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ISDN Line Parameter Tables A-5
AT&T 5ESS Switch NI1
To order ISDN service for the AT&T® 5ESS switch, supply the
telephone company with the information provided in
Table A-2.
Table A-2 Line Configuration for AT&T 5ESS NI1
Required Information Specification
Line Type Standard (2B+D) National ISDN-1 line
Line Code 2B1Q
Interface Type U interface
Directory Numbers 2
*
Maximum Terminals 1
Maximum B Channels 2
*
Actual User Yes
Circuit-Switched Voice 2
*
Circuit-Switched Voice Channel Any
Circuit-Switched Data 2
Circuit-Switched Data Channel Any
Terminal Type A (Basic Terminal)
Display Yes
Circuit-Switched Voice Limit 2
*
Circuit-Switched Data Limit 2
Voice or Data Both
Call Appearance Preference Idle
Flexible Call Offering (FCO) Yes
†
Additional Call Offering (ACO) Yes
‡
Caller ID Yes
**
Call Forwarding Variable Yes
††
* The Directory Number, Circuit-Switched Voice, Maximum B Channels, and Circuit-Switched Voice
Limit parameters should be set to 2 to allow both analog ports to be used simultaneously. If those
parameters are set to 1, the ISDN line can only place or receive one call at a time.
† Flexible Calling (FCO) provides 3-Way Calling (Call Conference), Hold, Drop, and Transfer from
analog equipment attached to the modem.
‡ Additional Call Offering (ACO) allows you to use incoming Dynamic Bandwidth Allocation (DBA) as
well as Call Waiting.
**Caller ID is necessary to employ the Call Logging feature. If you would like to have Call Logging,
you must order Caller ID. However, Caller ID itself, which requires an external device to monitor
incoming calls, is not supported.
††Call Forwarding allows you to forward calls to another telephone number.