ATT DEFINITY Communications System Generic 3 Instructions Manual

							Information System Network (ISN) Interface
Issue  3   March 1996
3-787
nConnected Indication — This o ption should be disabled, and can only be 
set if Keyboard Dialing is enabled.
nCOR — Outgoing lines should be origination restricted. Incoming lines 
should be termination restricted.
Hardware and Software Requirements
One TN726 Data Line circ uit pack is required for each eight ISN interfaces. No 
a d ditional software is required. 
						

							Feature Descriptions
3-788Issue  3   March 1996 
Integrated Directory
Feature Availability
Integrated Directory is available with all Generic 3 releases.
Description
Allows internal system users with display-equipped terminals to access the 
system database, use the touch-tone buttons to key in a name, and retrieve an 
extension number from the system  directory. The d irectory contains an 
alphanumeric listing of the names and extension numbers assigned to all voice 
terminals administered in the system.
The Inte grated Directory feature can be accessed by display-equip ped voice 
terminal users or Attendants with an assigned Integrated Directory button.
The names in the directory are those administered by the System Manager on 
the “Ind ividual Voice Terminal” forms. Names cannot exceed 15 characters 
(including spaces and c ommas) and can be entered in one of the following three 
formats.
nLast name, comma, first name, space, then mid dle name or initial, if 
desired. For example, the following entries are acceptable:
— Jones,Betty Ann
— Smith,A E
— Thomas,John J
— Ab b ott,Lynn
nFirst name, space, second name or initial, and then last name. For 
example, the following entries are acceptable:
— Betty Ann Jones
— A E Smith
— John J Thomas
— Lynn Abbott
nA single entry is also acceptable:
— Cafeteria
— 1J409
— 2F816
— Purchasin g
The following is an example of a typical Integrated Directory database: 
						

							Integrated Directory
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— 1J409
— Ab b ott,Lynn A
— Brown,Kent J
— Cafeteria
— Carr,Danny
— Carter,Ann
— 2F816
— Purchasin g
— Barbara Quincey
— Roberson,Don T
— William Ruoff
— Smith,A E
— Streck,R T
The touch-tone buttons are used to key in the numb ers and letters labeled on 
them. The  following exc eptions a p ply:
n7 (PRS) is also used for a Q.
n9 (WXY) is also used for a Z.
n* is used for a space or comma.
n# is not used.
To activate the Integrated Directory feature, the user presses the Integrated 
Directory button. This puts the voice terminal in the Inte grated Directory mode 
and turns off the tones normally generated when a touch-tone button is pressed. 
The touch-tone buttons are now used exclusively for keying in names and not for 
dialing.
After the Integrated Directory button is p ressed, the alphanumeric d isplay shows 
DIR ECTOR Y — PLE AS E ENTE R NA ME . Nam e s are always keyed in the following 
order: last name, comma, and then first name or initial. When searching for a 
single entry, the letters or numb ers are keyed in order. Several letters might be 
needed to get the correct entry.
When a button is pressed, the display shows the first name that matches the first 
letter on the button. For example, if a user is searching for the name Ann Carter 
and p resses 2 to key in the letter C, the disp lay might show Abbott,Lynn A and an 
extension number. (2 matches A before it matches C.) If the user presses 2 again 
to key in the letter A, the display stays the same. (Again, AB is matched before 
CA.) If the user now p resses 7 to key in an R, the d isplay might show Carr,Danny 
and an extension number. 
						

