Idle Line Preference; Industry-Standard Telephone Support - Comdial DSU II Manual

IMI66–132

Idle Line Preference

When a station is programmed for idle line preference, it will automatically be connected
to the first assigned idle line. The system can be programmed on a per station basis to
enable idle line preference. When idle line preference is enabled, taking the handset
off-hook will automatically connect the station to any assigned line that is idle and has
been arranged for this feature. The line button will not have to be pressed. If this feature
is used in conjunction with prime line automatic, the user will be given prime line first
when going off-hook. An idle line will be given if the prime line is in use. The station
class of service programming enables this feature on a per station/per line basis.
See also, Line Features.
Impression Telephone Support
The digital telephone system supports the use of Comdial Impression digital telephones.
This new proprietary digital telephone style is available in the following models:
2022S–FB and –PT
2122S–FB and –PT
2122X–FB and –PT
2101N–FB and –PT
DU32X–FB and –PT
Impression telephones are completely compatible with all of the features provided by the
digital telephone system and require no unique programming.

Industry-Standard Telephone Support

The digital telephone system supports the use of an industry-standard telephone (IST)
such as a model 2500. It does this through an the JM008 expansion module or ATI-D
analog terminal interface.
An IST provides a full range of system features to the system telephone users and
operates in one of two different modes as determined by the system installer. He or she
may program the telephone to provide an intercom dial tone when a user lifts the handset.
This arrangement is known as "prime intercom." Alternately, the installer may program
the telephone to provide outside line dial tone instead. This arrangement is known as
"prime line automatic" or "idle line preference." With prime intercom, users can dial the
system feature codes as soon as they lift the IST's handset. With prime line automatic or
idle line preference, users must obtain intercom dial tone before dialing the various
feature codes. They do this by pressing and releasing the hookswitch after they hear the
outside line dial tone. This action either drops the outside line (if no digits are dialed after
A – 38 Digital Telephone System Features
LCD Speakerphone
Non-LCD Speakerphone
Non-LCD Monitor Telephone
Single Line Proprietary Telephone
32-Button DSS/BLF Console
DSU II Digital Telephone System