Comdial Impact Dsu Instructions Manual

Appendix A:
Understanding The
System Features
A
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...

Account Codes (With Forced Positive Verification)
System users can employ account codes to identify calls by category or by any other
desired grouping so that the system can print reports. The account code entry can be
voluntary or the programmer can arrange the system so that the users are forced to enter
an account code before they can make an outgoing call. The system compares the
account code entered by a station user with a list of programmed account entries.
The programmer must program the system...

but cannot be lower than the verified account code length. The verified account code
length defines the number of digits that the system will verify before it accepts an
account code as valid. As well, verified account code length defines the number of valid
account codes that a programmer can store (as shown in the following table). A
programmer should be aware that when he or she changes the verified account code
length, the system automatically empties the list of valid account codes.
Account Code...

Forced Account Code Entry For CENTREX Users
The programmer may set the TAP time so that CENTREX usersdo nothave to re-enter
an account code after pressing the TAP button. The programmer may also set the system
so that non-CENTREX usersdohave to enter an account code after pressing TAP.
·If the TAP time is set for 1 second or less (the hookflash time), the system will not
clear an account code after a TAP entry. This enables CENTREX users to do host
system transfers without entering an account code a...

connections. It contains a ringing generator to generate a ringing signal for the IST
devices.
Area Paging Interface
Any station user can dial a special code number in response to an all-call or zone page
and be connected to the paging party in a private conversation. All-call or zone paging is
provided to the stations through the station class of service programming.
See also,Paging.
Assist Button
This feature allows a station user to program a button to be used for sending a message to
an LCD...

Automatic Dialing Of Stored Numbers
Automatic Dialing
The system supports up to 24 automatic dial (autodial) numbers per station. Autodial
buttons can store up to 16 digits plus an intercom or line selection. Stored digits include
0–9,Sand #. The system stores a pause at any point where the HOLD button is pressed,
and stores a hookflash at any point where the TAP button is pressed. Automatic dialing
provides a way to obtain one-button access to frequently used system features. This
feature does not...

Automatic Hold For Intercom
If a user selects the second intercom line while a call is active on the first intercom line,
this automatic hold feature lets the system automatically place the first intercom call on
hold. Use station class of service programming to enable this feature.
See also,Hold.
Automatic Hold—Transfer To Line
A programmer can use class of service programming to make this system feature
available to selected stations. When enabled, a user can press any line button and cause
an active...

Automatic Station Relocation
With this feature, the system will automatically recognize a particular station should that
station be relocated to a new station port. When someone places a telephone at a new port
location, it will continue to provide the same class of service parameters and respond to
the same extension numbers as it did at the original station port. A programmer must
enable this system feature using system class of service programming. As an added
feature when someone plugs an LCD...

B
Background Music
If the installer connects a customer-provided external music source to the system, the
music from that source will sound through the station loudspeakers after the users turn it
on at their stations. They can adjust the loudness of this background music with the
loudspeaker volume control. The system automatically turns the background music off
during calls. This feature requires no class of service programming.
See also,Music Features.
Basic Key Service (1A2) Emulation
The system...

Block Programming
A programmer can assign a particular line or station’s class of service to an entire block
of lines or stations with one programming action. This feature eliminates the need for
him or her to individually program stations and lines with the same class of service. A
programmer can perform a block programming class of service after he or she has
programmed a station class of service or line class of service for a particular station or
line.
See also,Class Of Service.
C
Call Announce With...