Nortel M5208 Meridian User manual

297-2011-213
DMS-100 Family
M5208 Meridian Business Set
Description, Installation, Operation, and
Maintenance Manual
Release 02.01 Standard February 1999

DMS-100 Family
M5208 Meridian Business Set
Description, Installation, Operation, and
Maintenance Manual
NTP: 297-2011-213
Document status: Standard
Version: 02.01
Date: February 1999
© 1999 Northern Telecom
Printed in Canada
NORTHERN TELECOM CONFIDENTIAL: The information contained in this document is the property of Northern
Telecom. Except as specifically authorized in writing by Northern Telecom, the holder of this document shall keep the
information contained herein confidential and shall protect same in whole or in part from disclosure and dissemination to third
parties and use same for evaluation, operation, and maintenance purposes only.
The following are trademarks of Northern Telecom: Nortel, the Nortel globemark, DMS-100, Meridian.

iii
Publication history
297–2011–213 02.01 Standard February 1999
October 1996
Release 01.01. Standard version for NA004 and up.
February 1999
Release 02.01. Standard version changed from NA004 and up to CCM04 and
up.

iv Publication history
297–2011–213 02.01 Standard February 1999

v
Contents
297–2011–213 02.01 Standard February 1999
Publication history iii
Chapter 1: Introduction 1-1
General description 1-1
Physical characteristics 1-2
Other documentation 1-2
Chapter 2: Specifications 2-1
Environmental and safety considerations 2-1
Temperature 2-1
Relative humidity 2-1
Electromagnetic interference 2-1
Atmospheric pollution 2-1
Vibration 2-2
Shock 2-2
Line engineering 2-2
Chapter 3: Operations and features 3-1
Basic operations 3-1
Peripheral equipment 3-1
Acoustics 3-1
Power 3-1
Alphanumeric display 3-2
Description of features 3-3
Basic features 3-5
Additional features 3-5
Features operation 3-6
Available features 3-7
Local tones 3-7
Switch generated tone characteristics 3-8
Chapter 4: Installation 4-1
Installing the M5208 4-1
Wall mounting the M5208 4-4

vi Contents
297–2011–213 02.01 Standard February 1999
Chapter 5: Verification procedures 5-1
Verification test routines 5-1
Maintenance 5-1
Loop check 5-1
Polarity check 5-2
Station Ringer test 5-3
Chapter 6: Replacement parts 6-1
Figures
Figure 3-1 M5208 keys and other components 3-2
Figure 4-1 M5208 bottom view 4-2
Figure 4-2 M5208 wall mounting locations 4-4
Figure 4-3 M5208 base attachment 4-5
Figure 4-4 Handset retainer installation 4-6
Figure 4-5 Final wall position 4-6
Figure 5-1 Feature/line key and LCD assignments 5-6
Tables
Table 3-1 Summary of M5208 keys and indicators 3-4
Table 3-2 Switch generated tones 3-8
Table 6-1 Ordering information 6-1

1-1
Chapter 1
Introduction
297–2011–213 02.01 Standard February 1999
General description
The M5208 Meridian Business Set is designed for direct connection (through
a non-loaded subscriber loop pair) to the Northern Telecom DMS–10, DMS–
100, DMS–250, or Meridian SL–100 Digital Switching systems.
The M5208 is loop powered and works with a maximum loop length of
4,572 m (15,000 ft) of 26 AWG standard twisted pair telephone wires,
subject to Line Engineering Rules, NTP 297–2011–180.
The service provided by the M5208 substitutes low-level signals over a half-
duplex, above-voice band (8 kHz) signalling channel for the traditional loop
signalling (dial pulse) or inband tone signalling (DTMF tones) on a
conventional subscriber loop. In addition to signalling and supervision,
messages on the above-voice band signalling channel include signals for
implementing the many special features available on the M5208, as well as
display characters.
The M5208 offers a choice of selected key and system features—it has 3
fixed keys, a dial pad consisting of 12 fixed keys, 8 programmable feature
and/or directory number keys with LCD indicators, and is equipped with a
speaker for alerting tones, on-hook dialing and intercom.
The alphanumeric display module is mounted at the rear top edge of the
telephone and is hinged so that the viewing angle can be adjusted physically
to reduce glare and maximize the contrast. The maximum display capacity
of the display screen is 2 rows of 24 characters each.