							Feature Descriptions
3-790Issue  3   March 1996 
At this p oint, the user can press 8 to key in the letter T or can press the Next 
Message button on the alphanumeric display. Pressing Next Message displays 
the next name in the directory and, in this case, might be Ann Carter.
When the desired name and extension number are displayed, the user can 
automatically place a call to that person by pressing the Call Display button.
If a name is entered but not found in the directory, the  display shows NO MATCH 
— TRY AGAIN. You can then enter another name. To search for another name, 
the user presses the Integrated Directory b utton again, and the feature is 
reactivated.
To exit the Integrated Directory mode, the user presses one of the other mo de 
buttons assigned to the alphanumeric display module; for example, the Normal 
mode button.
Considerations
With Integrated Directory, users spend less time looking up names and extension 
numbers. Instead of searching through lists or directories, a user simply keys in 
the desired name and the display shows the name and extension numb er. Less 
dialing time is also required if a Call Display b utton is p rovid e d. When the desired 
extension is displayed, the user just presses the Call Display button to 
automatically place the call.
A maximum numb er of users can activate Integrated Directory at the same time. 
If more than this maximum number of users try to activate the feature at the same 
time, the Integrated Directory button lights and the display shows Directory 
unavailable — Try Later.
The entire directory cannot be searched by pressing 2. Pressing 2 and then 
continually pressing Next Message displays, one by one, all entries b e ginning 
with A, B, C, and 2. If all entries have been displayed and Next Message is 
pressed again, the display repeats from the first entry in the listing associated 
with 2.
When the voice terminal is in the Integrated Directory mode, it cannot be used to 
make calls or access features by dial code. It can, however, still b e used to 
activate other features or to place calls if dialing is not required. Also, a user can 
enter the Integrated Directory mode while active on a call, and calls can be 
received when the Integrated Directory mode is active.
The set of characters allowed in the Integrated Directory database are the 
alphanumeric characters (A-Za-z) and digits (0-9) as well as s pace ( ) and 
comma (,) which are used as delimiters. In ad d ition, the following special 
characters are allowed: hyphen (-), apostrophe (‘), period (.), slash (/), an d 
ampersand (&.) These special characters, though considered legal characters, 
are not entered into the Integrated Directory. Instead, a period (.) is replaced by a 
space ( ). Apostrophe (‘), hyphen (-), slash (/), and ampersand (&) are ignored. 
						

							Integrated Directory
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For G3r, if a name of a station or data module begins or ends with a comma (,) or 
contains more than one comma (,,), the directory search for that name fails.
If a character outside the allowed set is entered as the name of a station or data 
module, the directory search for that name fails.
NOTE:
The “/” and “?” characters are p unctuation marks and should not be used 
to re present information. The “ +” or “%”  characters may be used to 
re present information.
Interactions
The following features interact with the Integrated Directory feature.
nAttendant Display and Voice Terminal Display
If prefixed extensions are used in the system’s dial p lan, the prefix is not 
displayed when the extension is displayed. The Call Display button c an be 
used to dial prefixed extensions b ecause the system d ials the prefix, even 
though it is not displayed.
nMerlin®/System 25 Voice Terminal Support — 731xH Series Support
The Merlin/System 25 7309H, 7313H, 7314H, 7315H, 7316H, and 7317H 
voice terminals do not support Integrated Directory displays.
nTouch-Tone Dialin g
Call origination and feature access by dial c o de is not allowed when the 
Integrated Directory feature is active.
Administration
Integrated Directory is administered on a per-voice terminal basis by the System 
Manager.  The following items require administration:
nDisplay Module
nDirectory Button
nCall Display Button
nMessaging Cartridge (for 7404D)
nNext b utton
Hardware and Software Requirements
No a d ditional hardware or software is required. 
						

							Feature Descriptions
3-792Issue  3   March 1996 
Integrated Services Digital Network
(ISDN) — Basic Rate Interface (BRI)
Feature Availability
This feature is available with all Generic 3 releases.
Description
Allows connection of the system to equipment or endpoints that support an 
Integrated Services  Digital  Network (ISDN) by using a standard ISDN frame 
format called the Basic Rate Interface (BRI).
An ISDN provides end-to-end d igital connectivity and uses a high-speed 
interface which provides service-independent access to switched services. 
Through internationally accepted standard interfaces, an ISDN provides circuit 
or packet-switched connectivity within a network and can link to other ISDN 
supported interfaces to provide national and international digital connectivity. 
Two types of ISDN interfaces are currently defined: the PRI and the BRI. This 
description focuses on ISDN-BRI.
The ISDN-BRI is a 192 k b ps interface that carries two 64 k b ps B-channels and 
one 16-kbps D-channel. Each B-channel supports voice and data, while the 
D-channel transports data, signaling, and other bits for framing.
NOTE:
nAlthough ISDN-BRI can support data transmission on the D-channel, 
DEFI NI TY s yst em  Generic 3 does not support this c a pability. DEFINITY  
system Generic 3 only provides signaling on the D-channel.
nISDN-BRI is only available on DEFINITY switches that support 5-law 
companding. See the 
DEFI NI TY Com munications System Generic 3 
System Description and Specifications
, 555-230-206, for further details.
nThe word ‘‘endpoint’’ is used whenever statements a pply to BRI voice 
terminals, BRI data mo dules, and integrated BRI voice/data terminals.
The DEFI NI TY switch supports the following across the ISDN-BRI interface to an 
endpoint:
— A single voice call
— A single data call
— A voice call and a data call simultaneously
— Two simultaneous data calls 
						

