ATT DEFINITY Communications System Generic 3 Instructions Manual

							Data Call Setu p
Issue  3   March 1996
3-577
CHECK OPTIONS Placing a call Notifies calling terminal that data module 
options are incompatible.
XX  I N Q UEUECall in q ueue Current position of the user in queue.
XX-indicates position.
PROCESSING* Call in q ueue Notifies user when out of queue. Facility is 
available.
TIMEOUT*Call in q ueue Notifies user when time has been 
exceeded. Call will b e terminated.
FORWARDED* Receiving a call Equivalent to redirection notification signal. 
Called terminal has activated Call 
Forwarding and received a call, and call 
has been forwarded.
INCOMING CALL-* Receiving a call Equivalent to ringing.
INVALID ADDRESS Placing a callThe entered name is not in the 
Alphanumeric Dialing Table.
PLEASE ANS- Receiving a call Originating voice terminal user has 
transferred call to data module using 
One-Button Transfer to Data.
-TRANSFER Call is transferred to 
voiceNotifies calling terminal when Data Call 
Return-to-Voice occurs.
CONFIRMED Activating or 
deactivating a 
featureEquivalent to confirmation tone. Feature 
request is accepted, or call has gone to a 
local coverage point.
-OTHER ENDDuring a call Notifies user that the other end
terminated the call.
DISCONNECTED* Call is terminated Call or call attemp t is disconnected from 
system
WAIT Placing a call Notifies user that normal processing is 
continuing.
WA IT,  X X IN  
QUEUEPlacing a call Notifies user that call entered a local hunt 
group queue. XX indicates position.
* Bell sounds when message is displayed. Table 3-50. Call Progress Messages for Keyboard Dialing for 
DCP — Continued  
Displayed Message Application Meaning
Continued on next page 
						

							Feature Descriptions
3-578Issue  3   March 1996 
Data Call Setup for ISDN-BRI Modules
Voice Terminal Dialing for ISDN-BRI 
Data Modules
Allows ISDN-BRI voice terminal users to directly originate a d ata call. To set up a 
data call, the user just presses the Data button on the ISDN-BRI voice terminal, 
enters the desired number on the dial pad, and then presses the Data button 
again.
The following data functions are not supported by BRI  terminals:
nOne b utton transfer to data
nReturn-to-voice
nData call pre-indication
nVoice call transfer to data and data call transfer to voic e
Data Terminal (Keyboard) Dialing for ISDN-BRI Data Modules
Allows a user to set up and disc onnect data calls directly from a data terminal 
without using a voice terminal. The voice terminal functions of switchhook and the 
audible call progress tones are replaced with keyboard dialing and text known 
as c all progress messages. Unlike DCP, BRI is terminal d ependent, meaning that 
the BRI data module, not the switch, promp ts the user to enter information.
NOTE:
The 7500B Data Module also allows users to set up calls via its front panel. 
For more information on this feature, consult the 
7500B Data Module User’s 
Manual
, 555-021-717.
Before the user can make a data call using Data Terminal Dialing, CMD: must 
a p pear on the screen of the terminal. To a ccess the CMD: prompt b efore placing 
a call, the user must p ress Enter on the keyboard a few times. If the CMD: prompt 
does not appear, the user must press Break A and T at the same time, and then 
press Enter. To make a data call, the user types dial, enters a space, types the 
desired telephone number, and presses Enter at the CMD: prompt (For examp le, 
dial 1234567).
To disconnect a data call using Data Terminal Dialing, the user must first enter 
+++ to access the CMD: prompt. At the CMD: prompt, the user typ es end and 
presses ENTER.
In a ddition to the numeral, #, and * characters found on a touch-tone pad, the 
dialing information may contain the following special characters:
nSPACE,—, (, and) may be used to improve legibility. These characters are 
ignored by the system during dialing.
n+ character (wait) may be used to interrupt or suspend dialing until dial 
tone is received from the distant switch. 
						

