Comdial Impact Dsu Instructions Manual

							The following information illustrates the digit evaluation scheme.
Digit Evaluation
Quantity Of Digits
DialedActual Dialed DigitsDigits Evaluated By
System To Find Line
Group
2 67 067
3 118 118
4 5123 512
7 9782200 978
8 19782200 978
10 8049782200 804, 978
11 18049782200 804, 978
The example below shows how calls to area code 202 are routed using line group 2, calls
to office code 202 are routed using line group 1, calls to office code 973 in area code 716
are routed using line group 4, and all other calls are routed using line group 1.
Routing Calls Through Different Line Groups
Special Tables For Selected Area Codes
(Each table is for office code entries in a specific area code.)
Entries
000–999Office
Code TableArea Code
TableArea Code 1
(716)Area Code 2
()Area Code 3
()Area Code 4
()
000 1 1
001 1 1
002 1 1
202 1 2 1
212 1 1 1
973 1 4
997 1 1
998 1 1
999 1 1
The programmer can arrange for the system to insert up to eight digits (including * and #
as well as 0–9) ahead of a dialed number for a selected line group. Further, the
programmer can enter a pause of system-determined length as a character in the digit
string.
To help understand this digit insertion, review this typical arrangement for transparent
CENTREX operation (This example assumes that the CENTREX extensions do not
conflict with the office codes.): With the digital telephone system installed behind a
CENTREX system, callers can make outgoing calls without having to dial 9. Assume
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							that the CENTREX extensions are 3300–3399. Take programming action to assign line
group 2 to entries 330–339 in the office code table. This means that calls on CENTREX
extensions will use line group 2 and all other calls will default to use line group 1.
Program the 9 digit as the insertion digit for line group 1. With this set up, when a caller
dials a number other than a CENTREX extension, the system automatically inserts a 9
ahead of the dialed digits and routes the call over line group 1.
If no lines are free in a selected line group, the system will route the call to an overflow
line group if the programmer has assigned one; otherwise, the system will return busy
tone to the caller.
NOTE: If the programmer has arranged for the system to insert digits on a particular
line group, he or she should consider arranging for the system to insert digits in the
overflow  line group as well. This consideration is necessary only if it is important for
the call to route through the same common carrier as was the original line group.
While line group dialing codes 81, 82, and 83 do not provide access to the SRA feature,
they could provide a means of bypassing SRA by allowing users access to line groups
outside of the SRA process. To insure that the system routes all calls through SRA,
programmers should use the feature inhibit programming procedure to inhibit dialing
codes 81, 82, and 83.
Using Specialized Route Access For Simplified Toll Restriction
In anticipation of the implementation of the revised North American dialing plan, the
SRA feature provides the system with the ability to deny calling to designated area or
office codes. The programmer merely assigns a line group that contains no assigned lines
to the designated office or area code. This prevents the system from routing calls for
dialed numbers containing those particular area or office codes since there is no line
available. This action will work only for manually dialed numbers because automatically
dialed numbers, with no line preselect, employ the last used line and therefore cannot be
restricted.
Square/Non-Square Configuration
A programmer can arrange for a system to be square or non-square as desired. In a square
system, the line 1 buttons of all telephone stations select line 1, the line 2 buttons select
line 2, etc. In a non-square system, each line select button at every station may be
assigned individually to select any line. A programmer can perform unique button
mapping for line appearance on each station using the station class of service
programming.
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							Flexible Station Numbering Plan
The system supports a flexible station numbering plan for individual stations. Each
station can be programmed to respond to the dialing of any available number between 10
and 7999. This feature may be used to match the calling number of a station located in a
pre-numbered area to that area number. A combination of two, three, or four digit
extension numbers can be assigned as long as they do not conflict. For example: If 21 is
assigned as an extension number, there can not be any other extension number assigned
that begins with a 21. The system class of service programming is used to assign
extension numbers to individual station ports.
Tenant Service
A system programmer can arrange for one telephone system to be used for multiple
tenants at a site location by employing flexible line appearance at each station. The
programmer can perform button mapping for line appearance on each station in the
system using the station class of service programming.
