ATT DEFINITY Communications System Generic 3 Instructions Manual

							Distinctive Ringing
Issue  3   March 1996
3-667
Distinctive Ringing
Feature Availability
Distinctive Ringing is available with all Generic 3 releases. This feature is called 
‘‘Ringing Distinctive’’ in G2.
Description
Helps voice terminal users and attendants distinguish between various types of 
incoming calls.
The ringing cycle, which begins when a voice terminal or attendant console 
receives an incoming call, is heard b y the voice terminal user or attendant. There 
are three basic call types - external, internal, and p riority. There are three types of 
distinctive ringing cycles (1-, 2-, and 3-b urst); and with G3iV1, and 
G3vsV1/G3sV1 the association between basic call types and ring cyc le types is 
FIXED (1-b urst = internal, 2-burst = external, 3-burst = priority).  With G3i-g lobal, 
G3rV1, G3V2, and  later releases, this association between basic call types and 
ring cycle types is administrable with the d efault b eing the same as G1.  In 
a d dition to these basic call ringing patterns, there are ringing signals for 
(Automatic and Dial) Interc om calls, Manual Signaling, and Redirection 
Notification. There are a dministrable distinctive alerting patterns that can be 
administered for internal, external, and priority calls. These are system-wide 
patterns which are administered on the “ System Parameters Features”  form.
The associated call types, types of users, and ringing cycles are as follows:
NOTE:
Table 3-53 shows the default values used in the Unite d States. For further 
details, see the World Class Tone Generation section later in this chapter 
						

							Feature Descriptions
3-668Issue  3   March 1996 
.
Table 3-53. Distinctive Ringing Defaults in United States
If the Default 
Ringing Cycle Is: Then the Call Type Is: User
One-burst ringing 
(1.2 on, 4.0 off 
repetitive)Internal voice terminal, internal 
tie trunk, and Remote A c cessAll voice terminals
Intercom Single-line voice terminals
Two-burst ringing 
(0.2 on, 0.4 off; 0.6 
on, 4.0 off repetitive)Attendant-extended, 
attendant-originated, and 
incoming trunk, including 
external tie trunkAll voice terminals
Three-burst ringing 
(0.2 on, 0.1 off; 0.2 
on, 0.1 off; 0.6 on, 
4.0 off repetitive)Automatic Callback, Priority 
Calling, and Ringback 
Queuing callbac kSingle-line voice terminals
Three-burst ringing 
(0.1 on, 0.1 off; 0.1 
on, 0.3 off; 0.6 on, 
4.0 off repetitive)Multi-appearance voice 
terminals
Single tone (0.6 on, 
4.6 off repetitive)Intercom Multi-appearance voice 
terminals
Single tone (0.2 on) Manual Signaling Multi-appearance voice 
terminals
Single tone (0.2 on) Redirection Notification All voice terminals 
						

							Distinctive Ringing
Issue  3   March 1996
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Table 3-54 lists the call types and their ringing cycles received at attendant 
consoles.
Table 3-55 lists the call types and their ringing cycles received at attendant 
consoles.
Considerations
Distinctive Ringing allows the user to i dentify the type of incoming call. By 
knowing the type of incoming call, the user is able to answer each call in a 
suitable manner for that typ e of call.
The two- and three-burst ringing is optional only on single-line voice terminals. If 
Distinctive Ringing is disabled, the user hears a one-burst repetitive tone for all 
incoming calls. This is useful for equipment interfaced by analog lines, especially 
if the Off-Premises Station feature is used. Table 3-54. Distinctive Ringing Defaults in United States 
Received at Attendant Consoles
If the Default Ringing Cycle Is: Then the Call Type Is:
Low-pitched tone (0.4 on, 1.2 off 
repetitive)Incoming call
High-pitched tone (0.4 on, 1.2 off 
repetitive)Attendant Recall call and when any 
call associated with a timed reminder 
interval returns to the console
Low-pitched tone (0.25 on, 0.8 off 
repetitive)Calls waiting in queue
Table 3-55. Call Types and Ringing Cycles Received at 
Attendant Consoles
Call Type Default Ringing Cycle (In Seconds)
Incoming call Low-pitched tone (0.4 on, 1.2 off 
repetitive)
Attendant Recall call and when any 
call associated with a timed 
reminder interval returns to the 
consoleHigh-pitched tone (0.4 on, 1.2 off 
repetitive)
Calls waiting in queueLow-pitched tone (0.25 on, 0.8 off 
repetitive) 
						

