Mitel SX 200 DIGITAL Pabx General Descriptions Manual

							System Features
l An extension with Option 226 (Inward Restriction DID) in its COS cannot
receive a call directly from a DID trunk. It is treated by the system as an ille-
gal number.l
Calls attempted using vacant or illegal numbers can be routed to answer-
ing points for completion; see ILLEGAL ACCESS INTERCEPT and VACANT
NUMBER INTERCEPT.l
DID trunks receive ringback tone when calling and camping onto a busy
device. They receive busy tone if they reach a busy device and no busy in-
tercept occurs (see DID/DIAL-IN/Tie INTERCEPTS) and the trunk cannot
camp on (see 
CAMPON).
0DID trunks ignore the DND feature if enabled on the called extension if
there is no Do Not Disturb Routing for the called extension’s tenant; also
see DID/DIAL-IN/Tie INTERCEPTS.l
DID trunks are answered before being connected to a recording device.l
If there is no DID rerouting, DID trunks ignore the DND that is enabled on
the called party, .l
The.attempt to call the destination is done only when the specified num-
ber of digits to to be received on the trunk have been received. Extra digits
are ignored and no matches are done for access codes that contain less
than the specified number of digits.l
Digits are absorbed before the prefix digits are inserted.
0The trunk may be programmed to ignore incoming DTMF digits, and rec-
ognize only rotary digits.
0A DTMF receiver is needed when a DID trunk originates. If there is no re-
ceiver available then the trunk waits indefinitely until a receiver is avail-
able. Digits received on the trunk are stored and processed when a receiver
is available. The Traffic Measurement feature can be used to track the wait
for receiver.
0If a seize error occurs on a DID trunk then the trunk is given reorder tone.
0Prefix digits are used for matching access codes only after the DID trunk
has dialed at least one digit that is not absorbed and the expected number
of digits have been received. The prefix digits by themselves cannot be
used to match an access code.
ProgrammingTo program a trunk to ignore incoming DTMF digits during origination of the
call, enable COS Option 801 (Incoming Trunk Call Rotary) for the trunk.
Program a DID trunk in CDE Form 15 (Dial-in Trunks).
OperationNoneTrunk Operation
- Direct Inward System Access (DISA)
Description3.111 This feature allows an external caller to access the system by dialing the
directory number of a special 
DISA trunk and then dialing a security code. Af-9 109-094-l 05-NA
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							Features Description
ter the code is dialed, the system returns dial tone to the caller, who may then
access features in the 
DISA trunk’s COS except those which require a switch-
hook flash.
Optionally, the external caller can be forced to enter a special account code
rather than the standard 
DISA access code.; see VERIFIED ACCOUNT CODES
(SPECIAL 
DISA).
DISA trunks can be supported on many different hardware types. See TRUNKSUPPORT-Tl,TRUNKSUPPORT-Tie,TRUNKSUPPORT-E&M.
A trunk can optionally be DISA during night service only.Conditions
The following conditions apply to this feature:
lAfter the trunk originates, the system waits a programmable time, and
then answers the trunk; then dial tone is returned.
lAfter the preprogrammed wait, the system answers the trunk before dial-
ing begins.
0 The outside caller must use a DTMF telephone.
lThe security code may be one to five digits in length.
lThe same security code applies to all DISA calls.
lIf a caller dials an invalid code, the call is dropped only after three digits
have been dialed. This makes it a bit more difficult for unwanted callers to
determine what the security code is. This does not apply when a verified
account code is 
used.
lReorder tone is not returned to the caller when an invalid security code is
dialed.
lSwitchhook flash is not possible on a DISA trunk.
lDISA trunks follow the illegal, do not disturb and vacant number routingas an internal industry-standard telephone would.
0A DISA trunk is given the same call progress tones as an internal extension.
lThe Alternate Trunk Recall feature applies to DISA trunks.
lIf a loop start CO trunk is the hardware supporting the trunk then loop
start interconnection rules apply and the restrictions on loop start COtrunks applies; see DEVICE INTERCONNECTION CONTROL and TRUNK OP-
ERATION 
- NON-DIAL-IN.
lIf the DISA trunk caller cannot complete a call then the caller must hang upand try again.
lIf there is no DTMF receiver available for dialing when the DISA trunk orig-
inates a call, the initial answer delay period is extended indefinitely until aDTMF receiver is available.
