Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1317 Distinctive Ringing 
20
Distinctive Ringing
Distinctive Ringing provides several ringing cycles to help telephone users and 
attendants distinguish between incoming call types. Administer Distinctive 
Audible Alerting on Feature-Related System Parameters for internal, external, 
priority, and attendant originated calls. 
If the phone is a single-line analog, you have to set this on the Station screen for 
each user.
Detailed description
You can administer system-wide distinctive-ringing cycles for the three basic call 
types. Most installations use 1-burst for internal calls, 2-burst for external calls, 
and 3-burst for priority calls. There are also non-administrable ringing signals for 
Automatic and Dial Intercom calls, Manual Signaling, and Redirect Notification. 
Normally if an internal phone user transfers an external call, the call rings as 
internal. You can set a feature parameter (Update Transferred Ringing Pattern) to 
make the call ring as an external call. 
Considerations
nIf Distinctive Ringing is disabled, the system generates a 1-burst repetitive 
tone for all incoming calls. This is useful for equipment interfaced by 
analog lines, especially if you use off-premises station.
nA single distinctive ring cycle is used for each new incoming call to an 
off-hook telephone or headset. The system alerts a CALLMASTER 
terminal with a single ring cycle whenever either the headset or the handset 
is plugged into the headset jack.
Interactions
nPersonalized Ringing
The called party hears the user-selected ringing pattern for the distinctive 
ring cycles.
DS1 Trunk Service
Digital Signal Level 1 (DS1) trunk service uses bit-oriented signaling (BOS) and 
multiplexes 24 channels (T1 service) or 32 channels (E1 service) into a single data 
stream. DS1 can be used for voice or voice-grade data and for data-transmission  
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1318 DS1 Trunk Service 
20
protocols. T1 trunk service multiplexes 24 channels into a single 1.544-Mbps data 
stream. E1 trunk service multiplexes 32 channels into a single 2.048-Mbps stream. 
Both T1 and E1 provide a digital interface for trunk groups. 
For information about how to administer DS1 with enhanced administration, refer 
to ‘‘
Signaling modes’’ on page 1320.
Brief description
DS1 trunk service provides a digital interface for the following trunks.
nVoice-grade DS1 tie trunks
nAlternate voice/data (AVD) DS1 tie trunks
nRobbed-bit AVD (RBAVD) DS1 tie trunks 
nDigital Multiplexed Interface (DMI) tie trunks
nISDN-PRI trunks 
nCentral Office (CO) trunks 
nForeign Exchange (FX) trunks
nRemote-access trunks
nWide Area Telecommunications Service (WATS) trunks
nDirect Inward Dialing (DID) trunks
nMain/Satellite tie trunks
nTie trunks that link Common-Control Switching Arrangement (CCSA) or 
Enhanced Private Switched Communications Service (EPSCS) networks
nRelease-link trunks for Centralized Attendant Service (CAS)
nAccess trunks
nOff-premises stations (also known as station-side DS1)
nAccess endpoints
DS1 also provides the following functions in public and private networks:
nElectronic tandem networks (ETN) or tandem tie-trunk networks (TTTN)
nDirect access to local exchange carriers 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1319 DS1 Trunk Service 
20
 DS1 operational and signaling parameters
The table below provides the recommended combination of parameters for each 
DS1 interface.