							Data Call Setu p
Issue  3   March 1996
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n, (pause) character may b e used to place a 1.5-second pause in dialing.  
(multiple, can be used).
n% (mark) character may be used to indicate the following digits are for 
end-to-end signaling (touch-tone). This is required when the trunk is 
rotary. It is not required when the trunk is ‘‘touch-tone.’’ 
nUNDERLINE or BACKSPACE characters may be used to correct 
previously typ ed characters on the same line.
n@ may be used to delete the entire line and start over with a new
CMD: prompt.
Each line of dialing information may contain up to 42 characters (the +  and % 
characters count as two each).
Examp les of dialing are as follows:
nCMD: d 3478
nCMD: d 9+(201) 555-1212
nCMD: d 8, 555-2368
nCMD: d 9+555-2368+%9999+123 (remote access)
Basic Digit Dialing
Regular digit dialing is provided through the Asynchronous Data  Module (ADM) 
or 7500B Data Module. Digits from 0 to 9, ‘‘*’’, and ‘‘#’’ can be entered. This 
feature can be used by the user either from the associated 7500 Series voice 
terminal keypad or from the EIA terminal interface.
Alphanumeric Dialing
Alphanumeric Dialing enhances Data Terminal Dialing by allowing a data 
terminal user  to p lace a data call by entering an alphanumeric name. This 
capability makes Data Terminal Dialing both convenient and user-friendly. 
Instead of dialing a long string of numbers, the user can enter a simple 
alphanumeric name. For more detailed information, consult the Alphanumeric 
Dialin g feature description elsewhere in this chapter.
Default Dialing
Default Dialing enhances Data Terminal (Keyboard) Dialing by allowing a data 
terminal user to place a data call to a preadministered destination by  either 
typing a d and entering Return at the CMD: prompt, or by pressing the data 
button twice. If no default dialing has been a dministered, the call will be 
disconnected in less than one second. The data terminal user c an still place calls 
to other destinations by typing a d and the complete address at the CMD: 
prompt, and then entering Return (normal Data Terminal Dialing or Alphanumeric 
Dialing). This feature is mutually exclusive with the Data Hotline feature. For more 
detailed information, see the Default Dialing feature d escription elsewhere in 
this chapter. 
						

							Feature Descriptions
3-580Issue  3   March 1996 
Call Forwarding All Calls
Call Forwarding All Calls allows incoming data calls to be redirected to another 
extension that is designated by the user. Activation/deactivation of the feature is 
done either by the attendant or by the forward ing party itself through the dialing 
of a feature access code.
Data Hotline
Data Hotline is a security feature. The switch will terminate the call to a 
preadministered hotline d estination. If a user enters an a ddress either 
intentionally or unintentionally, the call processing will discard the address string 
received for the hotline endpoint. The call processing will automatically route 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. This feature is mutually exclusive with the Default Dialing feature.
Administered Connections
An Administered Connection is an end-to-end connection between two access 
endpoints or d ata endpoints that is automatically established by the system 
whenever the system is restarted or the Administered Connection is a dministered 
and due to be active. The attributes of these connections are user-defined. To 
administer Administered Connections, use the “ Administered Connection” form 
via the SAT.
Once the ADM has been a dministered as one endpoint of an administered 
connection, the system waits for the scheduled time to set u p the connection. At 
the scheduled time, the system establishes the connection and maintains it for 
the length of time specified. Once the call is accepted, the set will enter into the 
continuous mo de for the length of time specified. If the switch is reboote d during 
the continuous connection, the connection will reinitiate the call setup. At any 
time that the connection drops (for example, disconnected cabling), the switch 
will reinitiate the call setup.
Call Request
DEFI NI TY s yst em  Generic 3 call p rocessing will handle all various BRI Bearer 
data call requests that are presently defined. Some capabilities that are not 
supported by AT&T terminals may be provided by a non-AT&T terminal. The 
switch will complete most call requests. For those capabilities that the switch 
does not support, a proper cause value will return back to the terminal.
Cause Value
BRI stations will receive a cause or reason code that identifies why the call is 
being cleared. The BRI data modules will convert certain cause values to text 
messages  and display them for the user. 
						

