Nortel QSY22 User manual

Message Center Description and operation
Meridian 1
Message Center
Description and operation
Document Number: 553-2691-100
Document Release: Standard 8.00
Date: August 1996
Year Publish FCCTM
© 1980, 1996
All rights reserved
Printed in the United States of America
Information is subject to change without notice. Northern Telecom reserves the right to make changes in design
or components as progress in engineering and manufacturing may warrant.This equipment has been tested
and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the
radio interference regulations of Industry Canada.These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment.This equipment
generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at their own expense.
SL-1 and Meridian 1 are trademarks of Northern Telecom.

Page iii of viii
Message Center Description and operation
Revision history
August 1996 Standard, Release 8.00. Reissued for X11 Release 22.0x.
December 1994 Standard, Release 7.00. Reissued to include editorial changes and indexing.
Due to the extent of the changes, revision bars are not used.
August 1993 Standard, release 6.00. Reissued to include changes for X11 Release 19.
December 1992 Standard, release 5.00. Reissued to include changes for X11 Release 18.
December 1991 Standard, release 4.00. This document is reissued to include technical content
updates. Due to the extent of changes, revision bars are not used.
December 1990 Standard, release 3.00. Reissued to include updates for X11 Release 16.
June 1990 Standard, release 2.00. Reissued for additional X11 Release 15 changes.
December 1989 Standard, release 1.00. Reissued for compliance with Northern Telecom
Standard 164.0 and to include updates for X11 Release 15.

Page v of viii
Message Center Description and operation
Contents
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Reference documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Incoming calls to the Message Center . . . . . . . . . . . . . . . . . . . . . . . . . 2
Direct message calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Indirect message calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Automatic Call Distribution (ACD) Message Center . . . . . . . . . . . 3
Telephone Message Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Attendant Message Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Message retrieval calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Placing a message retrieval call . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Answering a message retrieval call . . . . . . . . . . . . . . . . . . . . . . . . . 10
Direct Message Waiting lamp control . . . . . . . . . . . . . . . . . . . . . . . . . 11
Query and/or activate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Query and/or deactivate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Network Message Service (NMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Feature requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Message Waiting Indication (MWI) Interworking . . . . . . . . . . . . . . . . 14
Feature requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Equipment requirements . . . . . . . . . . . . . . . . . . . . 17
User telephones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SL-1 telephones with Message Waiting key/lamp pair . . . . . . . . . . 17
500 telephones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2500 telephones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Page vi of viii Contents
553-2691-100 Standard 8.00 August 1996
Standard 500/2500 and SL-1 telephones . . . . . . . . . . . . . . . . . . . . 18
Message Waiting lamp requirements . . . . . . . . . . . . . . . . . . . . . . . 18
Message Center telephones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SL-1 telephones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Attendant Consoles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Network Message Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
MWI Interworking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
System requirements . . . . . . . . . . . . . . . . . . . . . . . 23
QSY22 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
QSY19 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
QBL16 Power Distribution Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
PE cabinets and shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Line circuit cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Power supply installation . . . . . . . . . . . . . . . . . . . 35
QSY22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
QBL16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Feature interaction . . . . . . . . . . . . . . . . . . . . . . . . . 39
Message Center packaging . . . . . . . . . . . . . . . . . . 43

Page vii of viii
Message Center Description and operation
viii
List of figures
Figure 1
QSY22 Power Supply connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 2
QSY22 Power Supply circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 3
QSY19 Power Supply connections
(This unit is no longer available) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 4
QSY19 Power Supply circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 5
QBL16 Power Distribution Unit connections . . . . . . . . . . . . . . . . . . . 30
Figure 6
QBL16 Power Distribution Unit circuit diagram . . . . . . . . . . . . . . . . . 31

Page 1 of 48
Message Center Description and operation
16
Description
The Message Center allows an incoming trunk or internal call to be
automatically routed to a Message Center if it is not answered at the original
destination. The main functions of the Message Center are as follows:
— receive and take messages for calls forwarded to the Message Center
— convey messages to called telephones or consoles on request
— activate and deactivate Message Waiting Indication at users’ telephones
Automatic and manual diagnostics are provided to clear all active Message
Waiting Indications when required. Three types of Message Center
operations are offered:
— Automatic Call Distribution (ACD)
— SL-1 and Meridian digital telephone
— attendant
Depending on the packages equipped, you can have any Message Center
option or combination of Message Center.
