Comdial Digital Telephone System Instructions Manual

							Flexible Ringing Assignments
Refer to the discussion titled Ringing.
Flexible Ringing Assignments Of PA Port
Refer to the discussion titled Ringing.
Flexible Station And Line
Class Of Service Control
Refer to the discussion titled Class Of Service.
Flexible Station Numbering Plan
Refer to the discussion titled SquareIVon-Square
Configumrion.
Full Button Programmability Of Features
Refer to the discussion titled Programmable f3uttons.
Handsfree Answer Inhibit
Refer to the discussion titled Mute.
Headset Capability
Certain proprietary LCD speakerphones include an
auxiliary jack that provides an interface for a headset.
To use a headset, the user merely plugs it into the
telephone auxiliary jack and presses the appropriate
button on his or her telephone to enable the headset
mode. The telephone transfers its speakerphone
function to the headset. To enhance the headset
usefulness, the system delivers subdued off-hook
voice announce (SOHVA) messages to the headset
when it is in use.
Hold
Abandoned Hold Release
If an on-hold party hangs up at the COIPBX 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 off to indicate an idle line after a call on that line
hasbeenabandoned.
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.
Automatic Hold - Transfer To Intercom (Answer Hold)
If a user selects the intercom line while an outside line
call is active, this system feature causes the system to
automatically place the outside call on hold. This
lMl66-107Description Of System Features
feature does not require class of service programming
to enable it.
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 line to automatically go on
hold. This feature allows a user to move from line to
line without having to press the HOLD button to place
any current calls on hold. Use station class of service
programming to enable this feature at the desired
stations.
Call ParkThe call park feature is similar to a manual hold
condition. A user can park a call a particular station
and retrieve it at any station in the system by dialing
the appropriate access code. (Note: the retrieving
station must have access to the line on which the call
appears.) Calls are parked and retrieved within the
system through the use of dialing codes. The system
provides nine parking circuits (orbits). Call park, when
used with the paging features, allows a system
attendant to direct calls to roving personnel. A call
that is left in a parking orbit for preprogrammed length
of time automatically returns to a timed hold recall
condition at the station where the user originally
parked the call.
Exclusive HoldExclusive 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 signalling 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 system-wide basis.
Manual Hold
A button activated feature at each station will place an
outside line on hold. When a user presses the HOLD
button while on a call, the system places the call on
hold, provides a distinctive flash rate of the line button
indicator, and allows the user to access other station
features. A user at the holding station or at any other
station that has access to the line can retrieve the held
call.
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.
2 
- 13 
						

							Description Of System FeaturesIMl66-107
I Hold And I Use Indications
The light associated with a line button provides a
visual indication of the status of that line. When a
station user has a line in-use or on-hold at a station,
the light indication provided at that station is of a
different color than the indication provided at the other
stations in the system. No class of service
programming is required.
Idle Line Preference
Refer to the discussion titled Line Feature&
Industry-Standard Telephone Support
Refer to the discussion titled Analog Terminal
Interface Support.
Intercom Features
Automatic Callback
If a telephone user encounters a busy tone or a ring
no-answer after calling an intercom station, She or he
can dial a special code number that will cause the
system to automatically ring both the user’s telephone
and the one that he or she was calling. This automatic
callback occurs after the busy station becomes idle or
after the user at the ring no-answer station takes some
action at it that indicates to the system that it is
available to be answered. No class of service
programming is required to enable this feature.
Call Announce With Handsfree Answerback
The internal loudspeaker at each station provides
call-announce capability over the intercom link. A user
can make a handsfree response to a call-announce
call without lifting the handset.
The user can use the MUTE button to block all
handsfree 
answerback response. This arrangement
will prevent a station user from monitoring another
station site using the monitoring ability of the voice
announce feature.When a user presses the MUTE
button, all handsfree answerback is disabled thus
inhibiting any off-site monitoring. The MUTE light
turns on steady to indicate that this feature is active.