0No call progress tone is provided by the PABX to the trunk in the initial an-
swer delay period.105 3-1049 109-094-l 05-NAIssue 3Revision 1 
						

							System Features
lUp to seven digits can be absorbed from the trunk.
lAccess to the allowed features is controlled by the COS assigned to the
trunk.
0 The features available to DISA trunks include:
- account codes
- ARS
- console hold slot retrieve
- paging
- system abbreviated dial
ProgrammingIf the trunk is to be a 
DISA trunk during Night Service only, enable COS Op-
tion 810 (DISA During Night Service Only) for the trunk, and set the 
DISAtrunk DAY service routing in CDE Form 19 (Call Rerouting Table) for the
trunk’s tenant.
Select options for the 
DISA trunk type via CDE Form 13 (Trunk Circuit Descrip-
tors).
Select options for the specific 
DISA trunk via CDE Form 15 (Dial-In Trunks).
Assignment of a 
DISA circuit descriptor to a trunk changes the trunk to a DISAtrunk.
Assign a 
DISA access code to Feature 19 (Direct Inward System Access); see
ATTENDANT DISA CODE SETUP.Select the 
DISA answer timer via System Option 54 (DISAAnswer Timer: 1-8
Seconds).Enable COS 
Opti?? 812 (Loop Start Trunk to ACD Path Connect) to allow loop
start 
DISA trunks tb access the ACD feature.
Operation
To access the System:Dial the required directory number from a DTMF telephone.
The system waits the 
DISA answer time before answering the trunk and sup-
plying dial tone.
Dial the 
DISA security code -dial tone is returned again.
Dial the required feature access code or extension.
Trunk Operation 
- Non-Dial-in CO
Description
3.112 CO trunks are assumed to be external callers to the system. As such, theaudio given and how they are handled is different than for some other trunk
types. 
						

							Features Description
CO trunks are assigned an origination point for DAY, NIGHT 1, and NIGHT 2
service. They can optionally be assigned as a dedicated line on a 
SUPERSET
telephone.
For the hardware that supports CO trunk type operation, see TRUNK SUPPORT-CO(LS/GS),TRUNKSUPPORT-Tie,TRUNKSUPPORT-DID,TRUNKSUPPORT
-E&M, and TRUNK SUPPORT - Tl.
The NIGHT1 or NIGHT2 service for CO trunks can be changed directly from the
Attendant console; see FLEXIBLE NIGHT SERVICE.
Also see DIRECT-IN LINES.Conditions
The following conditions apply to this feature:
lA DISA trunk may be programmed to be a CO trunk type during day ser-
vice. See TRUNK OPERATION 
- DIRECT INWARD SYSTEM ACCESS (DISA).l
Connection checking is done between the trunk and the destination point
when the trunk originates.
lIf the trunk origination is blocked then the trunk stays idle and the PABX
does no further processing of the call.
lTrunks are always answered before listening to a recording device.
lThe processing of the origination follows the operation of call rerouting;
see CALL REROUTING.
lFor trunks assigned to DTS or Private Trunk lines, the trunk originates to
the line and ignores the NIGHT/DAY points programmed.l
The audio heard by the caller before answer depends upon the hardware/
circuit descriptor connected to that trunk. For CO trunks, CO tones pro-
vided by the Central Office are heard; for trunks, based on dial-in 
hard-
ware:ircuits, PABX call progress tones provided by the PABX are heard.
lThe trunk receives ringback tone when it camps on to a device.
l The Device Interconnection feature can be used to prevent loop start trunkinterconnection. 
’
lIf a CO trunk in a bay fails to get resources required for a call when it origi-
nates, the trunk will wait for resources to become available.
lIf the trunk is routed out to an external trunk call and the CO trunk has not
been answered yet, the CO trunk is answered when dialing is finished onthe outgoing trunk.
lCO trunks cannot dial ARS directly; however, ARS can be accessed via Sys-
tem Abbreviated Dial.