1-2 Introduction
297–2011–213 02.01 Standard February 1999
Physical characteristics
Figure 3-1 shows the main components of the M5208. The set comes in
three different colours:
• Chameleon-grey (Engineering code NT4X41AA)
• BTS light-grey (Engineering code NT4X41BA)
• Black (Engineering code NT4X41CA)
The Mean Time Between Failure (MTBF) for the M5208 is at least 100
years.
Other documentation
Other information pertaining to Meridian Business Sets can be found in the
following documents:
297–2001–100 Integrated Business Network (IBN) —Description
297–1001–114 Operational Measurements (OM)
297–1001–250 Testing and Acceptance for Initial Installation
297–1001–310 Table Editors User Guide
297–1001–518 Operational Measurements—Man-Machine Interface
297–2011–180 DMS-100 Business Set—Line Engineering Rules
P0749049 Meridian Business Set User Guide (English/French)
P0800728 Meridian Business Set User Guide (Spanish)

2-1
Chapter 2
Specifications
297–2011–213 02.01 Standard February 1999
The following specifications govern the performance of the M5208 Business
Set and the environmental conditions under which this performance is
achieved.
Environmental and safety considerations
The M5208 meets the Canadian and U.S. mandatory interconnect
requirements for Telephone Equipment, CSA, DOC, UL, FCC (part 15 &
part 68).
Temperature
In the Operating State, the M5208 temperature range is 0°C to 50°C
(32°F to 122°F).
In the Non-Operating State, the M5208 temperature range is -20°C to 70°C
(-6°F to 158°F).
Relative humidity
20% to 95% (non-condensing). At temperatures above 34°C (93°F), relative
humidity is limited to 52mbar of water vapour pressure.
Electromagnetic interference
The radiated and conducted electromagnetic interference meets the
requirements of Subpart J of Part 15 of the FCC rules for class B computing
devices.
Atmospheric pollution
The M5208 is designed to withstand normal atmospheric conditions
throughout its life and during shipment and storage as defined in the
International Electromechanical Commission (IEC) document 50 (salt, mist,
atmospheric dust, sulfur dioxide, and hydrogen sulfide exposure).

2-2 Specifications
297–2011–213 02.01 Standard February 1999
Vibration
The M5208 is designed to work to specifications after being subjected to the
following vibrations in each of three orthogonal directions for 90 minutes:
• Vibration frequency of 5 Hz to 500 Hz
• Maximum half displacement 0.35mm (0.014 in)
• Maximum acceleration 1.5m/s/s.
Shock When packaged, the M5208 is designed to withstand normal handling during
shipment.
When unpacked, the M5208 is designed to withstand accidental dropping
during normal use, without sustaining damage, as specified below:
• Telephone: when dropped on any face or corner from a height not
exceeding 0.75m (30in)
• Handset: when dropped from a height not exceeding 1.5m (60in)
Line engineering
The M5208 operates to its full potential through twisted pair wiring on
transmission lines selected by the rules provided in NTP 297–2011–180.

3-1
Chapter 3
Operations and features
297–2011–213 02.01 Standard February 1999
Basic operations
The M5208 Meridian Business Set can be used to make voice calls and
operate selected DMS–10, DMS–100, or Meridian SL–100 features. All
supported features can be accessed using keys provided on the M5208. For
further details about software requirements, refer to NTP 297–2011–100 and
NTP 297–1001–310 respectively. Dial pad, DN, and feature key layout is
shown in Figure 3-1.
Note that the M5208 must not be assigned as a maintenance set.
Before attempting to operate the M5208, please refer to the M5208 Meridian
Business Set User Guide. This document is shipped with the set and contains
instructions for making calls and how to use various features.
Peripheral equipment
The M5208 interfaces with the business set (6X21AC) line card in the Line
Concentrating Module (LCM) of the DMS-10/DMS–100/Meridian SL-100
Central Office (CO) equipment. The 6X21AC supports one business set per
line card.
Acoustics
A speaker is used for alerting tones, call monitoring (on-hook dialing) and
intercom.
Power The M5208 is entirely loop powered by a balanced 440 Ohm battery feed
from the switching equipment. The switch battery voltage supplied to the
loop is nominally 52 VDC with a minimum of 42.75 VDC and a maximum
of 56 VDC.

