ATT DEFINITY Communications System Generic 3 Instructions Manual

							Night Service — Trunk Grou p
Issue  3   March 1996
3-937
Night Service — Trunk Group
Feature Availability
This feature is available with all Generic 3 releases.
Description
The Trunk Group Night Service feature allows an attendant or a designated voice 
terminal user to individually assign a trunk group or all trunk groups to the night 
service mode. Specific trunk groups (individually) assigned to Trunk Group Night 
Service are in the In dividual Trunk Night Service Mode. In this mode, incoming 
calls made on a sp ecific trunk group are redirected to its designated Night 
Service Extension  (NSE). Incoming calls on the trunk groups not assigned to 
Trunk Group Night Service are be processed normally.  The specific trunk 
groups can be assigned to Trunk Group Night Service by pressing the individual 
Trunk Night Service b utton(s) on the attendant console or a voice terminal.
All trunk groups can be assigned to the night service mode at the same time.  In 
this arrangement, the trunk groups are in the System Night Service mode. Any 
incoming calls made on the trunk groups are redirected to their designated NSE. 
All trunk groups can be assigned to System Night Service by pressing the 
System Night Service button on the principal attendant console or a  designated 
voice terminal.
Considerations
The Trunk Group Night Service feature gives a d de d flexibility to attendants and 
designated voice terminal users who are responsible for activating or 
deactivating all, or individual, trunk groups at various times.
All incoming calls on individual or system Night Service trunk groups goes to the 
trunk group’s NSE unless the trunk group member has its own Trunk Group 
Member Night Destination, in which case the calls are redirected to that night 
destination instead of the trunk g roup’s NSE.
Calls already in progress on a trunk group, such as talking, on hold, or  waiting in 
queue on a trunk group, are not affected when the individual Trunk Group Night 
Service or System Night Service feature is activated b y the attendant or a voice 
terminal user.
Trunk Group Night Service and System Night Service b oth work independently of 
each other.  Activation or d eactivation of one of these night service features d oes 
not affect the other.  Specific situations are described below:
nWhen System Night Service is d eactivated, trunks with individual Trunk 
Group Night Service still activated remain in night service. 
						

							Feature Descriptions
3-938Issue  3   March 1996 
nWhen System Night Service is activated, trunks controlled by individual 
Trunk Group Night Service buttons remain in day service.
nTrunks with individual Trunk Group Night Service can be taken out of Night 
Service even though the rest of the system remains in Night Service.
nTrunks with individual Trunk Group Night Service can be put into Night 
Service even though the rest of the system remains in day service.
nTrunk groups assigned to individual Trunk Group Night Service are not 
reassigned to System Night Service when the System Night Service 
feature is activated. Those trunk groups that are not currently assigned to 
Trunk Group Night Service are assigned to System Night Service.
If a trunk is added to a trunk g roup while that trunk group is in Trunk Group Night 
Service, the trunk is brought up in night service.
Individual Trunk Group Night Service does not apply to  DID trunk groups.
If Night Service is activated for a trunk group, and a power failure o c curs, the 
trunk group automatically returns to the Night Service mode.
If for some reason, a voice terminal with a trunk-ns button remains out-of-service 
after a system reboot and later comes back in service, the trunk-ns lamp shows 
the trunk status within 10 seconds of coming back in service. For example, a 
voice terminal with a trunk-ns button may be unplugg e d when the system is 
rebooted.  If the voice terminal is later plu g ged back in, the trunk status is shown 
on the trunk-ns b utton within 10 seconds.
Interactions
The following features interact with the Night Service — Trunk Group feature.
nLDN 
In the System Night Service mode, all incoming  LDN calls, except those 
using DID trunks, which have activated night service are redirected to 
their corresp onding trunk group’s NSE. Incoming LDN calls using DID 
trunks are directed to the Night Console Service, Night Station Service, or 
Trunk Answer From Any Station feature, respectively, whichever applies 
first. Non-LDN DID trunk calls terminate at the dialed extension.
nCall Forwarding — All Calls
If the Trunk Group Night Service mode and the trunk group’s NSE has Call 
Forwarding — All Calls a ctivated, the night service c alls terminating to that 
NSE are forwarded to its designated extension.
nForced First Announcements
An intera ction occurs with system night service and Forced First 
Annoucement. For example, if hunt group A has a forced first 
announcement (delay =0), assign the incoming CO trunk to terminate at  
						