DS1 
Circuit 
Packs # Trunk 
MembersBit Rate 
Mbps CompandingSignaling 
Mode Trunk Type
1
TN722 1-23 1.544 mulaw common-chan Tie, 
DMI-BOS, 
CO
2
1-24 robbed-bit Tie
TN722B 1-23 1.544 mulaw common-chan Tie, 
DMI-BOS, 
CO
2
1-24 robbed-bit CO/DID/Tie
TN767D, 
E
31-23 1.544 mulaw common-chan Tie, 
DMI-BOS, 
C0
2
1-24 robbed-bit CO/DID/Tie
1-23 (24th 
is D-chan)isdn-pri
4ISDN
1-24 isdn-ext
4ISDN
TN464B
51-30 2.048 alaw/mulaw6CAS CO/DID/Tie
1-31 alaw isdn-pri
4ISDN
1-31 isdn-ext
4ISDN
1-23 1.544 mulaw common-chan Tie, 
DMI-BOS, 
CO
2
Continued on next page 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1320 DS1 Trunk Service 
20
Signaling modes
Common-channel signaling (CCS) is an industry-standard technique where any 
one of a group of channels carries the signals for the other channels. Lucent 
Technologies uses the 24th channel of a group for signaling. This signaling 
technique differs from 24-channel signaling. When the system is configured for 
Facility-Associated Signaling, 24-channel signaling uses the 24th channel in a 
DS1 facility to carry signals. This technique also is called clear channel, 
out-of-band, or alternate voice data (AVD) signaling. TN464C, 
D, E, F
3, 
and 
TN24641-24
1-23 (24th 
is D-chan)
1-31 (16th 
is D-chan)
1-24
1-31
1-301.544
4
2.048
1.544
4
2.048
2.048alaw/mulaw
alaw/mulaw
alaw/mulawrobbed-bit
isdn-pri
4
isdn-ext4
CASCO/DID/Tie
ISDN
ISDN
ISDN
CO/DID/Tie
TN2242 1-30
1-30
7
2.048
2.048alaw/mulaw
alaw/mulawCAS
isdn-priTie
ISDN
1. CO is any of the following trunk types: CO, FX, WATS.
Tie is any of the following trunk types: access, tie, tandem, RLT, APLT.
2. Common-channel DS1 circuit packs used in CO trunk groups must have a trunk type of auto.
3. Integrated CSU functionality is available only with the TN767D and TN464E or later-suffix DS1
circuit packs. Enhanced ICSU functionality is available only with TN767E, TN464F, and
later-suffix DS1 circuit packs.
4. Mixed-mode signaling is allowed. This means that if the signaling mode is isdn-ext or isdn-pri, a
port from that circuit pack may be used in any trunk group that allows robbed-bit signaling.
5.The TN464B’s companding is based upon the system companding that you administer.
6. ISDN-PRI calls are not guaranteed to work for the TN464B if the system’s companding is set to
mu-law.
7. The administered D-channel on the DS1 screen for ISDN-PRI cannot be a trunk group member.DS1 
Circuit 
Packs # Trunk 
MembersBit Rate 
Mbps CompandingSignaling 
Mode Trunk Type
1
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							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1321 DS1 Trunk Service 
20
Channel Associated Signaling (CAS) is similar to common-channel signaling and 
is used only when the Bit Rate is 2.048 Mbps (the trunk is used with an E1 
interface). Signaling is carried on the 16th channel.
Common-channel signaling and channel associated signaling provide a maximum 
transmission rate of 64 Kbps for bearer channels.
Robbed-bit signaling is a per-channel signaling technique for transmitting 
signaling bits on each channel in a DS1 facility. The least-significant bit in every 
6th transmitted information frame is removed and replaced by a signaling bit. This 
technique is also called in-band signaling. The maximum transmission rate for 
each bearer channel with robbed-bit signaling is 56 Kbps.
ISDN-PRI signaling is carried on the 24th channel for a 1.544 Mbps connection 
and on the 16th channel for a 2.048 Mbps connection.
Public network signaling administration for ISDN-PRI Layer 3
The table below shows DEFINITY ECS public network access connections for 
ISDN-PRI Layer 3.
