of non-loop-start modules
such as E&M boards will throw off the default line assignments. If non-loop-start
boards must be used, they must be positioned after the last loop-start line
module, or Prime Lines on later modules may be assigned incorrectly. If the DS1
module is used, it must be placed after all other loop-start boards on the system
so that default line assignments on the communications system are not affected.
PRI trunks are not supported in Behind Switch mode.
Centrex Operation 89