							Night Service — Trunk Grou p
Issue  3   March 1996
3-939
hunt group A. Assign the incoming trunk’s night service destination to be 
another hunt group (hunt group B). Assign a night service button to the 
attend ant. 
With night service activated on the attendant, the incoming CO call routes 
to the night service destination hunt group B and d oes not play the Forced 
First Announcement of the incoming destination’s hunt group A.
Without night service active, the incoming CO call routes to the incoming 
d estination hunt group A and plays the Forced First Announcement.
Administration
Individual Trunk Group Night Service is a dministered on a voice terminal b asis or 
attendant console. The following items require administration:
nAssign ‘‘trunk-ns’’ button(s) to d esignated voice terminal(s). Up to three 
buttons c an be assigned to voice terminals in each trunk group. The trunk 
group number must be assigned for each button.
If a ‘‘trunk-ns’’ button is assigned for an existing trunk, it is update d 
immediately to show the status of the trunk.
nAssign ‘‘trunk-ns’’ button(s) to attendant console(s). Three buttons per 
attendant console are allowed. The trunk group number must be assigned 
for each button.
nPermission to allow attendant seeking calls other than DID LDP  calls 
redirect to the DID Listed Directory Number (LDN) night extension, if 
desired.
The system can have extension numb ers for Night Service per trunk group 
member that take precedence over the one assigned to the group. The system 
can have Trunk Group Night Service and split Night Service at the same time, but 
the calls are redirected to the trunk group’s NSE before it goes to the hunt 
group/split’s NSE.
Hardware and Software Requirements
No a d ditional hardware or software is required. 
						

							Feature Descriptions
3-940Issue  3   March 1996 
Off-Premises Station
Feature Availability
This feature is available with all Generic 3 releases.
Description
Allows a voice terminal located outside the building where the switch is located 
to be connected to the system.    If CO trunks are used, the voice terminal must 
be analog and must b e FCC-registered (or, outside the US, registered by the 
appropriate governmental agency).
Considerations
Off-Premises Stations are useful whenever it is necessary to have a voice 
terminal located away from the main location.
The maximum loop distance for Off-Premises Stations is 20,000 feet (6093.34 
meters) without repeaters.
Interactions
The Distinctive Ringing feature might function improperly at an Off-Premises 
Station due to the distance. However, the Distinctive Ringing  feature  can  be 
disabled when the Off-Premises Station is a dministered. If the Distinctive Ringing 
feature is not used with an Off-Premises Station, the terminal will receive 
one-burst ringing for all calls.
Administration
Off-Premises Stations are administered by the System Manager.
Off-Premises Stations are a dministered the same as on-premises voice terminals 
with the following exceptions:
nFor voice terminals used as Off-Premises Stations the “ Off-Premises 
Station” field must be a dministered as yes.
nFor voice terminals used as Off-Premises Stations the “ R Balance 
Network”  field must  be completed. 
						

							Off-Premises Station
Issue  3   March 1996
3-941
Hardware and Software Requirements
Requires cross-connecting capabilities or one port on a TN747 or TN464B/C/D 
DS1 Tie Trunk circuit pack  for each interface to be provided.
NOTE:
TN767 supports Mu-Law, TN464B supports A-Law, and TN464C/D 
supports both Mu-Law and A-Law.
No a d ditional software is required 
						

							Feature Descriptions
3-942Issue  3   March 1996 
3
PC Interface
Feature Availability
This feature is available with all Generic 3 releases.
Description
The PC (Personal Com puter) Interface feature consists of the PC/PBX 
Connection, the PC/PBX Platforms, and PC/ISDN Platform product family. These 
products are used with the and DEFINITY  Sy stem  Generic 3 switches to provide 
users of AT&T PCs and other IBM comp atible PCs fully integrated voice and data 
work station capabilities. PC/PBX Connection is a voice and data call 
management application.
NOTE:
See the AT&T Catalog or your account team for other applications available 
on the platforms.
The platforms consist of PC interface cards and open voice and data 
Applications Programming Interfaces (API). These APIs allow a variety of 
applications to operate on the PC and communicate with the switch.
Configurations
Several different configurations are available for the PC Interface feature. For 
convenience in referencing, these break d own into three groups. Groups 1 and 2 
use the DCP (Digital Communications Protocol) while Group 3 uses the ISDN-BRI 
(Basic Rate Interface) protocol.
Configuration Group 1
Group 1, consists of those DCP PC/PBX configurations that use a PC Cartridge in 
a 7404D voice terminal (manufacture discontinued) to communicate with the 
switch. This group was formerly called p ackage 1 (now Release 3.0X) and 
package 2. Group 1 is shown in Figure 3-26. (Please note that this configuration 
is not available for new installations.) 
						

							PC Interface
Issue  3   March 1996
3-943
Figure 3-26. DCP PC Interface Configuration (Group 1)
1 Other IBM-c omp atible PCs can be used, as well as the PC 6300.2 UNIX PCs were originally introduced but are no longer supported by the PC Interfa ce feature.
Configuration Group 2
Group 2, consists of those DCP PC/PBX Connection configurations that use the 
PC/PBX Interface Card (formerly DCP exp ansion card) in the PC itself to provide 
the communications interface with the switch.  Group 2 uses the DCP protocol 
and is described in detail in 
 PC/PBX Connection Release 3, 555-016-715, and 
PC/PBX Platform Installation and Reference, 555-016-101.  Group 2 was formerly 
called packages 3, 4, 5, and 6 and now are c ombined as Release 3.0X.  Group 2 
is shown in  Figure 3-27.
DEFINITY
Generic 3
PC³  UNIXÒ PC6300²
7404D with
PC Cartridge7404D with
PC Cartridge
EIA
RS232DCPHost
Package 2Package 1 
						