Admin 
value Country Protocol supportedB-channel 
mtce msg
1 - a United States, 
CanadaAT&T TR 41449/ 41459 (tested with AT&T 
network, Canadian network, and MCI 
network)Service
1 - b United States  Bellcore TR 1268;
NIUF.302; ANSI T1.607Restart
1 - c United States NORTEL DMS-250 BCS36/IEC01 Service
2a Australia AUSTEL TS014.1;
Telecom Australia TPH 1856 National ISDN 
protocolRestart
2b Australia ETSI ISDN protocol Restart
3 Japan NTT INS-NET Restart
4 Italy ETS 300 102 Restart
5 Netherlands ETS 300 102 Restart
6 Singapore ETS 300 102 Restart
7 Mexico ETS 300 102 Restart
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							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1322 DS1 Trunk Service 
20
8 Belgium ETS 300 102 Restart
9 Saudi Arabia ETS 300 102 Restart
10 - a United 
KingdomETS 300 102 (for connection to DASS 
II/DPNSS through external converter)Restart
10 - b United 
Kingdom, 
IrelandETS 300 102 (Mercury); British Telecom 
ISDN 30; Telecom Eireann SWD 109none
11 Spain Telefonica ISDN Specification Restart
12 - a France  VN4 (French National PRI) None
12 - b France  ETS 300 102 modified according to P10-20, 
called EuronumerisNone
13 - a Germany FTZ 1 TR 6 (German National PRI) None
13 - b Germany ETS 300 102 Restart
14 Czech 
Republic, 
SlovakiaETS 300 102 Restart
15 Russia (CIS) ETS 300 102 Restart
16 Argentina ETS 300 102 Restart
17 Greece ETS 300 102 Restart
18 China ETS 300 102 Restart
19 Hong Kong ETS 300 102 Restart
20 Thailand ETS 300 102 Restart
21 Macedonia ETS 300 102 Restart
22 Poland ETS 300 102 Restart
23 Brazil ETS 300 102 Restart
24 Nordic ETS 300 102 Restart
25 South Africa ETS 300 102 Restart
ETSI - a Europe, New 
Zealand, etc.ETS 300 102 Restart
ETSI - b ETS 300 102 None
Admin 
value Country Protocol supportedB-channel 
mtce msg
Continued on next page 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1323 Emergency Access to the Attendant 
20
Emergency Access to the Attendant
Emergency Access to the Attendant alerts an attendant if a telephone remains 
off-hook for more than the administered period of time. It also enables a user to 
place an emergency call to an attendant.
Detailed description
Emergency calls can be placed automatically by the system or dialed by system 
users. Such calls can receive priority handling by the attendant.
Place emergency calls to the attendant in the following ways:
nAutomatically by the system
Assign a telephone the Off-Hook Alert option via class of service (COS). If 
the terminal is left off-hook until intercept timeout, the (administrable) 
off-hook alerting timer starts. If the terminal is still off-hook when the 
timer expires, an emergency call is automatically placed to the attendant.
nDial access by a system user
A user can place an emergency call to the attendant by dialing the 
Emergency Access to the Attendant feature-access code.
When an emergency call is placed, one of the available attendants receives visual 
and audible notification of the call. If all attendants are busy, the call enters a 
queue for emergency calls. Calls can be administered to redirect to another 
extension if the queue is full.
An emergency call causes the following to occur:
1. The system selects the first available attendant to receive the call.
2. The attendant hears the emergency tone and sees the lamp associated with 
the Emergency button, if assigned, light. If the console does not have 
emergency-tone capability, the attendant hears normal ringing and sees the 
display flash.
3. The attendant display shows:
— Calling-party identification
— Calling-party extension 
— How many emergency calls remain in queue
An audit record is created for each emergency call. This record includes:
nExtension where the call originated
nThe attendant or attendant group that answered the call 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1324 Emergency Access to the Attendant 
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nTime of the call 
nThe following known call results:
— Call Completed — Call answered at attendant or listed directory 
number (LDN) night extension.
— Queue Full — Emergency-access queue is full; tries to redirect the 
call to an emergency-access redirection extension.
— No Attd — No active attendants are available to receive the call; 
tries to redirect the call to an emergency-access redirection 
extension.
— Redirected Answered — Call is answered by the emergency-access 
redirection extension.