Reference documentation
Please refer to the following Northern Telecom Publication for more
information:
— X11 Software input/output guide
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Page 2 of 48 Description
553-2691-100 Standard 8.00 August 1996
Incoming calls to the Message Center
Calls coming into a Message Center can be direct or indirect.
Direct message calls
The Message Center can be accessed by a direct message call, which can take
any of the following forms:
— An attendant extends a call to the message center.
— A 500/2500 telephone dials the Message Center DN.
— An SL-1 or Meridian digital telephone accesses the Message Center.
Indirect message calls
A call can be routed to the Message Center if it is not answered at the original
terminating telephone. This indirect call can take any of the following forms:
— A non-direct inward dial call encounters a no-answer condition so that
Call Forward No Answer (CFNA) is invoked, routing it to the Message
Center.
— A direct inward dial (DID) call encounters CFNA or Call Forward Busy
(CFB) and is routed to the Message Center.
— The Message Center Directory Number (DN) can be specified as a Hunt
or Call Forward DN for any telephone.
Operation
A Message Center can be organized in one of three ways:
— Automatic Call Distribution (ACD)
— SL-1 and Meridian digital telephone
— attendant
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Description Page 3 of 48
Message Center Description and operation
Automatic Call Distribution (ACD) Message Center
A special aspect of ACD is defined for optional use with Message Center.
Each telephone assigned to the ACD-type Message Center is equipped with
an ACD in-calls key/lamp pair. One Message Indication and one Message
Cancellation key/lamp pair must also be equipped if Message Waiting
Indication and control are required. Calls redirected to the Message Center
are queued in order of arrival and distributed to answering positions in the
same way ACD calls are distributed.
If all assigned positions are in the Make Busy mode, redirected calls and
message retrieval calls are forwarded to the night number specified for the
Message Center ACD DN. This DN can be the attendant, another Message
Center, or an outside number. Up to 240 Message Center ACD DNs can be
assigned per customer.
ACD Agent Position Increase, X11 Release 12 and later software This
software increases the number of ACD agent positions to 1200 for SL-1 NT
and XT machines.
X11 Release 15 and greater supports up to 1200 positions on the system
options 51, 61, and 71.
Before X11 Release 12, up to 240 agent positions are supported on the SL-1
VLE, XL, XN, and XT machines.
Before X11 Release 12, the SL-1 N, NT, and LE machines support 120 agent
positions.
As many as 70 agent positions are supported on the SL-1 M, S, MS, and ST
machines, and the system option 21.
If the appropriate ACD packages are equipped, an ACD Message Center can
support a full complement of ACD features. See Automatic Call Distribution
basic features description.
When an indirect message call is presented to a Message Center operator’s
telephone, the MSG IN-CALLS key flashes, and both the calling DN and
called DN are displayed. If the call originated from a trunk, the route and
member number of the trunk display instead of the calling DN.
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Page 4 of 48 Description
553-2691-100 Standard 8.00 August 1996
To answer the call, press the MSG IN-CALLS key. You can now take a
message or release as required.
If the caller wants to leave a message, take down the required information,
then pass it on to the called party. Press the MSG INDIC key to notify the
called party that they have a message waiting.
Press the RLS key to release the call. You rejoin the ACD queue when the
Message Center call is released.
When a Message Center call comes in and the called DN displays, the MSG
INDIC lamp at the operator’s telephone reflects the status of the called
telephone’s Message Waiting lamp as follows. If Audible Message Waiting
(AMW) is equipped in place of the lamp, interrupted dial tone indicates the
called party’s status.
— Steadily lit: If the operator’s MSG INDIC lamp is steadily lit, the
Message Waiting Indication at the called telephone is inactive.
— Fast flashing (60 ipm): If the operator’s MSG INDIC lamp is fast
flashing, then the Message Waiting Indication at the called telephone is
active.
— Slow flashing (30 ipm): If the operator’s MSG INDIC lamp is slow
flashing, the Message Waiting lamp at the called telephone is disabled or
not equipped. This state does not occur if the Message Waiting
Indication is by interrupted dial tone.
