Comdial Dsu II Digital Telephone System Instructions Manual

Full Button Programmability Of Features
A programmer, or in many cases the users themselves, can make most system features
available at programmable buttons merely by storing the specific access codes necessary
for dialing the features. Storable features include those that can utilize lamp (on/off)
supervision (e.g., call park orbits). The system will store all feature access codes except
for those requiring Transfer/Conference button action. It will store continuous strings of
digits (including presses...

Hold
Abandoned Hold Release
If an on-hold party hangs up at the CO/PBX end of a connection, causing an interruption
in the line current, the system will drop the line from the hold condition and return it to
service. The time interval between hang-up and line-drop is programmable in line class
of service programming with choices of either 50 msec or 350 msec. This feature is
usually dependent upon special arrangements that must be made at the CO end of the
connection. The line select indicator will turn...

Exclusive Hold
Exclusive hold prohibits a held call from being retrieved by any other station. The
exclusive hold condition also links the held call to the timed hold recall timeout feature.
After timeout, the system causes audible and visual signaling to occur reverts the
exclusive hold condition to a normal line hold condition.
Exclusive Hold System-Wide Enable/Disable
This feature allows programmers to use system class of service programming to enable or
disable exclusive hold capability on a...

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...

the handset is lifted) or places the outside line on hold (if digits are dialed) and causes
intercom dial tone to return to the IST.
Pressing and releasing the hookswitch is commonly known as flashing the hookswitch or
performing a FLASH. Some ISTs are equipped with a TAP button, Users can press the
TAP button to cause the same effect as performing a FLASH.
The system provides a feature that allows IST users to FLASH an outside line for some
purpose (for example, to access a host system feature). Since...

·Intercom call to station already busy on intercom rings in subdued fashion and
flashes indicator associated with other intercom button.
·With both intercom lines busy, a third intercom call results in a subdued off-hook
voice announce (if enabled) at busy station.
·Pressing a DSS button while on an active intercom call will drop the distant party
unless the automatic hold feature is enabled for the intercom line through class of
service programming.
The hold button can be used, however, to place an...

Tone Or Voice Signaling
The system allows intercom calls to be tone signaled or voice signaled as the users
desire; however, the programmer uses system class of service programming procedures
to determine which signaling method the system will employed as the primary method.
Regardless of the programmer’s arrangement, telephone users can take action to use the
alternate method when they need it. See the paragraph titledIntercom Call Progress
Tonesfor a discussion of the intercom signaling tones.
Voice...

preference. If they are unavailable, the system will chose the last line used at the station.
If it is busy, no further choice is made. No class of service is required.
See also,Redialing.
LCD Messaging
Standard and system-supplied custom display messages can be set by dialing a specific
code at any station. Such messages are to be received and displayed by any LCD
speakerphone that calls the station which set the message. When a message is set, the
intercom light at the setting station will flash to...

Line Features
Access Denied, Line Access Restriction
The system programmer can deny access to particular lines at certain stations in the
system. A station user cannot select a denied line for use. This feature is programmable
on a per line/per station basis in station class of service programming.
Line Answer From Any Station (Night Mode)
When the attendant programs the system for nighttime operation using the night transfer
of ringing feature, the line answer from any station feature is made active....

Line And Line Group Queuing
With the line queuing feature, the station user can take action that will place a station in a
queue where it awaits the availability of a line or line group. The station is automatically
signaled with five-ring bursts when the line is available to it for use. Each station can
queue one line at a time.
Originating Denied
The ability to originate calls on certain lines can be denied at individual stations through
system programming. The originating denied feature is programmed...