Station Monitoring With DSS Call Pickup
The busy lamp field (BLF) of a station can provide visual indication of the idle, busy,
and ringing status of monitored stations. This monitoring station can also provide audible
indication of any direct and delayed ringing that occurs at the monitored station if the
programmer has enabled the visual ring indication feature. A user at the monitoring
station can make a one-button pickup of a ringing call at a monitored station by pressing
the direct station selection (DSS) button associated with the ringing station.
The programmer can enable or disable the flashing BLF lights associated with visual ring
indication on a system-wide basis. When the programmer enables the flashing lights, he
or she can then enable the audible indication of ringing on a station-by-station basis.
Station Speed Dial
Each station provides 10 speed dial number locations at the keypad buttons. Station
speed dial numbers can be up to 16 digits in length and can include line or intercom
selection, numbers, #,S, pauses, and hookflash signals. A user can store a pause by
pressing the HOLD button and store a hookflash signal by pressing the TAP button.
See also,Automatic Dialing.
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							Station-To-Station Messaging
If a station has a DSS/BLF appearance at another station, a callback message indication
can be left at that station with the DSS/BLF appearance. The user can dial a special code
to turn on the BLF light at the called station that is assigned to the calling station. This
light indicates that a callback is requested. The light is automatically turned off if a
successful callback is made.
If a station number is not programmed for a DSS/BLF appearance at another station,
attempting to place a call back message will cause the central message desk station to
ring. If there is no central message desk assigned, no action will occur.
See also,Messaging.
Subdued Off-Hook Voice Announce
With the subdued off-hook voice announce (SOHVA) feature, a user can make a voice
announcement from one station to another station that is off-hook and busy on a call. A
station being operated in a handsfree mode cannot receive a SOHVA. With SOHVA, the
caller delivers the call and the user receiving the call responds to it in a secure manner
that prevents the distant party from hearing either the announcement or the response.
The system precedes the announcement with a tone alert that it delivers to the handset
receiver of the called telephone. It also supplies a tone to the announcing caller to alert
them that they are making a SOHVA call. A programmer can set the quantity of tone
bursts from one to six. A user can respond to the SOHVA announcement either verbally
or non-verbally. He or she either effects a verbal response by pressing and holding the
MUTE button and speaking into the handset or effects a non-verbal response by pressing
a pre-programmed button to send a message to be shown on the display of the
announcing station (if it is an LCD speakerphone). The system automatically disconnects
the announcing station after it delivers the response message to it (and displayed if an
LCD speakerphone). Stations that have the voice announce blocking feature turned on
cannot receive a SOHVA. A programmer can use station class of service programming to
disable the SOHVA feature at a station port if desired.
Subdued Off-Hook Voice Announce Originate Button
This feature allows a telephone user to program a button at his or her station that she or
he must press before delivering a SOHVA call. This SOHVA enabled button allows a
caller, after hearing a busy signal, to decide whether to interrupt the called party in a
SOHVA manner. If the caller decides that the called should be interrupted, the caller can
press the button and complete the SOHVA call. This button, along with SOHVA groups,
allows system users greater control of the callers that are allowed to make SOHVA calls
and of the situations in which they are allowed to make them.
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							Subdued Off-Hook Voice Announce (SOHVA) Groups
The programmer can program the ability of station ports to originate and/or receive
SOHVA calls by assigning SOHVA calling groups to station ports. This means that he
or she can arrange certain station ports together for SOHVA calling between one another
while excluding other station ports in the system from this group.
The system provides eight different SOHVA groups that are fixed into a variety of
SOHVA receive/originate configurations. A programmer can assign one SOHVA group
to each station port to allow or to deny SOHVA receive and/or originate capability to it.
By properly assigning SOHVA groups to station ports, the programmer can open or
block SOHVA paths between stations.
The system is defaulted with no SOHVA groups assigned. When a station port does not
have a SOHVA group assigned to it, it’s user can originate SOHVA calls to any station
port and receive SOHVA calls from any station port.