							Feature Descriptions
3-670Issue  3   March 1996 
A single distinctive ring cycle is used for each new incoming call when a voice 
terminal is off-hook or a headset is being used. The CALLMASTER. terminal is 
alerted with a single ring cycle whenever either the headset or handset is 
plugged into the headset jack.
Interactions
The Distinctive Ringing  cycles are altered when the Personalized Ringing feature 
is use d.
Administration
Ringing is a standard system feature. No a dministration is required exc ept for the 
following items which are set by the System Manager:
nFor G3i-Global, G3rV1, G3V2and later releases, the various ringing cycles 
and what they are for.
NOTE:
Typically, the one-, two-, and three-burst distinctive ringing patterns 
are administered for internal, external, and priority calls, 
respectively.
nRedirection Notification can be assigned for any voice terminal.
nDistinctive two- or three-burst ringing can be disabled for single-line voice 
terminals. 
						

							DS1 Trunk Service
Issue  3   March 1996
3-671
DS1 Trunk Service
Feature Availability
This feature is available with all Generic 3 releases.
Description
Provides a digital interface for the following:
nVoice-Grade DS1 Tie Trunks
nAVD DS1 Tie Trunks
nRobbed-Bit Alternate Voice/Data (RBAVD) DS1 Tie Trunks 
nDMI Tie Trunks
nISDN-PRI Trunks
nCO Trunks
nFX Trunks
nRemote Access Trunks
nWATS Trunks
nDID Trunks
nOff-Premises Stations
nAccess Endpoints (G3i)
Voice Grade DS1 Tie Trunks
The Voice-Grade DS1 tie trunks are an alternative to four-wire analog E&M  tie 
trunks and may be used to interface with other properly equipped switching 
systems.
Voice-Grade DS1 tie trunks can also be used as the following:
nETN or TTTN ti e trunks
nMain/Satellite tie trunks
nTie trunks used to interface with EPSCS and CCSA networks
nRelease link trunks for CAS
nAccess Trunks.
The TN722B, TN767, or TN464C/D DS1 circuit pack is used to support 
Voice-Grade DS1 tie trunks in the Rob b ed Bit Signaling mode. The  Robbed  Bit 
Signaling mode supports 24 trunks for transmission on the circuit pack because  
						

							Feature Descriptions
3-672Issue  3   March 1996 
the least significant b it (robbed) in every sixth frame of data transmission is 
replaced by a signaling bit.
This typ e of tie trunk uses DS1 transmission facilities in the USA and Canada DS1 
format, which is a 1.544 Mbps digital signal that consists of a 1.536 Mb ps signal 
multiplexed with an 8 kbps framing signal.
NOTE:
The TN767 and the TN464C and later revisions of the DS1 circ uit packs 
provide a DSX1 interface.
AVD Tie Trunks
AVD DS1 tie trunks permit alternate voice and data calling  between a Generic 3 
and another switch. The other switch can be a System 75 R1V2 or later,
System 85 R2V1 or later, a DEFINITY  system Generic 1, Generic 2, or Generic 3.
AVD DS1 tie trunks can be used to connect the system with other digital 
switches.
The TN722B, TN767, and TN464 DS1 circuit pack (TN464 supports A-law) is 
used to support AVD DS1 tie trunks in the Common Channel Signaling mode. 
The Common Channel Signaling mode supports 23 trunks for d ata transmission 
and 1 trunk for signaling purposes. (32 channel signalling mode is supported 
with the TN464B/C/D  boards.)
This typ e of tie trunk uses DS1 transmission facilities in the USA and Canada DS1 
format, which is a 1.544 Mbps digital signal that consists of a 1.536 Mb ps signal 
multiplexed with an 8 kbps framing signal.
Tie Trunks
Rob bed-Bit Alternate Voice/Data DS1 tie trunks permit alternate voice and data 
calling between Generic 3 and another switch. The other switch can be a 
DEFI NI TY s yst em  Generic 1, Generic 2, or Generic 3.
Rob bed-Bit Alternate Voice/Data DS1 tie trunks can be used to connect the 
system with other digital switches.
Rob bed-Bit Alternate Voice/Data DS1 tie trunks can be used to dynamically 
access voice/data SDN Services.
For normal AVD facilities, modem pool resources are not automatically inserted. 
With Ro bb e d-Bit Alternate Voice/Data facilities, a data origination access code 
can be used to force modem pool insertion on the call.
The TN722B, TN767, or TN464 DS1 circuit pack is used to support Robbed-Bit 
Alternate Voice/Data DS1 tie trunks in the Ro bb e d-Bit Signaling mode. 
						