Dual Intercom
This feature provides for two separate intercom lines
at the same station. One intercom line is fixed and is
accessed with the Intercom button. The other
intercom line is programmable and is accessed by a
programmable button selected for that purpose by
class of service programming. Calls are handled on
the intercom lines in much the same manner as
outside calls are handled using the line buttons.
Special considerations are as follows:l
Distant party hang-up causes intercom link to drop.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
intercom call on hold before selecting the other
intercom line for use.
Any action taken on the intercom by a station
being observed via the service observing feature
will cause the observing station to return to an idle
state.
The station class of service button mapping procedure
assigns a programmable button to serve as the
second intercom button.
Intercom Call Progress Tones
Intercom call progress is marked by special tones. A
steady tone is provided for dial tone.Ring-back tone
is one second on and three seconds off. For tone
signalled intercom calls, a two-tone burst is sounded
every four seconds at a called station and returned to
the caller as ring-back. For a voice signalled intercom
call, a single tone burst is sounded at a called station.
When a called station is busy, a busy signal of
one-haff second on and one-half second off is
received at the calling station. A fast busy tone will be
supplied when the called station is in the do not disturb
mode. 
ATI-D ports are only supplied with the regular
busy tone since fast busy tones could interfere with
the operation of some accessories that can be
connected to this port.
Intercom Hunt Group
Station ports can be assigned to intercom hunt groups.
When a station that is assigned to a hunt group is
busy or is a ring-no-answer (RNA), a call to it will ring
at the next idle station in the group. A hunt group can
be terminal or circular. A call will route down a terminal
group from the called station until it finds an idle
station or reaches the end of the group. A call will
search around a circular group until it encounters an
idle station or until all stations in the circular group are
searched. The ringing time at any one station is
programmable. Hunt groups are created through
station class of service programming.
Intercom Line Timeout
Should the intercom line be selected with no dialing or
other action taking place, the intercom will timeout
after 
65 seconds, and return to an idle state.
Intercom Features 
_ continued on next page. . .
2,- 14 
						

							IMl66-107Description Cf System Features
Intercom Features - continued
Tone Or Voice Signalling
The system allows intercom calls to be tone signalled
or voice signalled as the users desire; however, the
programmer uses system class of service
programming procedures to determine which
signalling 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
previous paragraph titled 
intercom Call Progress
Tones for a discussion of the intercom signalling tones.
Voice Announce Blocking
This feature allows station users to block voice
announced intercom signalling by dialing a code 
or
pressing a programmable button programmed for that
purpose. The programmable button used to block
voice signalling is enabled by station class of service
programming.
Key System/Hybrid Configuration
The system can operate as either a key system (KF
designation) or as a hybrid (MF designation) system.
In the past, this digital telephone system provided a
hardware strap that installers could move to
distinguish between hybrid system and key system
operation; however, recent rulings by the FCC have
eliminated the need for the hardware strap. Therefore,
with software release revision 11 A, whenever the
programmer assigns lines to line groups the system
automatically assumes the hybrid mode.
The KF and MF designations are equipment type
categories as stipulated in FCC rules and regulations,
Part 68, and appear as part of the FCC Registration
Number on the equipment label. The installer must
report the appropriate registration number to the
telephone company at the time of connection along
with other FCC mandated information. Operationally,
the hybrid configuration allows dial access to
(automatic selection of) outgoing lines. The specific
system feature that is enabled by the multifunction
(hybrid) configuration is Line Group (Including Dial
Access). Since this is a PBX type feature, it may incur
a higher monthly tariff to the telephone company.
Last Number Redial
Refer to the discussion titled @dialing.
LCD Messaging
Refer to the discussion titled Messaging.LCD Support .
The system supports the use of digital telephones
having a Liquid Crystal Display (LCD). The display is
capable of providing the station user with a visual
presentation of: call cost, call duration, number dialed,
name of called station, name of active feature, date
and time, and programming prompts.