							Integrated Services  Digital  Network (ISDN) — Basic 
Rate Interface (BRI)
Issue  3   March 1996
3-793
ISDN-BRI Endpoint Configurations
There are two p ossible configurations with ISDN-BRI:
nPoint-to-point — Only one en d point connected to a BRI port
nMultipoint — Multiple endpoints connected to a BRI port. This 
configuration is also referred to as ‘‘passive b us configuration.’’
Because the DEFINITY system BRI provides non-blocking voice and data 
services, a maximum of two endpoints are supported on one BRI port in a 
multipoint configuration.
The DEFI NI TY switch dynamically allocates the two B-channels on a BRI 
interface to handle voice and data requests. Because there are two B-channels, 
only two simultaneous service requests can be granted at any time on a BRI port 
to provide non-blocking service (either through point-to-point or multipoint 
configurations).
When one endpoint is capable of providing two service requests (such as an 
integrated voice/data endpoint or an endpoint that supports two simultaneous 
%B-c hannel data calls), the endp oint must b e configured as point-to-point 
because both B-channels can potentially be used simultaneously by the two 
services. You can have the following endpoint types in the point-to-point 
configuration:
nOne voice-only en d point
nOne stand-alone data endpoint
nOne integrated voice/data endpoint
NOTE:
Even though an integrated voice/data endpoint supports two service 
requests (that is, both voice and data), the integrated endpoint is not 
considered to be in multipoint configuration because it is only one 
endpoint.
If two endpoints are each capable of providing only one service request, then 
they can b e administered on the same BRI port. Doing so provides a multipoint 
configuration. In this case, both B-channels can potentially be used 
simultaneously by two service requests and, since each BRI port provides two 
B-c hannels, no additional endpoints can be administered on this BRI port. You 
can have the following endpoint types in the multipoint configuration:
nTwo voice-only endpoints
nTwo stand-alone data endpoints
nOne voice-only en d point and one stand-alone data endpoint
NOTE:
An en d point that supports two simultaneous B-channel d ata calls is not 
supported in a multi point configuration. 
						

							Feature Descriptions
3-794Issue  3   March 1996 
Terminal Equipment Identifier (TEI)
The terminal equipment identifier (TEI) is used to set up communication between 
the switch and an endpoint. The DEFI NIT Y syst em supports two types of TEIs: 
fixed and automatic. A fixed TEI endpoint supports one fixed TEI value (0 to 63), 
which is encoded into the terminal equipment, and the fixed TEI initialization 
procedure. When  administering a fixed TEI endpoint, you must assign the 
endpoint’s fixe d TEI value to the “Station”  or “Data Module” forms for that 
endpoint. If the en d point’s fixed TEI value d iffers from the TEI assigned to the 
“Station”  or “Data Mod ule”  forms for that endpoint, no communication is 
established between the switch and the endpoint. As a result, the endpoint is 
incapable of providing services. Normally, the manufacturer specifies the fixed 
TEI value encoded into the terminal or provides procedures for modifying the 
fixed  TEI value.
An automatic TEI endpoint supports automatic TEI initialization procedures and 
receives a TEI from the system during initialization. With automatic TEI endpoints, 
you are not entering any TEI values to the “Station”  or “ Data Mod ule”  forms. Only 
the automatic TEI endpoints are permitted to be used in multipoint 
configurations. Currently, all supported BRI en d points are automatic  TEI 
endpoints.
Service Profile Identifier (SPID)
When more than one endpoint is connected to a BRI port (for example, a 
multipoint configuration), the switch uses the Service Profile Identifier (SPID) to 
associate endpoints with the administered station or data module extensions. 
The SPID enables the switch to differentiate b etween the endpoints connected to 
the same BRI port.
You must administer the SPID on the “Station”  or “Data Mod ule”  forms, and then 
program the SPID in the BRI endpoint using the procedure in the endpoint’s 
users’ manual. During initialization, the en d point sends the SPID to the switch. 
The SPID administered on the “Station” or “Data Module Ad ministration”  forms 
must match the SPID which is programmed into the endpoint. If the SPID on the 
“Station”  or “Data Mod ule Ad ministration”  forms does not match the SPID 
programmed into the endpoint, the system restricts service to that endpoint.
SPID a dministration and programming are required for a multipoint configuration. 
However, SPID administration is o ptional in a point-to-p oint configuration 
because there is only one en d point connected to the BRI port. If the SPID is 
administered in a point-to-point configuration, it must match the SPID 
programmed into the endpoint. If the SPID is not administered, the switch uses 
the port to associate the endpoint to the administered station or data mo dule 
extension.
NOTE:
The BRI version of the PC Interface feature, the PC/ISDN Platform, is a 
non-initializing terminal and does not require a SPID.  In fact, in the 
stand-alone configuration, this typ e of terminal cannot be assigned a SPID. 
						