							DS1 Trunk Service
Issue  3   March 1996
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This typ e of tie trunk uses DS1 transmission facilities in the USA and Canada DS1 
format, which is a 1.544 Mbps digital signal that consists of a 1.536 Mb ps signal 
multiplexed with an 8 kbps framing signal.
DMI Tie Trunks
DMI tie trunks use Bit-Oriented Signaling or ISDN-PRI Message-Oriented 
Signaling to interface with a host computer, another PBX, or a p u blic or private 
network.
The TN722B DS1 Tie Trunk circuit pack supports Voice-Grade DS1, AVD DS1, 
and DMI tie trunks in the Bit-Oriented Signaling modes. In addition, the TN767 
and TN464 DS1 circuit packs supports DMI tie trunks in the ISDN-PRI signaling 
mode. For  details on the  DMI signaling modes, see the Digital Multiplexed 
Interface feature description, elsewhere in this section.
This typ e of tie trunk uses DS1 transmission facilities in the USA and Canada DS1 
format, which is a 1.544 Mbps digital signal that consists of a 1.536 Mb ps signal 
multiplexed with an 8 kbps framing signal.
When the DS1 circuit pack is assigned ISDN-PRI signaling, Robbed Bit Signaling 
and ISDN-PRI signaling can be used over the same DS1 interface. Trunk groups 
administered with a c ommunication typ e of ‘‘voice’’ can use Robbed Bit signaling 
and trunk groups administered with a communication type of ‘‘isdn’’ can use the 
ISDN-PRI signaling.
CO, FX, and WATS Trunks
When the TN767 or TN464 DS1 circuit pack interface is used to provide CO, FX, 
or WATS trunk g roup service with incoming and outgoing types of g round start or 
loop start, Ro bb e d Bit Signaling must be used.
When the DS1 interface is used to provide CO, FX, or WATS trunk g roup service 
with incoming/outgoing dial types administered as auto/auto, auto/delay, 
auto-immediate, or auto/wink, either Common Channel Signaling or Ro bb e d Bit 
Signaling can be used.
When the DS1 interface is used to provide CO, FX, or WATS trunk g roup service 
with incoming and outgoing types of ground start or loop start, outgoing trunk 
calls do not receive answer supervision. Instead, the answer supervision is faked 
by the DS1 circuit pack based on a timer administered on the “Trunk Group” 
form.
Remote Access Trunks
Signaling for remote access trunks is depends on the trunk group and 
incoming/outgoing dial types. 
						