3-2 Operations and features
297–2011–213 02.01 Standard February 1999
The current drawn from the loop is 16 ±1mA when the set is active. The
current drawn from the loop is 10 ±1mA when the set is inactive.

Operations and features 3-3
297–2011–213 02.01 Standard February 1999
Alphanumeric display
The M5208 display screen allows access to the following features:
Called Number Display/Called Name Display
The display of the called number (or name of the party being called, when
available) is always activated as dialing takes place.
Calling Number Display/Calling Name Display
The calling number (or name of the calling party, when available) for calls
originating within the same switch is displayed when the first ringing tone
sounds for an incoming call at the Prime DN. If the incoming call terminates
at a secondary DN, the number is displayed only after lifting the receiver.
Query Time and Date
One of the feature keys must be assigned for accessing the QTD display.
That key should be labelled Time/Date for easy identification.
Feature programming and usage
The display screen shows important information and prompts when using or
programming M5208 features.

3-4 Operations and features
297–2011–213 02.01 Standard February 1999
Description of features
The M5208 Business Set (see Figure 3-1) is characterized by the following:
• there are 15 fixed keys with no LCD indicators: Release key (1), Hold
key (1), volume key (1), dialpad keys (12)
• there are eight assignable key/LCD indicator pairs.
The operation of these keys and other components is summarized in
Table 3-1.
Figure 3-1
M5208 keys and other components
Alerter
Speaker
Handset
Release key
Hold key
LCD Feature/ Line
indicator
Volume key
Feature/line keys
Prime Directory
Number key
Dialpad
Display

Operations and features 3-5
297–2011–213 02.01 Standard February 1999
Table 3-1
Summary of M5208 keys and indicators
Key or indicator Description
Speaker Monitors the progress of a call without lifting the handset.
Handset Used for talking on the phone—automatically selects the
prime directory number when lifted.
Display Shows call and installation information.
Alerter Flashes to indicate incoming calls.
Dial pad Used for entering numbers and the or keys.
Volume key Adjusts the volume of the ring and the speaker.
Releases a call without replacing the handset.
Puts a call on hold.
8 Feature/line
keys Acts as line key or as a feature key depending upon how the
set is programmed.
LCD Indicators
No half diamond
(Off)
Steady half
diamond (On)
Slow flashing half
diamond (60IPM)
Fast Flashing half
diamond
(120IPM)
Indicates the status of the feature/line keys:
Feature or line is not active.
Feature or line is active.
Line is ringing or feature is being programmed.
Line is on hold .
#
✶
Rls
Hold

3-6 Operations and features
297–2011–213 02.01 Standard February 1999
Basic features
Every M5208 set has the basic features described below.
Automatic Prime Directory Number (PDN) selection
Allows the user to select the prime DN (i.e. the DN assigned to the first
feature/line key) by going off-hook to answer a call without pressing a DN
key.
On-hook dialing
Allows the user to select a line and dial the call without lifting the handset.
Once the party answers, the handset must be lifted to speak.
Listen on hold
Activated by pressing the Hold key (associated LCD flashes), placing the
handset back in its cradle, and re-selecting the line to be monitored
(associated LCD on).
Alerting tones
Warble tone sounds when the telephone is on-hook, 500 Hz local buzzer tone
sounds when the telephone is off-hook and the associated LCD indicator
flashes.
Additional features
In addition to the basic features, the M5208 has a 2 row by 24 character
alphanumeric display.

Operations and features 3-7
297–2011–213 02.01 Standard February 1999
Features operation
The fixed keys on the M5208 Business Set provide these permanent
functions:
• dialing using the dialpad
• call hold
• call release
• volume control
Dialpad
Before a call is established, no tone-feedback is provided when the dialing
keys are being pressed. After a call has been established, end-to-end
signalling using CO generated DTMF tones is enabled.
Hold
The hold function has two modes of operation—manual and automatic. With
the user engaged in a call, the call can be put on hold either by pressing the
key or by pressing another DN key. In either case, the DN LCD
changes from ON to winking and the user is free to answer or make another
call.
Release
The (Release) key performs a similar function as going on-hook (i.e.
when pressed, it terminates a call). The DN LCD associated with the
released call changes from ON to OFF, but the status of the Set remains off-
hook to the switch.
Volume control
The loudness of any sound which comes through the speaker (i.e. ringing,
dial tone, busy tone and on-hook monitoring) is controlled by one key with
two toggle positions. Tapping the key at the right hand side increases the
volume while tapping it at the left-hand side decreases it. Each time the key
is pressed, the volume level changes one step, as shown on the volume bar
display (there are seven volume levels).
The volume for ringing tones can only be adjusted while alerting is in
progress and is automatically stored at the new level. The on-hook monitor
volume level can be adjusted and automatically stored while monitoring.
If the M5208 Business Set is disconnected from the line and then
reconnected, all volume settings return to the original factory default values
(Mid-point setting for alerting tones and minimum setting for on-hook
monitoring).
Hold
Rls

