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 -...

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...

Distinctive Ringing
Issue  3   March 1996
3-669
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...

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...

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...

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...

DS1 Trunk Service
Issue  3   March 1996
3-673
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,...

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...

DS1 Trunk Service
Issue  3   March 1996
3-675
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...

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...