Telephone Message Center
The telephone’s Message Center has one or more display telephones sharing
a DN designated as the Message Center DN. An incoming call to the Message
Center is presented to all Message Center telephones at once. The first
operator to press the flashing MC DN key is connected to the call. If all
operators are busy, incoming message calls get the treatment as specified.
When you press the flashing MC DN key, you are immediately connected to
the caller. The display shows the originating DN (or trunk route and member
number) and terminating DN. If CPND is equipped, the names are displayed.
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Description Page 5 of 48
Message Center Description and operation
When a Message Center call comes in and the called DN displays, the MSG
INDIC lamp at the operator’s telephone reflects the status of the called
telephone’s Message Waiting lamp as follows. If Audible Message Waiting
(AMW) is equipped in place of the lamp, interrupted dial tone indicates the
called party’s status.
— Steadily lit: If the operator’s MSG INDIC lamp is steadily lit, the
Message Waiting indication at the called telephone is inactive.
— Fast flashing (60 ipm): If the operator’s MSG INDIC lamp is fast
flashing, then the Message Waiting Indication at the called telephone is
active.
— Slow flashing (30 ipm): If the operator’s MSG INDIC lamp is slow
flashing, the Message Waiting lamp at the called telephone is disabled or
not equipped. This state does not occur if the Message Waiting
Indication is by interrupted dial tone.
When an indirect message call is presented to a Message Center operator’s
telephone, the MSG IN-CALLS key flashes, and both the calling DN and
called DN are displayed. If the call originated from a trunk, the route and
member number of the trunk display instead of the calling DN.
To answer the call, press the MSG IN-CALLS key. You can now take a
message or release as required.
If the caller wants to leave a message, take down the required information and
pass it on to the called party. Press the MSG INDIC key to notify the called
party that they have a message waiting.
Press the RLS key to release the call. You return to normal telephone
operations until the next Message Center call appears.
All telephones have Message Waiting capability, and any SL-1 or Meridian
digital telephone (except the M3000) can function as a Message Center. The
DN used for message taking should be the prime DN if the Message Waiting
lamp Indication and Cancellation are desired. Calls are redirected to the
telephone-type Message Center using message forwarding. Since this is a
normal DN, calls are not queued.
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Page 6 of 48 Description
553-2691-100 Standard 8.00 August 1996
A telephone with Message Waiting may be equipped with a key/lamp pair
that notifies you when a message is waiting. When this key is pressed, you are
connected with the Message Center.
500/2500telephones with MessageWaiting Allowed Classof Service maybe
equipped with a neon lamp for visual indication. These telephones must
dial-access the Message Center.
A telephone without a Message Waiting lamp, except the M2317, can be
informed that a message is waiting by Audible Message Waiting (AMW)
(Prime DNs and Single Appearance DNs only). A special Message Waiting
tone is heard each time you go off hook until the Message Waiting Indication
is canceled by the Message Center operator. Calls can be originated and
received with the tone activated.
Each telephone with a Message Waiting Allowed Class of Service is assigned
to a specific Message Center. Unanswered calls are automatically routed to
that Message Center. There is no upper limit to the number of telephones that
can be assigned to any Message Center.
Attendant Message Center
An attendant Message Center has up to 15 Attendant Consoles in a system
handling messages, in addition to their normal functions as attendants.
Incomingmessage calls canaccess anattendant Message Centerin oneof two
ways: a phantom Message Center DN or normal attendant access.
Phantom Message Center DN This method requires the presence of the
ACD package in the system. The ACD DN for this feature has no agents
assigned to it. Any message calls coming into it are automatically transferred
to the attendant and appear on a MSG CENTER Incoming Call Indicator
(ICI) key. The Message Center DN established in this way is thus a phantom
Message Center DN.
When a message call appears at an Attendant Console through a Message
Center DN, the MSG CENTER ICI lamp flashes, and the display shows the
originating DN (or trunk route and member number) and terminating DN. If
Call Party Name Display (CPND) is equipped, the names are shown instead
of the DNs.
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Description Page 7 of 48
Message Center Description and operation
When a Message Center call comes in and the called DN displays, the MSG
INDIC lamp at the operator’s telephone reflects the status of the called
telephone’s Message Waiting lamp as follows. If Audible Message Waiting
(AMW) is equipped in place of the lamp, interrupted dial tone indicates the
called party’s status.