Interactive Button Support
Beginning with software release 11 A, the digital
telephone system supports the 
DigiTech LCD
speakerphone with a revision letter of I and later.
This LCD speakerphone provides the user with three
interactive buttons and expanded LCD displays as a
standard feature. The interactive buttons provide the
user with quick easy access to system features and
straight-forward button programming without dialing
codes. The expanded displays prompt the telephone
user on the operation and progress of many of the
telephone features and provides designations for the
interactive buttons. Since the interactive buttons
provide many user features, their immediate functions
vary with the feature. The button functions change to
match the feature that the user is currently operating.
At any given time, the current button designations
show in the display window.
Beginning with software release 
118, the digital
telephone system provides Americom LCD
speakerphones (product codes 701 OS and 
7016s)
with the same interactive button support. This support
is disabled at default but can be enabled by the
system programmer whenever it is required.
Beginning with software release 
128, the system
includes 
/mpact telephone support. The impact LCD
speakerphones (product code 
8024s and 8012s) also
provide interactive button and expanded display
operation to the telephone users as a standard feature.2-15 
						

							IM166-107DesCtiDtiOn Of Svstem Features
LCD Support - continuedButton Query
Beginning with software release 14A, station users
who have LCD speakerphones can use their
interactive buttons to access the button query feature.
With this feature, the station user can cause his or her
LCD speakerphone to show the function of each of its
buttons on its display.
2-15A(TAB1 17~23) 
						

							Description Of System FeaturesIMl66-107Line 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. With this feature, a user can dial an access
code over the intercom line to allow him to answer any
ringing outside line. The line need not be ringing at
the user’s station for this feature to be used.
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.
Line Groups
Outside lines can be grouped together in up to four
different groups. Each group is accessible through a
unique dialing code or automatically selected with the
programmable 
autodial feature. Grouping can reserve
certain lines for certain clusters of stations as in a
tenant-service arrangement. The assignment of line
groups.frees station buttons nom-rally used for line
selection thus making these buttons available for use
with a feature such as personal 
DSS/BLF with
station-to-station messaging. Lines are placed in line
groups with the line class of service programming.
Line Preselection
A line can be manually selected before lifting the
handset (for handsfree dialing) or after the handset is
lifted.
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 signalled with five tone 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 on a per station/per line basis.
Originating denied does not prevent a user from
answering a ringing line, retrieving a held call or
receiving a transferred call. Call origination on a line is
denied at a particular station by the station class of
service programming.
Prime Line Automatic
If the programmer uses station class’of service
programming to enable prime line automatic at a
station, the system will automatically select the
designated outside line, intercom line or line group
when the user lifts the handset. A user can pre-empt
prime line pickup by preselecting another line before
lifting the handset. If the prime line is ringing, it is
automatically answered when the user lifts the
handset.
Ringing Line Preference
The system can be programmed on a per station basis
to provide ringing line preference on all lines
programmed for ringing at the station. When ringing
line preference is enabled at a station, taking the
handset off-hook automatically connects the station to
any outside line that is ringing at it. A line button will
not have to be pressed. With ringing line preference
enabled, the telephones denote a ringing line with an
orange colored status light. If a station also has prime
line assigned, the prime line will always be answered
first even though it may be the second line to ring.
The ability of a particular station to answer a ringing
line without line selection is enabled by the station
class of service programming.
.
2 - 16 
						

							IMl66-107Description Of System Features
Manual Hold
Refer to the discussion titled Ho/d.
Meet-Me Answer Page
Refer to the discussion titled Paging.
Messaging
Assist Button
This feature allows a station user to program a button
to be used for sending a message to an LCD
speakerphone. Once programmed, the station user
can press the ASSIST button at anytime to sound a
tone burst at the called station and present a
preprogrammed message in the station display. The
user can send a message while on a call without
alerting the distant party. This feature is useful for
requesting assistance while engaging on a call. For
example, a customer service representative could
request assistance from a supervisor while talking to a
problem caller. The supervisor, upon receiving the
tone and noting the display message, could perform
an executive override or service observing action to
join the call 
.or monitor it.