ProgrammingSelect options for the specific trunk circuits via CDE Form 14 (Non-Dial-In
Trunks) for incoming calls.
Enable COS Option 812 (Loop Start Trunk to ACD Path Connect) to allow loop
start trunks to access the ACD feature.105 3-1069109-094-l OS-NA
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							System Features
Refer to Practice 
9109-094-220-NA, Automatic Route Selection for the selec-tion of options for outgoing calls.
Operation
NoneTrunk Operation -Tie
Description
3.113 The Tie trunk type is one of the four trunk types, independent of the
hardware actually used to support the types, used in the system.
Tie trunks allow incoming trunk calls to reach extensions directly, without
Attendant intervention or assistance. The number of digits expected from the
trunk is unknown. Digit absorption and adding prefix digits can be done.
Calls coming into the PABX on Tie type trunks are assumed to-be callers from
inside the company, similar to 
DISA trunk type calls. The callers therefore re-
ceive the same call progress tones that internal callers hear and may have ac-
cess to many extension features.
For the hardware that supports the Tie trunk type operation, see TRUNK SUP-
PORT 
- E&M, TRUNK SUPPORT - Tl, and TRUNK SUPPORT - DIRECT INWARD
DIAL (DID).
See DIAL TONE DISABLE for dial tone control for the Tie trunk.Conditions
The following conditions apply to this feature:
lTie trunks have access to the following extension features:
- account code
- ARS
- console hold slot retrieve
- directed pickup
- hold retrieve
- paging
- system abbreviated dial
0For Tie intercept handling, see DID/DIAL-IN/Tie INTERCEPTS.
lTie trunks dialing extensions with Do Not Disturb enabled are handled in
the same way as extensions.l
Tie trunk dialing follows the same rules as for extensions.
lUp to 7 digits can be absorbed and 2 digits can be prefixed.
0The prefix digits are used for matching access codes only after the Tie
trunk has dialed at least one digit that is not absorbed. The prefix digits by
themselves cannot be used to match an access code.9 109-094-l 
OENAIssue 3Revision 1105 3-107 
						

							Features Descriptionl
The limit to the number of digits that a Tie trunk can dial is the same as for
an internal extension (25). This includes the prefix digits but not the ab-
sorbed digits.
0The trunk may be programmed to ignore incoming DTMF digits, and to
recognize only rotary digits.
lA DTMF receiver is needed when a Tie trunk originates. If there is no re-
ceiver available then the trunk waits indefinitely until a receiver is avail-
able. Digits received on the trunk are stored and processed when a receiver
is available. The Traffic Measurement feature can be used to track the wait
for a receiver.
lFor incoming answer supervision when directed to ARS, see TANDEM OP-
ERATION.
ProgrammingTo program a trunk to ignore incoming DTMF digits, enable COS Option 
801
(Incoming Trunk Call Rotary) for the trunk.
OperationNoneTrunk Support-CO 
(LUGS)Description
3.914 CO (LS/GS) trunks are supported with the CO Trunk card (in the analog
Peripheral bays) and the 
LS/GS Trunk card (in the digital bays) in the.
SX-ZOO DIGITAL PABX.
For loop start CO trunks that do not provide release supervision, take cautionwhen routing to Auto-Answer telephones or to 
UCD/ACD applications that
do not provide termination for a music/recording sequence. In these
cases,since the system does not disconnect the trunk, the call may stay up in-definitely.
Conditions
None
ProgrammingEnter the trunk into the system’s physical configuration table via CDE Form 01
(System Configuration).
Select options for the CO trunk type via CDE Form 13 (Trunk Circuit Descrip-
tars) .
Select options for the specific trunk circuits via CDE Form14 (Non-Dial-In
Trunks) for incoming calls.
Refer to Practice 
9109-094-220-NA, Automatic Route Selection for the selec-tion of options for outgoing calls.