— Steadily lit: If the operator’s MSG INDIC lamp is steadily lit, the
Message Waiting Indication at the called telephone is inactive.
— Fast flashing (60 ipm): If the operator’s MSG INDIC lamp is fast
flashing, then the Message Waiting Indication at the called telephone is
active.
— Slow flashing (30 ipm): If the operator’s MSG INDIC lamp is slow
flashing, the Message Waiting lamp at the called telephone is disabled or
not equipped. This state does not occur if Message Waiting Indication is
by interrupted dial tone.
When you press a free LPK key or the flashing MSG CENTER ICI key, you
automatically connect to the incoming call. If the caller wants to leave a
message, take down the required information and pass it on to the called
party. Press the MSG INDIC key to notify the called party that they have a
message waiting.
Press the RLS key to release the call. You return to normal telephone
operations until the next Message Center call appears.
Normal attendant access If a phantom Message Center DN has not been
established on an Attendant Console ICI key, the attendant must determine
verbally that this is a message call. In this case, the MSG INDIC lamp does
not show the state of the called party’s Message Waiting Indication. After the
call is released, the attendant can provide a Message Waiting Indication by
directly accessing the called party’s telephone.
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Page 8 of 48 Description
553-2691-100 Standard 8.00 August 1996
Message retrieval calls
All telephones have Message Waiting capability, and any SL-1 or Meridian
digital telephone (except the M3000) can function as a Message Center. The
DN used for message taking should be the prime DN if Message Waiting
lamp Indication and Cancellation are desired. Calls are redirected to the
telephone-type Message Center using Message Forwarding. Since this is a
normal DN, calls are not queued.
A telephone with Message Waiting may be equipped with a key/lamp pair
that notifies you when a message is waiting. When this key is pressed, you are
connected with the Message Center.
500/2500telephones with MessageWaiting Allowed Classof Service maybe
equipped with a neon lamp for visual indication. These telephones must Dial
Access the Message Center.
A telephone without a Message Waiting lamp, except the M2317, can be
informed that a message is waiting by Audible Message Waiting (AMW)
(Prime DNs and Single Appearance DNs only). A special Message Waiting
tone is heard each time you go off hook until the Message Waiting Indication
is canceled by the Message Center operator. Calls can be originated and
received with the tone activated.
Message indication at a called telephone can take the following forms:
SL-1 and Meridian digital telephones with a key/lamp pair The lamp
associated with the MSG WAITING key indicates that a message is waiting
at the Message Center.
500/2500 telephones with a Message Waiting lamp A Message Waiting
lamp on the telephone indicates that a message is waiting at the Message
Center.
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Description Page 9 of 48
Message Center Description and operation
Telephones Without a Message Waiting lamp As an option in X11
Release 2, Message Waiting Indication can be provided by AMW (a 120 ipm
interrupted dial tone) instead of a Message Waiting lamp, or key/lamp pair
when the user goes off hook at the telephone. A faulty Message Waiting lamp
does not result in Message Waiting Indication by interrupted dial tone; in this
case, it is up to the user to call the Message Center to see if there is a message.
Telephonesequipped withneither MessageWaiting lampsnor AMWhave no
visual indication that a message is waiting. It is up to the user to call the
Message Center to see if a message is waiting.
Regardless of whether message indication is by lamp or AMW, the user can
still make calls and operate features normally. The Message Indication
remains active until canceled by a Message Center operator or by the system
during a night routine.
Placing a message retrieval call
SL-1sets The user goes off hook and presses the MESSAGE WAITING key.
The digit display shows the Message Center DN. The Message Center
answers and gives the user the message, then extinguishes the user’s Message
Indication lamp. The user then goes on hook. The user can also access the
Message Center by going off hook and pressing the MESSAGE WAITING
key even if the associated lamp is not flashing.
If message indication is by AMW, the user goes off hook and dials the
Message Center DN. The Message Center operator cancels the AMW in the
same way as a Message Waiting lamp.
500/2500 Telephones Whether or not a message indication lamp is provided
with the telephone, the user goes off hook and dials the Message Center DN.