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Endpoint Initialization
BRI en d points have to successfully complete end p oint initialization procedures 
in order to be fully operative. It is usually  carried out at the time of installation, or 
as part of reconfiguration.
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 reinitialize d.  However, only endpoints that support SPID initialization can 
be administered in a multipoint configuration.
Exchange of User Information
The BRI protocol provides the users the  cap a bility of exchanging up to 128 
octets of user information end-to-end. Disp layed messages are shown in  Table 
3-51. The information  is passed in  the User Information IEs to the receiving 
endpoint without being interpreted by the switch. However, there are some 
limitations to the exchange of User  Information IEs.
Table 3-51. Call Progress Messages for Keyboard Dialing for 
BRI
Displayed Message Application Meaning
CMD: Placing a call Equivalent to dial tone. Enter the desired 
number or feature access code followed 
by a carriage return or a line feed.
RINGING Placing a call Equivalent to ringing tone. Called terminal 
(far-end) is ringing.
BUSY Placing a call Equivalent to b usy tone. Called number is 
in use or out of service.
ANSWERED Placing or 
receiving a callNotifies calling and called users that call 
has been answered.
TRY AGAIN Placing a call Equivalent to reorder tone. System facilities 
are currently not available.
DENIED Placing a call Equivalent to interc ept tone. Call c annot be 
placed as dialed.
ABANDONED Receiving a call Notifies called user that the calling user 
abandoned the call.
NO TONE Placing a call Notifies user that tone was not detected.
Continued on next page 
						

							Feature Descriptions
3-582Issue  3   March 1996 
CHECK OPTIONS Placing a call Notifies calling terminal that data module 
options are incompatible.
XX  I N Q UEUECall in q ueue Current position of the user in queue.
XX-indicates position.
PROCESSING* Call in q ueue Notifies user when out of queue.
Facility is available.
TIMEOUT*Call in q ueue Notifies user when time has been 
exceeded. Call will b e terminated.
FORWARDED* Receiving a call Equivalent to redirection notification signal. 
Called terminal has activated Call 
Forwarding and received a call, and call 
has been forwarded.
INCOMING CALL-* Receiving a call Equivalent to ringing.
WRONG ADDRESS Placing a callThe entered name is not in the 
Alphanumeric Dialing Table.
PLEASE ANS- Receiving a call Originating voice terminal user has 
transferred call to data module using 
One-Button Transfer to Data.
CONFIRMED Activating or 
deactivating a 
featureEquivalent to confirmation tone. Feature 
request is accepted, or call has gone to a 
local coverage point.
-OTHER ENDDuring a call Notifies user that the other end terminated 
the call.
DISCONNECTED* Call is terminated Call or call attemp t is disconnected from 
system.
WAIT Placing a call Notifies user that normal processing is 
continuing.
* Bell sounds when message is displayed. Table 3-51. Call Progress Messages for Keyboard Dialing for 
BRI — Continued  
Displayed Message Application Meaning
Continued on next page 
						