3-8 Operations and features
297–2011–213 02.01 Standard February 1999
Available features
Feature key 1 is always assigned to the Prime Directory Number (PDN). If
more than one Directory Number (DN) is available, additional feature keys
can be assigned to these DNs progressing from feature key 1 to feature key 2
and so on. Any remaining feature keys can be assigned a subset of a number
of features. Examples of some of the available features are given as follows:
• Automatic Dial (AUD)
• Automatic Line (AUL)
• Busy Override (EBO)
• Call Forward (CF)
• Call Park (PARK)
• Call Pickup (CPU)
• Call Waiting (CWT)
• Directed Call Park (DCP)
• Directory Numbers (DN)
• Group Intercom (GIC)
• Individual Business Line
• Intercom (ICM)
• Make Set Busy (MSB)
• Malicious Call Hold (MCH)
• Message Waiting (MWT)
• Multiple Appearance Directory Numbers (MADN)
• Privacy Release
• Ring Again (RAG)
• Set Busy Indicator (SBI)
• Speed Calling (SCS, SCL, or SCI)
• 3-way Calling/Call Transfer (TWC/CXR)
• 6-port Conference (CONF 6)
Local tones
A locally generated buzzer (500 Hz) tone is utilized for call waiting and off-
hook alerting. All other telephony tones are provided by switching
equipment from a Tone Card.

Operations and features 3-9
297–2011–213 02.01 Standard February 1999
Switch generated tone characteristics
The various tones heard on the M5208 are defined in Table 3-2.
Table 3-2
Switch generated tones
Tone Characteristic
Ringing Interrupted warble tone, typically 2 seconds on, 4 seconds
off.
Busy Interrupted tone, 1 second on, 1 second off.
Call Waiting Short burst of buzzer (500 Hz), 10 second intervals.
Confirmation Three short bursts of tone, not repeated. This tone informs
the user that the feature requested has been implemented.
This tone is present only when the feature access code is
dialed.
Dial Continuous tone consisting of 2 frequencies.
Reorder Interrupted tone, 1/2 second on, 1/2 second off. This tone
informs the user of unavailable feature, all trunks busy, illegal
code, etc.
Ring Again Sort burst of buzzer tone (500 Hz) once only to inform the
user that the previously busy station opt trunk line is now
free.
Special Dial Three short bursts of dial tone, followed by a continuous dial
tone. This tone informs the user that the dialed features (e.g.
call forwarding) has been activated and further digits can now
be dialed.

4-1
Chapter 4
Installation
297–2011–213 02.01 Standard February 1999
Installing the M5208
Before installing the M5208, check the package contents and cables, as
described below. To install the M5208, follow procedure 4-1. If the M5208
needs to be mounted on the wall, follow procedure 4-2.
Unpacking or packing
Use proper care while unpacking any M5208 set. Check for damaged
containers so that appropriate claims can be made to the transport company
for items damaged in transit.
If a telephone must be returned to the factory, make sure it is packed in its
original container to avoid damage during transit. Remember to include all
loose parts in the shipment (e.g. cords and handset).
Cables
CAUTION
Polarity Sensitivity
Cable connections for the M5208 are polarity sensitive.
A polarity reversal will cause the set to fail.
Installation requires you to plug in cords to the Teladapt jacks that are
accessible in the base of the telephone. Cord restraining tabs are provided for
security. Make the necessary connections to the Teladapt connecting block
(Tip [+] green lead and Ring ([-] red lead), and plug the line cord into the
Teladapt jack. Continue with the installation instructions provided on the
following page.
The required jack is an RJ11 c/w.