SOHVA groups arefixedby the system into the following configurations:
SOHVA Groups and Their Configurations
SOHVA Group Group Configurations
Group 1 1 2345678
Receive From X
Originate To X X X X
Group 2 1 2345678
Receive From X X
Originate To X X X
Group 3 1 2345678
Receive From X X
Originate To X X
Group 4 1 2345678
Receive From X X X
Originate To
Group 5 1 2345678
Receive From X
Originate To X
Group 6 1 2345678
Receive From X
Originate To X
Group 7 1 2345678
Receive From X
Originate To X
Group 8 1 2345678
Receive FromX
Originate ToX
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							Example 1: Allow station port 10 to originate SOHVA messages to all stations in the
system and allow those stations the ability to originate SOHVA messages to each other
but not to station port 10. Assign group 1 to station port 10 and assign group 2 to all
other station ports.
Example 2: Allow station ports 14 and 15 to receive and originate SOHVA calls
between each other but deny both receive and originate capability from any other system
stations. Assign group 8 to both station port 14 and station port 15. Do not assign group 8
to any other station portbut be sure that all station ports have a group assigned to them.
The programmer assigns SOHVA groups using the station class of service programming
procedure.
Subdued Ringing
When a station is busy on a call and another call comes to the same station, the system
will automatically subdue the ringing of the second call to a lower volume.
See also,Ringing.
System Alarm Reports
The programmer can arrange the system to report alarm and status conditions to a
particular station or stations that he or she has enabled to receive them. The alarm
receiving station must be an LCD speakerphone. When a station is enabled to receive
alarms, its user can take appropriate action to cause the alarm codes to be presented on
the LCD display. A programmer must use both system and station class of service
programming to enable this feature.
System Speed Dial
The system provides 99 system-wide speed dial numbers. The system speed dial numbers
can be up to thirty-two digits in length, and can include numbers, #,S, pauses, and
hookflash signals. The attendant programs the system speed dial numbers at station 10 or
12 for use at every station in the system. No class of service programming is required.
See also,Automatic Dialing.
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							T
Tandem Attendant
When the programmer uses system class of service programming to enable the tandem
attendant feature, a recall from an unanswered call transfer or a timed hold recall will
ring at the normal attendant station (station 10) that set the transfer or hold condition, and
also ring at the tandem attendant station (station 12).
TAP (Flash/Recall)
If the host system provides custom calling features via a hookflash signal, the
programmer should program the system so that the TAP button will generate a “flash”
signal when a user presses it. If custom calling features are not available to digital
telephone system users, the programmer should program the TAP button to function as a
positive disconnect, dial tone recall button. The flash and recall features are mutually
exclusive. The programmer uses the system class of service programming procedures to
set the flash or recall TAP time.
Tenant Service
A system programmer can arrange for one telephone system to be used for multiple
tenants at a site location by employing flexible line appearance at each station. The
programmer can perform button mapping for line appearance on each station in the
system using the station class of service programming.
See also,Square/Non-Square Configuration.
Timed Hold Recall
After a call has been on hold for a programmed length of time the system will re-call the
station that placed the call on hold. The programmer sets the timed hold recall time
period using system class of service programming.
See also,Hold.
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							Toll Restriction
Default Toll Restriction
The system defaults two toll restriction tables with pre-programmed values and
pre-assigned to all lines. The programmer needs only to assign these tables to the stations
by programming action to put them into effect. He or she can use the toll restriction table
configuration class of service programming to reprogram the defaulted tables with
different information as needed.
Flexible Toll Restriction
A system programmer can configure system toll call restriction to prohibit some or all
stations from calling a wide range of number combinations. The restricted numbers are
specified on up to 16 tables. The system assigns several broad-range values to two of
these tables, and assigns the tables to all lines as a default condition. The programmer
needs only to enable the default tables on a per station basis to activate the default toll
restriction.
In general, toll restriction works as follows:
The programmable tables of restricted numbers can contain up to four entries and each
entry can contain up to 16 digits.