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
indicate that the feature is active.
Message Waiting
Special feature access codes enable a station user to
control the message waiting (MW) light at other
stations in the system. When the message waiting
light is turned on at a station, a call can be
automatically placed to the station that turned it on.
Alternately, one station 
can-be designated by COS
programming as the central message desk and can be
arranged for exclusive message waiting control. The
central message desk can be used to control message
waiting lights and deliver messages to and from allother stations in the system. The ability of a station to
originate a message waiting signal is enabled by
programming action. Station class of service
programming provides a station with the ability to
originate a message waiting signal and is used to
create a central message desk.
Response Messaging
This feature allows a user to reply in a non-verbal
manner to a voice announce or tone-signalled
intercom call or to a subdued off-hook voice announce
call if the intercom caller is using an LCD
speakerphone. A station user can press a
programmable button in response to an intercom call
and send a message to be shown on the display of the
calling station. Response messages are
pre-programmed by the attendant and later stored by
station users at programmable buttons on their
individual stations as need dictates.
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 
DSSBLF 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.
Modular Wiring And Jacks
2- Or 4-Conductor Wire System
The system can be completely interconnected by
employing industry standard 
50-pin connectors and
modular plug/jack combinations. Station wiring is
number 22 or 24 gauge, 
2-conductor, twisted-pair
cable throughout the system. If the installer uses
4conductor twisted-pair cable, it provides a spare pair
for a separate wiring purpose when needed. 
						

							IMl66-107Description Of System FeaturesMessaging 
- continued
Message Waiting Originate Default
With software release 14A, the default condition for
the message wait originate feature changes from
disabled to enabled.
2-17A(TAB1 17~33) 
						

							Description Of System FeaturesIMl66-107
Multiline Proprietary Telephone Support
With software release 13B on software cartridges with
a product code designation of Innnn, the digital
telephone system provides support for the 
impact
multiline proprietary telephone with a product code of
6112N. This telephone provides the system users
with economical multiline operation without the added
complexity of monitor or speakerphone requirements.
The system automatically recognizes the multiline
proprietary telephone when the installer connects it to
a station port. The programmer does not have to take
any programming action to allow it to operate.
Music Features
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.
Music Interface
The common equipment cabinet includes an input jack
where the installer can connect a customer-provided
music source.
Music-On-Hold
When an installer connects a customer-provided
music source to the system through the music
interface jack, the system supplies that music to the
outside lines that users place on hold.
Music-On-Hold System-Wide Enable/Disable
After the installer has arranged for the system to
supply customer-provided music to calls that users
place on hold, the attendant can disable the feature on
a system-wide basis.Music Interface
Refer to the discussion iitled Music Features.
Music-On-Hold
Refer to the discussion titled Music Features.
Music-On-Hold System-WideEnable/Disable
Refer to the discussion titled Music Features.
Mute
Every monitor telephone and speakerphone has a
MUTE button which, when pressed, will mute the2-16
handset transmitter (or internal microphone on
speakerphones) to prevent the user’s voice from being
heard by the distant party. The MUTE light turns on
steady to indicate a muted condition. The button
provides push-on/push-off operation on
speakerphones or push and hold operation while on
hook. No class of service is required.
Handsfree Answer InhibitI
The user can use the MUTE button to block all
handsfree answerback response. This arrangement
will prevent a station user from monitoring another
station site using the monitoring ability of the voice
announce feature.When a user presses the MUTE
button, all handsfree answerback is disabled thus
inhibiting any off-site monitoring. The MUTE light
turns on steady to indicate that this feature is active.
Night Transfer (Of Ringing)
Refer to the discussion titled Ringing.