The Message Center answers and gives the user the message, then
extinguishes the user’s Message Indication lamp. If message indication was
provided by interrupted dial tone, this is canceled by the Message Center
operator in the same way as a Message Waiting lamp. The user then goes
on hook.
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Page 10 of 48 Description
553-2691-100 Standard 8.00 August 1996
Answering a message retrieval call
ACD Message Center
The message retrieval call is presented on the MSG IN-CALLS key of a
Message Center SL-1 telephone, and the digit display shows the DN of the
calling telephone. The MSG CANC lamp reflects the state of the caller’s
Message Waiting indication as follows:
— Steadily lit: The Message Waiting Indication at the calling telephone is
inactive.
— Fast flashing (60 ipm): The Message Waiting Indication at the calling
telephone is active.
— Slow flashing (30 ipm): The Message Waiting lamp at the calling
telephone is either disabled or not equipped. This state does not occur if
Message Waiting Indication is by interrupted dial tone.
To answer the call, the Message Center operator presses the MSG IN-CALLS
key. If the Message Center is equipped with Call Forcing, the call is answered
automatically. The operator gives the caller the message. If the MSG CANC
lamp is flashing, the operator presses the MSG CANC key to deactivate the
caller’s Message Waiting Indication. The operator then presses the RLS key
to release the call.
DN Message Center
The message retrieval call is presented on the MC DN key of a Message
Center SL-1 telephone. The Message Center operator answers the call by
pressing the MC DN key. The digit display shows the calling DN, and the
MSG CANC lamp indicates the state of the calling telephone’s message
Waiting Indication in the same way as for an ACD-type Message Center. The
procedures for deactivating Message Waiting Indication are the same as for
an ACD Message Center.
Attendant Message Center
The presentation of a direct message call to an Attendant Console depends on
whether a Phantom Message Center DN has been assigned to an ICI key
(Phantom Message Center DN), or the user must dial the attendant as in a
normal attendant call (Normal Attendant Access).
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Description Page 11 of 48
Message Center Description and operation
The Phantom Message Center ACD DN is assigned to overflow to the MSG
CENTER ICI key on the Attendant Console. When a direct Message Center
call comes into the console, the MSG CENTER ICI key flashes. To answer
the call, the Message Center operator presses the MSG CENTER ICI key or
a free LPK key. The procedures for deactivating a Message Waiting indicator
are the same as for an ACD-type Message Center.
With Normal Attendant Access, the attendant must determine verbally that
this is a message retrieval call. During the call, the MSG CANC key does not
show the state of the user’s Message Waiting lamp. After the call is released,
the attendant must deactivate Message Waiting Indication directly.
Direct Message Waiting lamp control
The Message Center operator must directly access a telephone to activate or
deactivate Message Waiting Indication in the following cases:
— if the telephone is calling an Attendant Message Center by direct access.
— if the telephone is not currently in contact with the Message Center.
The Message Center operator must first release or place on hold all calls In
an ACD-type Message Center, the NOT READY key must be activated. The
operator then decides whether the telephone’s Message Waiting Indication is
to be activated or canceled.
Query and/or activate
The operator presses the MSG INDIC key, and the associated lamp lights.
The operator then dials the DN. No Ringback is heard, but the state of the
MSG INDIC lamp reflects the state of the user’s Message Waiting lamp (or
interrupted dial tone) as follows:
— Steadily lit: The user’s Message Waiting Indication is inactive.
— Fast flashing (60 ipm): The user’s Message Waiting Indication is active.
— Slow Flashing (30 ipm): The user’s Message Waiting lamp is either
disabled or not equipped. This state does not occur if Message Waiting
Indication is by interrupted dial tone.
Here, the operator can change the state of the user’s Message Waiting
Indication from inactive to active with the MSG INDIC key. The connection
is released when the Message Center operator uses the RLS key.
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Page 12 of 48 Description
553-2691-100 Standard 8.00 August 1996
Query and/or deactivate
The operator presses the MSG CANC key, and the associated lamp lights.
The operator then dials the DN. No Ringback is heard, but the state of the
MSG CANC lamp reflects the state of the user’s Message Waiting Indication
in the same way as the MSG INDIC lamp previously described.
At this point, the operator can change the state of the user’s Message Waiting
Indication from active to inactive by pressing the MSG CANC key, or the
indication can be left as it is. The connection is released when the Message
Center operator presses the RLS key.