							Feature Descriptions
3-944Issue  3   March 1996 
Figure 3-27. DCP PC Interface Configuration (Group 2)
1 Other IBM-c omp atible PCs can be used, as well as the PC 6300. PCs that use the MicroChannel. 
b us (IBM Personal System/2 TM Models 50, 55, 60, 70, 80, or 100 percent compatible) can 
use the PC/PBX MicroChannel Platform Interface card.
2 UNIX PCs were originally introduced but are no longer supported b y the PC Interfa ce feature.
Configuration Group 3
Group 3 consists of those configurations that use the ISDN-BRI (Basic Rate 
Interface) for communications.  Connectivity to the switch is provided by the 
PC/ISDN Interface Card installed in the PC itself. Possible arrangements in this 
group include the PC as a stand alone terminal (PC only), or with from one to four 
voice terminals,  handsets, or headsets.  Group 3 is available on the DEFINITY 
switch Generic 3, b ut not on previous System 85 switches.  Group 3, d escribed 
in detail in the 
PC/ISDN Platform  Installation  and  Reference manual, 
555-016-102, is shown in Figure 3-28.
Applications and Benefits
PC Interface users receive benefits provided by both the PC and the features 
and services of the DEFINITY  Generic 3 switch.
DEFINITY
Generic 3
Packages  4 and 6UNIX PC²
With DCP Interface
CardDCP
DCP
Packages 3 and 5PC6300*
With DCP Interface
Card
DCP
Voice
Terminal
DCP
Voice
TerminalHost 
						

							PC Interface
Issue  3   March 1996
3-945
Figure 3-28. ISDN—BRI PC Interface Configuration (Group 3)
Switch Features and Services
PC Interface users have multiple appearances (d epending on the software 
application used) for their assigned extension.  One or more of these 
appearances can be designated for use with data calls.  With the ISDN-BRI 
version, up to four separate PC/ISDN Interface Cards can be used on the same 
PC.  Each interface card used can be assigned a separate extension numb er, 
and each of these extension numbers can have multiple appearances. The 
availability of specific features depends on the class of service of the assigned 
extension and the system class of service for the switch. Modem Pooling should 
be provided to ensure general availability of off-net data calling services.
PC Features and Services
nPC/PBX Connection
Provides an integrated voice and data workstation interface from the 
System to an AT&T PC 6300 or other comp atible computer. The 
connection provides access to a variety of host computers, allowing the 
PC to act as a terminal for the host.
To administer a PC/PBX connection, the PC/PBX connection must be 
completed.
DEFINITY
Generic 3
TN556
Handset
or
Headset PC With Application2B + D
Switch FeaturesDMI Interworking
ISDN
Voice
Terminal
Voice
Terminal
BRI StationsPRI Trunks
BRI
Interface
CardBRI
Interface
CardBRI
Interface
CardBRI
Interface
Card
ISDN 
						

							Feature Descriptions
3-946Issue  3   March 1996 
nDirectory Service
nLast Numb er Dialed 
Features and services provided by the PC are a function of the PC 
software application in place.  With the PC/PBX Connection software, they 
include PC based Directory Services (on line), a Last Number Dialed 
feature (separate from these features as provided by the switch), and 
basic asynchronous terminal emulation.
n3270 Emulation
nHayes Smart Modem Emulation
nE78 Plus/ISDN
Other options include such functions as synchronous 3270 Emulation and 
Hayes Smart Modem Emulation.  The E78 Plus./ISDN (no longer available) 
software package provides enhanced software based 3270 emulation 
with high s peed (64 Kbps) connections (through a 3270 d ata module) to a 
local or remote 3270 cluster controller.  This includes bulk file transfer 
capability over switched links including either ETN (Electronic Tandem 
Network) or ISDN circ uits.  Exp ensive fixed coaxial connections can be 
avoided.  The user interface with the E78 Plus/ ISDN software is the same 
as with the widely used E78/IRMA
TM (no longer available) hardware 
configurations.
Refer to the AT&T document 
PC/PBX Platform Installation and Reference 
555-016-101 (for Group 2) and to 
PC/ISDN Platform Installation and 
Referenc e
 555-016-102 (for Group 3) for details on PC software options 
and features, and applications.  Also see the AT&T Catalog or your 
account representative for more information on available applications.
For additional PC/PBX user information, refer to 
AT&T PC/PBX Connection 
Package 3 User’s Guide,
 555-016-703. A comp lete set of documents is 
available as 
AT&T PC/PBX Connection Release 3 Documentation Set, 
555-016-715.
The PC/PBX Platforms and  PC/ISDN Platform offers local custom 
applications programming capability.  A separately orderable publication, 
the 
PC/ISDN Interface Software Developer’s Guide, 555-016-103, 
provides the information that you need to customize existing applications 
software or to develop new applications software to meet local needs.
Feature History and Development
The DCP versions of this feature (Groups 1 and 2) were first supported in 
System 85 R2 V4, as the PC/PBX Connection feature.  For System 85 R2 
V4 and later switches, PCs have their own terminal typ e (PC).  On earlier 
versions of the Release 2 System 85 switch, PC/PBX c onfiguration Groups