— No Redirection Ext. — Could not redirect the call to the 
emergency-access redirection extension because none are 
administered.
— Attd Night Service — System is in night service. Will try to redirect 
the call to attendant night service.
— Failed — Caller drops the call before it can be answered. Call was 
either waiting in the attendant emergency queue, ringing at an 
attendant console, or ringing at the LDN night extension.
— Redirected Abandoned — Caller drops the call before it can be 
answered. Call had been redirected to the emergency-access 
redirection extension.
You can generate an Emergency Access Summary Report of the emergency audit 
records. Schedule the report for printing once a day at a designated printer. If the 
switch has a journal printer Emergency Access to the Attendant audit records print 
as the calls occur.
You can monitor emergency-access calls by displaying them at the administration 
terminal. The command for listing emergency call events is 
list emergency. You 
can use a from and to time option with the command. For example, if you enter 
the command 
list emergency 8:00am 12:00pm, the report shows emergency call 
events that occurred during that interval.
Considerations
nThe emergency tone cannot be silenced except by answering the emergency 
call.
nThe system should have at least one day and one night attendant (or night 
service station) for this feature to be useful at all times. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1325 Emergency Access to the Attendant 
20
Interactions
nCentralized Attendant Service
For a branch with CAS in effect, an emergency call reroutes to the branch 
attendant group. If the branch does not have an attendant or if the branch is 
not in CAS Backup Service, the call is denied.
If the branch PBX is in CAS Backup Service, an emergency call routes to 
the backup position and is handled as any other non-emergency call.
nCOR 
An emergency call to the Attendant overrides all restrictions on the COR.
nIndividual Attendant Access
An emergency call cannot be placed to an individual attendant.
Emergency calls have priority over other calls to an individual attendant, 
only if they are assigned a higher priority on the Console Parameters form.
nInter-PBX Attendant Service
For branches with Inter-PBX Attendant Service in effect, an emergency 
call reroutes to the local attendant group. If the branch does not have an 
attendant or if the attendant is not on duty, the call is denied.
nNight Service
When Night Service is in effect, emergency calls route to the night 
destination. Such calls are included on the Emergency Audit Record, and 
the call is designated as Emergency Night in the audit trail.
When an attendant is in night service, you must assign either a night station 
or a redirect extension. Otherwise emergency calls to the night attendant 
hear a busy tone.
nOff-Hook Alerting automatically places an emergency call to the attendant.
nPriority Queue
You can change the priority of emergency calls to equal or lower than that 
of other types of calls.
nRemote Access
An emergency call cannot be placed through Remote Access.
nRestriction — Controlled
An emergency call overrides any controlled restriction. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Features and technical reference 
1326 Emergency Transfer 
20
Related screens 
nClass of Service (Off-Hook Alert)
nConsole Parameters
— Queue Priorities 
nFeature-Related System Parameters
— Reserved Slots for Attendant Priority Queue
— Time before Off-Hook Alert
— Emergency Access Redirection Extension
nHospitality 
— Extension of Journal/Schedule Printer
— Time of Scheduled Emergency Access Summary Report
nAttendant Console - Feature Button Assignments
— em-acc-att
nFeature Access Code (FAC)
— Emergency Access To Attendant Access Code
Emergency Transfer
Emergency Transfer provides service to and from the local telephone company 
central office (CO) during a power failure or when service is impaired. Emergency 
Transfer is also called Power Failure Transfer; the terms are synonymous.
Detailed description
Emergency Transfer allows analog telephones (500- or 2500-type) to access the 
local CO and to answer incoming calls during a power failure.
Each DEFINITY ECS cabinet supports Emergency Transfer panels via the AUX 
connectors on the rear panel. The transfer is initiated when:
na transfer panel or associated cabinet loses power.
nsomeone manually activates the Emergency Transfer switch on the 
associated maintenance circuit pack
nthe software determines that service for that cabinet is severely impaired
You cannot activate any other system features during a complete system power 
failure.