On-Hook Dialing
Every monitor and speakerphone provides manual
and/or automatic dialing while the station handset is
on-hook. The telephone loudspeaker monitors call
progress for completion. (The handset must be taken
off-hook to provide the voice link on 
non-
speakerphone stations.)
Originating Denied
Refer to the discussion titled Line Features.
Paging
All-Call Paging
All-call paging allows all stations to receive
announcements through the station speaker at once.
The system can also send all-call paging to the paging
port where it applies it to the input of an external
paging amplifier. Origination of announcements must
be via the station handset. A programmer can arrange
each station to receive and/or originate all-call page.
He or she enables the ability to receive and originate
all-call paging at a station through station class of
service programming.
External Paging Interface
A dedicated paging port or a spare line port can be
interfaced with an external paging amplifier. The
paging amplifier can then be dial-accessed by stations
in the system. DTMF tones can be dialed through the
line port to provide zone selection if provided by the
external paging amplifier. The dedicated paging port
does not support any “talk-back’ capability even if
such a feature is provided by the external equipment.
The line class of service programming arranges a line
port for external paging interface.
Paging Features 
- continued on next page . . . 
						

							Paging - continued
Meet-Me Answer Page
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. Ail-call
or zone paging is provided to the stations through the
station class of service programming.
Zone Paging
Zone paging allows groups of stations to receive
announcements through the station speakers. The
programming can enable zone paging in up to four
different zones. Zone paging can also be received at
the paging port where it can be connected to the input
of an external paging amplifier. The ability of each
station to originate and/or receive a page and the
arrangement of the paging into different zones are
controlled by station class of service programming.
Zone paging through the paging port is enabled by
system class of service programming.
Memory Retention Without Batteries
The system memory is electronically protected during
AC power failures by an electronic device sometimes
known as a “super cap.” The stored program data will
remain in memory for a minimum of 60 hours provided
that the system has been powered continuously for at
least 30 minutes prior to the power failure or
disconnection. Also, the system clock will continue to
tun and keep time for at least 30 minutes after an AC
power failure or disconnection.
PBWCENTREWCO Compatible
System features and programmable buttons support
the requirements of most 
PBXs, Central Offices, and
CENTREX systems. Numbers, ##‘s, #‘s,
programmable pauses, and flash signals can be made
a part of every stored number for access to host
system feature codes.
Personalized Ringing Tone
Refer to the discussion titled Ringing.
Pooled Line Access (Line Group Access)
Refer to the discussion titled Line Features.
Power Failure Transfer
An installer can connect an industry-standard
telephone such as the model 2500 to a special
connection to 
seNe as a power-fail telephone. If an
AC power failure occurs, the system automatically
connects the power-fail telephone directly to an
outside line. Users can make normal origination and
reception of calls on a power-fail telephone during an
AC power failure. The system will automatically
lMl66-107
Description Of System Features
disconnect the power-fail telephone from the outside
line as soon as AC power returns.
Prime Line Automatic
Refer to the discussion titled Line Features.
Privacy
Automatic Privacy
A programmer can make a line private or non-private
through programming. In the private mode, a station
has exclusive use of the line during a call. No other
station can access that line unless the user of the
private line includes the another station through the
use of the add-on conference feature. In the
non-private mode, another station with that line
appearance can gain access at the same time
(sometimes known as common line pickup). 
,A line is
specified as private or non-private through the line
class of service programming. Through station class
of service programming, a programmer can make a
line non-private at a particular station. Also see the
discussion titled 
Conferencing.
Privacy - Designated Programmable Button
The programmer can arrange for stations to provide a
privacy button.If a line is private, a user can press the
privacy button to change it into a non-private one.
If
the line is non-private, pressing the button will have no
effect. Station class of service programming is used to
program the programmable button function at the
stations.
Privacy Release/Brokerage Service
See the previous paragraph titled Privacy - Designatep’
Pfogrammab/e Button
Private Lines (Access Denied)
See the discussion titled Line Features.