Operation
None
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							System FeaturesTrunk Support 
- Direct Inward Dial (DID)
Description3.115 DID Trunks are supported in the SX-200 DIGITAL PABX. The following
types of DID trunks are supported:
l Wink Start
l Delay Dial
l Immediate Dial
DID trunks support Tie, CO, DID, and 
DISA operation.Conditions
The following conditions apply to this feature:
l Analog Bay DID trunks can be used outgoing.l
Digital DID trunk cards are incoming only.
0Digital DID trunk cards do not support DISA type operation.
ProgrammingEnter the trunk into the system’s physical configuration table via CDE Form 01
(System Configuration).
Select options for the DID trunk type via CDE Form 13 (Trunk Circuit Descrip-tors).
Select options for the specific trunk circuits via CDE Form 15 (Dial-In Trunks).Operation
NoneTrunk Support-E&M
Description
3.116 E&M trunks are supported with the E&M Trunk card (in the analog Pe-
ripheral bays) and the E&M Trunk module (on the Universal card, in the digi-
tal Peripheral bays).
The signaling schemes supported include: Type I and Type V, 2-wire or4-wire.
E&M trunks support Tie, CO, DID, and DISA operation.Conditions
None
ProgrammingEnter the trunk into the system’s physical configuration table via CDE Form 01
(System Configuration). 
						

							Features Description
Select options for the E&M trunk type via CDE Form 13 (Trunk Circuit Descrip-
tors).
Select options for the specific trunk circuits via CDE Forms 14 (Non-Dial-In
Trunks) and 15 (Dial-In Trunks).
OperationNoneTrunk Support 
- Tl
Description3.117 The SX-200 DIGITAL PABX supports Tl trunks. The link signaling used is
Tl D4 Channel Associated Signaling (CAS), also referred to as DS-1.
The PABX can be provided with a 
Tl clock module, that the system can adjust
to keep the system in phase with the incoming frame clock rate. This prevents
data losses due to clock rate differences. Refer to Practice 
9109-094-125-NAfor information on the Tl Clock Module.
Tl trunks support DID, Tie, CO and 
DISA type operation, on a per circuit basis.
Tl trunk circuits can be programmed to use various signaling schemes, based
upon the circuit descriptor, to provide various basic trunk types. Available sig-
naling schemes include: E&M, DID Loop-Tie, CO (loop and ground start),
DISA E&M, DISA DID Loop-Tie, DISA CO (loop or ground start):
The PABX automatically monitors various errors on a link and maintains a
24-hour sliding window for each link. Thresholds are programmable on a link
basis for these errors. When the thresholds are exceeded, based upon the
threshold type (maintenance, service, or network synchronization), the PABX
generates maintenance logs, removes the link from service, or causes the link
to not be used as a network synchronization source. Once the link is removed
from service or is removed from network synchronization, a programmable
timer starts. When this time is elapsed, if the link does not exceed a specified
number of errors, the link is again made available for use. All of this activity is
logged in maintenance and the cumulative error counts (24-hour basis) are
available in Maintenance error reports (refer to Practice 
9109-094-351-NA,RS-232 Maintenance Terminal).
The PABX provides for Stratum 3 or 4 clock source, and can be used in master
or slave mode. There is a programmable list of links to be used in network syn-
chronization, with each link backing up the other links, should the previous
link exceed the error thresholds (Slip Rates, Bit Error Rates (BER), and Framing
Losses) programmed in the link descriptors. There are three network synchro-
nization modes in the PABX: Auto, Manual, and 
Freerun. Auto mode is when
the PABX chooses the network synchronization source automatically. Manual
mode is when a link is specifically selected as the network synchronization
source (this only lasts for 24 hours, at which point the system reverts to auto
or 
freerun mode). Freerun mode is when there is no clock source or no link to
be used as a network synchronization source. The PABX changes modes based
on user actions, thresholds, and events on the Tl links. Maintenance logs
notify the installer of these changes.
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							System Features
There are two different states for a 
Tl trunk that is out of service, a yellow or
red alarm. A yellow alarm is the result of a link-based event. The link trans-
mits a yellow alarm condition on the link, which signals the far end that the
link is out of service. This is the action taken on the service threshold limits or
the reception of a yellow alarm condition from the far end.