A programmer programs each table of restricted numbers to be an “allow” table or a
“deny” table with entries in an “allow” table overriding entries in a “deny” table. This
arrangement allows the programmer to enable exceptions to toll restriction. For example,
he or she can arrange the table entries so that the system allows the dialing of
1-800-xxx-xxxx numbers even though it denies the dialing of all 1-xxx-xxx-xxxx
numbers. A programmer can store a “match anything” symbol (#) to represent any digit
from 0 to 9 in the individual entries thus providing him or her with a broad range of
number combinations to choose from.
The programmer can individually assign the programmed toll restriction tables to each
appropriate station and line. Therefore, when an outside call is dialed, the system
examines the dialed number and makes a comparison between it and the toll restriction
tables. Any tables that the programmer assigned to BOTH the station being used and the
selected line determine the restrictions to be imposed. It should be noted that the system
will automatically disconnect a line from a station if its user dials a restricted number on
a restricted line from a restricted station.
Night Mode Toll Restriction
A programmer can assign toll restriction tables to any or all stations in the system that
will only take effect when the system is in the night transfer (of ringing) mode. These toll
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							tables replace any that he or she may have assigned to the station for normal, or day
mode, operation. For example: a programmer can arrange for a station that has no other
toll restriction table assignment to receive a toll restriction table which will restrict
everything but local calls and will only take effect when the system is placed in the night
transfer (of ringing) mode. Therefore, even though users can make toll calls from this
station during daytime operation, they can make no toll calls from it when the attendant
programs the system for nighttime operation using the night transfer of ringing feature.
NOTE:Do not confuse this night mode toll restriction table assignment with the night
transfer (of ringing) feature.
Toll Restriction Override
The toll restriction override (TRO) feature allows users to override the toll restriction that
they encounter at other stations with their own station’s toll restriction assignments. In
programming for this feature, the programmer creates a four-digit TRO code that users
can dial to override the toll restrictions of any station that they happen to be using and
replace it with a toll restriction that matches their home station. After entering a TRO
code, a user gets his or her own prime line or idle line preference and its accompanying
toll restriction assignment. They then have 15 seconds to dial an outgoing call. Once they
hang up from a call, they have 15 seconds to make another call without having to re-enter
their TRO code. The system marks outgoing line calls that users make after entering a
TRO code with a (T) in its SMDR/SMDA printouts. The station number that it prints is
that of the overriding station and not the actual station that the call was made from. If a
user transfers a TRO call or places it on hold and picks it up at another station, the call
belongs to the new station.
Positive Disconnect Supervision
When a station is on line with an outside caller and the caller hangs up, the CO may send
a positive disconnect signal to the telephone system. A programmer can enable a positive
disconnect supervision feature on a per line basis. With this feature enabled when the
telephone system detects the CO’s positive disconnect signal, the system resets the toll
restriction, releases the current call record, and creates a new call record in its place.
Tone Or Voice Signaling (Intercom)
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.
See also,Intercom.
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							Tracker Paging System
The optional Tracker Paging System is a wireless paging system that uses an external
base station connected to the common equipment cabinet and individual portable pagers
assigned to the system station extension numbering plan. The Tracker Paging System
allows telephone users to send alpha/numeric or numeric-only messages to Tracker
pagers assigned to station extension numbers. The type of message that the system
delivers is dependent on the model Tracker pager being used. The Tracker base station
requires only one connection to the digital telephone system; however, the installer will
need to take several programming steps to make it operational.
Transferring Calls
SeeCall Transfer.
Transfer/Conference Button
The telephones provide this fixed button that gives quick, easy transferring and
conferencing.
U
Unanswered Call Transfer Recall Timing
A transferred call that is unanswered after a pre-programmed length of time will return to
the station that transferred it. The system will return the call to both attendant stations
when the tandem attendant feature is enabled. When LCD speakerphones are employed,
the display will show the station number or name as well as the line number that is being
re-called. The system class of service programming determines the recall time for an
unanswered call transfer.
See also,Call Transfer.
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