Programmable DSS/BLF
Refer to the discussion titled Automatic Dialing.
Programmable Buttons
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.
lt 
Will store continuous strings of digits (including
presses of the intercom button) up to the maximum
amount of storable digits (16) allowed in an 
autodial
entry.2-19 
						

							Descriotion Of Svstem FeaturesIMl66-107
Pulse/Tone Switchable
The programmer can program the system on a per line
basis using the line class of service programming to
allow the stations to switch from pulse to DTMF type
dialing as needed. Alternately, she or he can program
the system to only allow tone dialing.
Redialing
Automatic Redial (Of Busy
Number Or Unanswered Call)
A user can automatically redial a busy number or
unanswered call by activating this feature. Once the
user activates automatic redial, the station will select
the line, automatically dial the number, and wait for a
response. It will do this once a minute for
approximately 10 minutes unless the user deactivates
the feature by pressing that button or another button or
by lifting the handset. The feature cycle is timed and
does not have busy detection circuitry. Because of
this, if the user is operating handsfree when the called
party answers, she or he must lift the handset to
prevent the caller from being cut off by the timing
cycle. The automatic redial button is a designated
programmable button position and the user must
program its location to make it active.
Automatic Pause Insertion
When the system stores a dialed number for later
redial, it automatically stores a pause whenever the
user waits between digits for at least two seconds.
The system inserts the automatic pause in the stored
number sequence at the point where the manual
pause in dialing occurred. The length of the automatic
pause is programmable.
Last 
Number Redial
Each station is provided with a last number redial
feature. This feature will save 32 digits of the last
outside number dialed. A newly dialed number will
always automatically replace a previously dialed
number. Upon command, the system will choose a
line and redial the saved number. The system will first
choose the prime line if assigned and idle. If it is busy
or unavailable, the system will choose any line
assigned to idle line 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.
Saved Number Redial
This feature enables a button action to save the first
16 digits of the last number manually dialed from the
keypad. The saved number can be redialed at a later
time, The saved number is permanently available for
later use until it is replaced with a new number.When the caller identification feature is active, this
saved number redial feature will save the identified
number for redial.
Response Messaging
Refer to the discussion titled Messaging.Remote Programming And Administration
Refer to the discussion titled C/ass Of Service.
Ringing
Auxiliary Ringer Interface
The auxiliary ringer interface provides “dry-contact”
relay closures which track the ringing pattern
whenever the system sends ringing to a
programmable destination. Programmers can
program relay control to be activated when the system
sends ringing to station port 17 or to the paging port.
When programmed for station port 
17 ringing, an
installer often uses an external device to provide loud
ringing.When programmed for paging port ringing, an
installer often installs an external paging amplifier to
sound the rings. The system supplies ringing tones to
the paging port along with the relay closures.It can
send the ringing tones to the input of an external
paging amplifier and the installer can arrange the
wiring so that the relay closures energize the paging
amplifier while it is receiving the ringing tone. Use
system class of service programming to choose either
the paging port. or station port 17 for the ringing port
relay control. Also use system class of service to
determine the type of ringing sent to the paging port.
Use station class of service programming to
determines the type of ringing that the system sends
to station port 17.
Common Audible Ringer Interface
Connections are available at the common equipment
that provides “dry-contact” relay closures whenever an
incoming line rings. These contact closures track the
ringing pattern and can be used to control an external
signalling device.
Delayed Ringing
Ringing assignments are programmable. A station
can be programmed to provide delayed ringing on
some lines while providing immediate ringing on other
lines. Delayed ringing is assigned to certain lines at
each station through station class of service
programming.
Distinctive Ringing
The ringing cadence of an incoming call is the same
as the ringing cadence of the TELCO, PBX, or
CENTREX system. The ringing cadence of an
intercom 
Call presents two tone bursts sounded every
four seconds.
Ringing Features 
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