							Feature Descriptions
3-674Issue  3   March 1996 
DID Trunks
When the DS1 interface is used to provide DID trunk group service, Robbed Bit 
Signaling must be used.
Off-Premises Stations
DS1 off-premises stations d o not receive system message waiting indications.
When the DS1 interface is used to provide off-premises stations, Robb ed Bit 
Signaling must be used.
Access Endpoints
Individual channels of a DS1 can be assigned extensions with the Ac cess 
Endpoint function.  Access Endpoints are discussed in the Administered 
Connections feature description elsewhere in this manual.
Considerations
DS1 tie trunks offer voice and data transmission, via DS1 d igital facilities, at lower 
cost and faster speed than conventional analog trunks. Data transmission costs 
are lower than if large analog trunk groups are used. In the future, di gital 
transmission is expected to cost less, thus adding to savings over analog 
facilities.
Interactions
The following features interact with the DS1 Trunk Service feature.
nCAS 
AVD tie trunks and RLTs can share the same DS1 interface. RLTs cannot, 
however, be administered or a communication type of avd  on the RLT 
Trunk screen.
nDCS 
AVD DS1 tie trunks can only be used in a DCS between two DEFINITY 
system Generic 1s or between a DEFINITY system Generic 1 or Generic 3 
and System 75, System 85, or DEFI NI TY s yst em  Generic 2.1.
nETN 
AVD DS1 tie trunks c an only b e used in an ETN between two Generic 1s or 
between Generic 1 or Generic 3 and System 75, br System 85, or 
DEFI NI TY s yst em  Generic 2.1. 
						

							DS1 Trunk Service
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nModem Poolin g
When AVD DS1 tie trunks are used, a conversion resource is not 
automatically inserted into the connection because the system cannot 
determine whether the transmission is voice or data. A conversion 
resource is connected between Voice-Grade tie trunks and digital 
endpoints.
nPrivate Network Access
AVD DS1 tie trunks cannot be used as EPSCS or CCSA access trunks.
Administration
DS1 trunks are assigned on a per-line basis by the System Manager. The 
following items require administration:
nDS1 Circuit Pack — Assign the circuit pack to the system b efore 
administration of the associated trunks.
nSynchronization Plan — Ad minister to provide synchronization between 
the switch’s DS1 circ uitry and the digital facilities that the switch is 
connected to.
nTrunk Groups — Associate the trunks to groups, if desired.
Hardware and Software Requirements
One TN722, TN767, or TN464 DS1 circuit pack is required for every 24 trunks 
using Robbed  Bit Signaling  or  for every 23 trunks using Common Channel 
Signaling. If ISDN-PRI signaling is used, a TN765 Processor Interface circuit 
pack is required for G3vs/G3s and G3i (or for G3i the TN778 Packet Control) in 
a d dition to the DS1 circuit pack. G3r requires the TN1655 packet interface 
(PKTINT) circ uit pack.
A TN464 circuit pack is required to support 32 trunks.
No a d ditional software is required. 
						

							Feature Descriptions
3-676Issue  3   March 1996 
Do Not Disturb
Feature Availability
This feature is available with all Generic 3 releases.
Description
Allows guests, attendants, and authorized front desk voice terminal users to 
request that no calls, other than priority calls, terminate at a particular extension 
number until a specified time.  At the specified time, the system automatically 
deactivates the feature and allows calls to terminate normally at the extension.
Do Not Disturb is a form of Termination Restriction that is associated with an 
automatic deactivate time.  When Do Not Disturb is active at an extension 
number, the user will receive only those calls associated with the Automatic 
Callback, Automatic Wakeup, and Priority Calling features, and those calls that 
are redirected to that extension via the Call Coverage and Call Forwarding All 
Calls features.  All other call attempts will redirect to a recorded announcement, 
an attendant, or intercept tone, as specified by the System Manager through 
administration.
This feature may be dial or button accessed from voice terminals equipp e d with 
touch-tone dialing or button accessed from attendant consoles and front desk 
terminals. Users with rotary-dial terminals must call the attendant or front desk 
user to request Do Not Disturb.
When the Do Not Disturb feature is activated, the system supplies voice 
prompting to voice terminal users or display prompting to attendants and front 
desk users.
Feature Activation by Voice Terminal Users
A voice terminal user can activate Do Not Disturb by dial access or by button 
access if a Do Not Disturb b utton is assigned to the voice terminal. If dial access 
is used, the system automatically deactivates the feature at the requested time.  
If button access is used, deactivation is not automatic .
nDial Access
When a user dials the Do Not Disturb feature access code, the system 
generates voice messages (through the use of a Speech Synthesis  circuit 
pack) that direct the user to enter a deactivate time.  The DTMF buttons on 
the voice terminal are used to enter this information.  The user may later 
change or delete the request b y dialing the Do Not Disturb FAC a gain and 
entering the required information.