							Data Call Setu p
Issue  3   March 1996
3-583
Considerations
All systems have Data Call Setup c a pability. This facilitates data calling by 
eliminating the need to dedicate a voice terminal for d ata calls. DEFINITY system 
Generic 3 offers the enhancement of off-premises Multiple Line Dialing.
BRI has a voice to data restriction. A voice terminal cannot call a data terminal, 
and a data terminal cannot call a voice terminal.
BRI voice terminals cannot have Data Extension buttons. Although DCP sets 
have Data Extension buttons, these sets cannot have Data Extension buttons for 
BRI data extensions.
When a voice terminal user places a data call to a digital data endpoint, and 
does not transfer the call to another digital d ata endpoint but uses a modem or 
acoustically coupled modem, the user must dial the Data Origination access 
code assigned in the system b efore dialing the distant endpoint.
Data Call Preindication is activated by pressing a Data Extension button b efore 
dialing the distant  data endpoint. Preindication is in effect until the associated 
Data Extension  button  is pressed again for a one-button transfer; there is no 
time-out.
The numb er of assigned Data Extension b uttons per voice terminal is not limited. 
However, only one voice terminal can be assigned buttons that access the same 
data module.
When placing outgoing or off-premises calls via keyboard dialing, the call 
progress message WAIT indicates recognition of the nature of the call and 
acceptance of the call. The ANSWERED text indicates completion of outp ulsing 
over the selected trunk, or if answer supervision or an answer tone is received.
Interactions
The following features interact with the Data Call Setup feature.
nAbbreviated Dialing
This feature can be used by voice terminal or Data Terminal (Keyboard) 
Dialing users on calls to data endpoints. Only 22 of the 24 available digits 
in an abbreviated dialing numb er can be used for keyboard dialing. The 
remaining two digits must contain the ‘‘wait’’ indicator for tone detection.
nCall Coverage
A hunt group ma de up of digital data end p oints should not be assigned a 
coverage path. 
						

							Feature Descriptions
3-584Issue  3   March 1996 
nCall Forwarding All Calls
Calls incoming to a data module can be forwarded. That is, calls can be 
redirected to another en d point. This feature is activated using Data 
Terminal (Keyboard) Dialing. If the forwarded-to endpoint is an analog 
data endpoint, and the calling user is a d igital endpoint, modem pooling is 
activated automatically.
nData Call Hot Line
Upon going off-hook for origination, the system automatically places a call 
to a predesignated local or off-premises destination.
nDefault Dialing
Default Dialing enhances Data Terminal (Keyboard) Dialing by allowing a 
data terminal user to place a data call to a preadministered destination.
nInternal Automatic Answer (IAA)
Data calls are not eligible for IAA.
nModem Poolin g
When modem p ools are provided, this feature is automatically available on 
data calls when the system ascertains the need for a conversion resource. 
The system automatically inserts the conversion resource.  Data Call 
Preindication or Data Origination can also be used to indicate that a 
conversion resource is needed.
nCDR 
Data Call CDR records the use of modem pools on trunk calls.
nUCD 
UCD can provide a group of data modules or analog modems for 
answering calls to facilities, such as computer ports, connected to the 
data modules or mo dems.
nISN Interface
ISN consists of p acket data switches which support data calls between 
data endpoints and the system. The physical connection to the system is 
via the DLC board . The DLC provides eight ports for connection with 
asynchronous EIA RS-232C compatible Data Terminal Equipment to the 
ISN interface.
Data Terminal (Keyboard) Dialing is used to access ISN endpoints.
nWorld Class Tone Detection
Multiple-Line Data Terminal Dialing is only supported if the administered 
Level of Tone Detection is ‘‘precise.’’ G3i-Global and G3V2 and later 
releases provide administration of tone detection options.  The  message 
the data call setu p feature sends to users vary according to which tone 
detection o ption is selected.   
						