A red alarm is based upon loss of synchronization on the link. Maintenance
logs are generated for any change in alarm status, and can be seen by using
the Maintenance SHOW STATUS command.
For information on 
Tl Link Descriptor options, refer to CDE Form 42 (Tl Link
Descriptors).
A link monitoring tool is available for troubleshooting 
Tl links, and for speci-
fying a manual network synchronization source. Refer to Practice
9109-094-351-NA, RS-232 Maintenance Terminal.
Refer to Practice 9109-094-125-NA, Circuit Card Descriptions for informationon 
Tl trunks.
Tl trunks are not available with Generic 1002.Conditions
The following conditions apply to this feature:
l There are 12 link descriptors available.
lThere can be up to 8 network synchronization sources for network syn-
chronization.
l One link provides 24 trunks.
lIf a link descriptor is not assigned (it is recommended that one is assigned)
then the default values in the link descriptors will apply. A link cannot be a
network synchronization source without a link descriptor.
lIf the last available network synchronization source specified is removed
from service then the PABX is put into free-run mode.
lWhen a network source link is returned to service or is again ready for use
as a network synchronization source, then the system will review the list of
network synchronization sources and possibly select the returned link (de-
pending upon the current network synchronization source and the order
of the links in the list).
lA link is removed from service immediately, regardless of activity on the
link, when its service threshold limits are exceeded.
lThe Tl Link Monitor feature is not available in maintenance until at least
one circuit is programmed (CDE forms 14 or 15) on a link in the PABX.
lThe Tl Clock Module clock rate is adjusted by the system if there are en-
tries made in CDE Form 44 (Network Synchronization) and one of the links
there is available. If no network synchronization source is available, then
the clock rate will not be adjusted by the PABX.
lThe threshold error counts are cleared when the Tl card is plugged in or
any of the values in the link descriptor assigned to the link are changed in
CDE Form 42 
(Tl Link Descriptors). A change in link status has no effect.9 109-094-l 05-NA
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							Features Description
l Changing the entries in CDE Form 44 (Tl Network Synchronization) will
override manual mode and change the PABX mode to 
freerun or auto.
lThe term link is synonymous with a Tl trunk card.
lThe normal maintenance busy-out feature applies to a circuit on a link
and not the link itself. The link remains active but the circuit(s) are dis-
abled.
ProgrammingEnter the trunk into the system’s physical configuration table via CDE Form 01
(System Configuration).
Specify options for the 
Tl link descriptors via CDE Form 42 (Tl Link Descrip-
tors).
Specify options for the 
Tl trunk types via CDE Form 13 (Trunk Circuit Descrip-
tars).
Specify options for specific trunk circuits via CDE Forms 14 (Non-dial-inTrunks) and 15 (Dial-in Trunks).
Assign link descriptors to the various Tl links via CDE Form 43 (Tl Link Assign-
ment).
If the 
Tl clock module is used, assign the primary and backup Tl links to be
used as sources for network synchronization via CDE Form 44 
(Tl Network
Synchronization). The order that the links are programmed in the form gives
the order in which the links are used as sources.Operation
None
Uniform Call Distribution (UCD)
Description3.118 Uniform Call Distribution (UCD) concentrates incoming trunk traffic
onto one or more special agent hunt groups. Trained operators (Agents) an-
swer the calls. If ail Agents are busy, the caller camps on and may be con-
nected to a recording hunt group, where the caller hears recorded announce-
ments. The caller retains his position in the queue. If the Agents are still busy
when the recording ends, the system connects the call to Music On Hold (if
provided). After a pre-determined time, the unanswered call is rerouted to a
designated answering point.
The call rings an agent immediately when one is available.Agents can log in and out of the agent hunt group to control the arrival of
calls from the agent hunt group (except with Generic 1002).
See RECORDING SUPPORT for details on recording devices.
For night service handling, trunk calls can be routed to a recording device di-
rectly; see INTERCEPT TO RECORDED ANNOUNCEMENT.105 3-1129 109-094-l 05-NA
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