A-6 APPENDIX A: ORDERING ISDN SERVICE

AT&T 5ESS Custom Switch

To order ISDN service for the AT&T 5ESS Custom switch, photocopy and fax Table A-3to the telephone company.

Table A-3 Line Configuration for AT&T 5ESS Custom

Required Information

Specification

 

 

Line Type

Standard (2B+D) ISDN line with point-to-point

 

configuration

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)

No†

Additional Call Offering (ACO)

No‡

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. The 3C882 ISDN modem does not support FCO for use with an AT&T 5ESS Custom Switch.

‡Additional Call Offering (ACO) allows you to use incoming Dynamic Bandwidth Allocation (DBA) as well as Call Waiting. The 3ComImpact IQ does not support ACO for use with an AT&T 5ESS Custom Switch.

**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.