							Data Call Setu p
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If the tone detection option is not set to ‘‘precise,’’ and a d ata c all is set up 
over an analog trunk, the data call setup messages desc ribing the status 
of the called endpoint (that is, RINGING, BUSY, TRY AGAIN, etc .), 
changes according to which tone d etection option is selected.
Tone Detection a p plies to non-ISDN trunk lines as well.
Administration
Data Call Setup does not require assignment as such; however, the following 
related items require administration by the System Manager:
nData Origination Ac cess Code — Allow users to indicate a need for a 
conversion resource on an analog to digital data call origination.
nPort Assignments — Assign the data modules, BCTs, DLCs, 7404D, 
analog modems.
nModem Pooling  — Assign Circuit Packs or ports.
nData Extension buttons — Assign Data Extension buttons to 
multi-appearance voice terminals.
nDefault Dialing — See the Default Dialing  feature.
nAlphanumeric Dialing — See the Alphanumeric Dialing feature.
Hardware and Software Requirements
Data Call Setup is a means of using data equipment to esta blish data calls. 
Requirements for data modules, voice terminals, and modems are as follows:
nData Mo dules: Each DCP data module requires one port on a TN754 
Digital Line circuit pack (TN413, TN754B support A-law). A DTDM shares 
the port with its associated voice terminal.
Each BRI d ata module requires one port on a TN556 BRI circuit port pack. 
Each BRI p ort may be shared by two endpoints, with each endpoint 
providing either voice or data capability. To support ISDN-BRI, the switch 
requires the TN778 Packet Control circuit pack. An ADM shares the port 
with its associated BRI voice terminal.
n7400A Data Mo dule: The 7400A Data Module may be used instead of an 
MTDM when supporting the combined Modem Pooling feature. The 7400A 
Data Mo dule supports asynchronous operation and provides a DCP 
interface to the switch and a RS-232c interface to the associated modem. 
The 7400A can operate in the stand-alone mode as a data module.
n7500B Data Mo dule: The 7500B Data Module is a stand-alone unit that 
supports asynchronous  or synchronous DCE and asynchronous DTE on 
the Basic Rate ISDN (BRI) switch interface. In asynchronous mode, the 
7500B supports packet or circuit-switched data communications, and c an 
be controlled via the front panel or the keyboard of a connected terminal. 
The following optional enhancements are available for the 7500B in an  
						

							Feature Descriptions
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asynchronous DCE c onfiguration:  an RS-366 ACU interface and a second 
asynchronous EIA-232D interface. In synchronous mode, the 7500B 
supports circuit-switched or nailed-up data communications, requires 
either the Multi-purpose Enhancement Board or the High-Speed 
Synchronous Enhancement Board, and c an only b e controlled via the front 
panel. In order to be configured as a synchronous DCE, the 7500B must 
have either the Multi-purpose Enhancement Board or the High-Speed 
Synchronous Enhancement Board.
When configured as an asynchronous DTE, the 7500B provides an 
EIA-232D interface and supports full-d uplex data transmission at rates of 
up to 19200 bps. This configuration is most commonly used for modem 
pooling applications. Regardless of the configuration, the 7500B provides 
no voice functions and is not used with voice terminals.
n7400C HSL: 7400C High Speed Link is a d ata service unit that allows d ata 
equipment to access the DCP data services.  It provides synchronous 
data transmission at speeds of 56 and 64 kb ps and provides a link to high 
speed data networks. It c an be used for Group 4 Fax applications that will 
include electronic mail and messaging and electronic storage of printed 
documents and graphics.  It can also be used for video teleconferencing 
and LAN interconnect applications.
n7400D Series or CALLMASTER Terminals: For shared use of voice and 
data, each Voice Terminal requires one port on the following Digital Line 
circuit packs: the 4-wire TN754, TN413, or the TN754B. The TN754B is 
A-law or Mu-law selectable. 603EI CALLMASTER uses the TN754, 
TN754B, or TN2181 circuit pack. The TN2181 is a 2-wire, 16-port, 
A-law/Mu-law selectable circuit pack. The 7403D and 7405D voice 
terminals require an optional digital terminal data module. The 7404D 
requires an optional messaging cartridge, the 7406D requires an optional 
703A Data Stand, and the 7407D requires an optional 702A DSU for 
connection to associated data terminals.
n7500 Series ISDN Voice Terminals: Each 7500 Series ISDN Voice Terminal 
requires one p ort on the TN556 BRI p ort circuit pack. Each voice terminal 
requires an optional ISDN ADM to support asynchronous DTE. Consisting 
of a board located inside the BRI voice terminal, the ISDN ADM allows the 
transmission of inte grated voice and data through one voice terminal. The 
ISDN ADM shares the p ort with its associated voice terminal and supports 
the Hayes command set for comp atibility with PC communications 
packages.
nModems: Each mo dem requires one port on a TN742 or TN746B (A-law) 
Analog Line circuit pack. (Administration designates the modem as a 
2500-series voice terminal and assigns an extension number. A modem is 
connected to the  port instead of a voice terminal. Ac c ess is through the 
assigned extension number.)