Network Message Service (NMS)
With X11 Release 15 and later, centralized Message Centers are now
provided for all switches in ISDN PRA or ISL networks. Network Message
Service (NMS) functions allow access to Message Centers (MC) across a
network, while remaining transparent to the user. The application is referred
to as the Network Message Service—Message Center (NMS-MC).
Three types of Message Centers are supported:
— ACD-type Message Centers
— DN-type Message Centers
— Attendant Console Message Centers
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Description Page 13 of 48
Message Center Description and operation
Feature requirements
The Network Message Service (NMS), package 175 requires the Message
Center, package 46, for support.
NMS requires all the packages necessary to support the Integrated Services
Digital Network (ISDN), with package 148 as a minimum.
Network Message Services in the Meridian Mail environment require the
following packages:
— Originating switch
• End to End Signaling (EES) (10)
— Terminating switch
• Integrated Messaging System (IMS) (35)
• End to End Signaling (EES) (10)
• Command Status Link (CSL) (77)
Message Centers in the ACD environment require the ACD packaged
options:
— Basic ACD (40)
— ACD package A (45)
— ACD package B (41)
— ACD package C (421)
The user network must be equipped with either the Uniform Dialing Plan
(UDP) or the Coordinated Dialing Plan (CDP).
NMS does not support Public Numbering Plans or Multiple Message Center
interworking.
Implementation
For a complete description of the steps to operate and implement Network
MessageServices, refer to ISDNPrimary Rate Interfaceadministration .Also
refer to the X11 Software input/output guide for a complete description of the
prompts and responses available.
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Page 14 of 48 Description
553-2691-100 Standard 8.00 August 1996
Message Waiting Indication (MWI) Interworking
With X11 Release 19, centralized message services are now provided for a
corporate network, consisting of Meridian 1 and Centrex (DMS-100)
systems. This means that a user on a Meridian 1 system can directly access
the voice message system on a DMS-100 and vice versa. MWI Interworking
allows either one of the two configurations listed below:
— The Meridian 1 system hosts the Message Center and serves both
Meridian 1 and DMS-100 users in the same customer group or corporate
network.
This configuration enables DMS-100 private or public network callers to
leave messages for subscribers on the Message Center connected to the
Meridian 1 system. The Meridian Message Center then initiates a facility
message to turn on the Message Waiting Indicator at the subscriber’s
station, located either on a Meridian 1 system or on a DMS-100 system
within the same customer group. The subscriber can then retrieve the
messages, and the Message Waiting Indicators will automatically turn
off (accomplished via a facility message initiated from the host switch to
the remote switch where the subscriber resides) when retrieval is
complete.
— The DMS-100 system hosts the Message Center and serves both
Meridian and DMS-100 users in the same customer group.
This configuration enables Meridian private or public network callers to
leave messages for subscribers on the Message Center connected to the
DMS-100 system. This configuration then functions in the same way as
the Meridian 1 system host configuration.
Note: These configurations enable one or more Meridian and one or
more DMS-100 customer locations to be connected directly or in tandem
through Meridian 1 or DMS-100 systems to the Meridian 1 or DMS-100
directly supporting the Message Center. The connections between the
switches must be ISDN.
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Description Page 15 of 48
Message Center Description and operation
Feature requirements
MWI Interworking requires the following for each node:
— Originating node (the node that has Message Center users)
• NMS package 175
• ISDN Signaling package 145
• ISDN Primary Rate Access package 146 or ISDN Signaling Link
package 147
• ISDN Network Service package 148
• MWC package 46
• EES package 10
• MWI package 219 (if connected to a DMS-100, SL-100, or
DMS-250 switch)
Note: DMS-100 and SL-100 must run with BCS 36 or above loaded.
— Host node (the node that hosts the Message Center)
• NMS package 175
• IMS package 35
• ISDN/AP package 77
• BACD package 40
• ACDA package 45
• ISDN Signaling package 145
• ISDN Primary Rate Access package 146 or ISDN Signaling Link
package 147
• ISDN Network Service package 148
• MWC package 46
• EES package 10
• MWI package 219 (if connected to a DMS-100, SL-100, or
DMS-250 switch)
• Release 19 software
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