							Integrated Services  Digital  Network (ISDN) — Basic 
Rate Interface (BRI)
Issue  3   March 1996
3-795
ISDN-BRI Voice/Data Terminal Equipment
Voice transmission on ISDN-BRI is provided by the 7505, 7506, 7507, 8503T, 
8510, and 8520 voice terminals. All tests and services available to DCP users are 
also available to BRI users.
Data transmission on ISDN-BRI is provided by the 7500 Data Module (or a 
compatible stand-alone d ata module) and the Asynchronous Data Module 
(ADM). The 7500 Data Module is a stand-alone unit that supports asynchronous 
or synchronous DCE and asynchronous DTE:
nIn asynchronous mode, the 7500 supports packet- or circuit-switched 
data communications, and can be controlled via the front panel or the 
keyboard of a connected terminal.
nIn synchronous mode, the 7500 supports circ uit-switched or nailed-up 
data communications, requires either the Multi-purpose Enhancement 
Board or the High-Speed Synchronous Enhancement Board, and can only 
be controlled via the front panel.
The ADM may be used with asynchronous DTE as a data stand for 7500-series 
BRI voice terminals. Consisting of a b oard located inside the BRI voice terminal, 
the ADM allows the transmission of integrated voice and data through one voice 
terminal. (Separate extension numbers are used for the voice and data calls.) 
The ADM supports the Hayes command set for comp atibility with PC 
communications p a ckages.
The PC/ISDN Platform provides both voice and data transmission and  is part of 
the AT&T PC Interface  package, Group 3. (Please see the PC Interface feature.) 
The PC/ISDN Platform can be used in a stand-alone (no associated voice 
terminal) configuration.   When used this way or with a handset or headset, rather 
than one of the 7500 series voice terminals, the PC/ISDN Platform is a 
non-initializing terminal that  does not support MIMs (Management Information 
Messages).  This means that these ‘‘stations’’ do not go through an initialization 
procedure with the switch. It also means that they d o not require a SPID, and that 
they do not initiate or respond to MIMs. Even when used with a 7500 series voice 
terminal, the endpoint (combined PC and phone) should still be administered as 
a non-initializing terminal that does not supp ort MIMs.
NOTE:
When more than one PC/ISDN interface card is used on the same PC, each 
separate card provides a separate interface and is translated on the switch 
with its own ELL (Equipment Line Location) as a separate station.
Endpoint Initialization
To be fully operative, BRI endpoints must successfully comp lete endpoint 
initialization procedures. These procedures are usually done at installation time 
or as part of reconfiguration. 
						

							Feature Descriptions
3-796Issue  3   March 1996 
Multipoint Configurations on BRI Ports
In a p assive bus multipoint c onfiguration, the system supports two BRI endpoints 
per port, thus doubling the capacity of the BRI circuit pack. When changing the 
configuration of a BRI from point-to-p oint to multipoint, the original en d point need 
not be reinitialized. However, only endpoints that support SPID initialization can 
be administered in a multipoint configuration.
Exchange of User Information
The BRI protocol provides the users with the capability of exchanging up to 128 
octets of user information end-to-end. The information is passed in the
User-to-User Information IEs to the receiving endpoint without b eing interpreted 
by the switch. However, there are some limitations to the exchange of User 
Information IEs.
ISDN-BRI Data Service
Basic Digit Dialing
Regular digit dialing is provid e d through the ADM. Digits from 0 to 9, ‘‘*’’ and ‘‘#’’ 
can be entered. This feature can be used by the user either from the set keypad 
or from the EIA terminal interface.
Default Dialing
Default Dialing is also an enhancement to the user dialing capabilities of the Data 
Call Setup feature. By either typ ing a d  followed by   or pressing the data 
button twice, if a default a d dress is administered, the switch terminates the call to 
the default a ddress. If no default dialing has been administered, the call is 
disconnected in less than one second. This feature and the Data Hotline feature 
are mutually exclusive.
Data Hotline
Data Hotline is a security feature that allows a user to enter a Dial command, 
with no address sp ecified, followed by a  . The switch terminates the call 
to a preadministered hotline d estination. If a user enters an address, either 
intentionally or unintentionally, the call processing discards the address string 
received for the hotline end p oint. The call processing automatically routes the 
call just as if the hotline destination address had been entered by the user. This 
service does not imp ose any restriction on incoming calls received at the 
endpoint.
NOTE:
This feature and the Default Dialing feature are mutually exclusive.
RETURN
RETURN