Configuring DSL Connections (DSLTNT)

Configuring IDSL voice connections

Figure 17-2. Incoming and outgoing voice calls

I N C O M I N G

channelized T1 or PRI

O U T G O I N G

Incoming calls

PSTN

Incoming IDSL voice calls require that the Central Office (CO) switch support Dialed Number Identification Service (DNIS). DNIS allows the DSLTNT to route incoming calls to the Pipeline or IDSN TA. The DSLTNT does this by comparing the DNIS number it receives to Answer-Number settings in IDSL profiles. When the Pipeline receives this incoming call, it routes the call to a particular phone on the basis of its own port assignments.

Outgoing calls

Outgoing calls require that you configure the DSLTNT to use trunk groups and that the ISDN TA or remote router (such as a Pipeline 75) support en-bloc sending.

Trunk groups assign DSLTNT T1 or E1 channels to groups that are identified by a number. When a user on the IDSL line prefaces the telephone number dialed with the trunk group number, the DSLTNT sends the call out on a channel in the trunk group.

With en-bloc sending, the Setup message that the DSLTNT forwards to the PSTN switch contains all information required to process the call, including the dialed number.

When a user dials out from an analog device connected to the analog port of the Pipeline or an ISDN TA, the user must use the trunk group number as the first digit of the telephone number. (This method is similar to dialing from locations where you must dial with an initial digit to get an outside line before entering the phone number.)

In addition, the user must terminate the telephone number with the pound (#) key. The Pipeline then sends a Q.931 En-Bloc Setup packet to the DSLTNT. The DSLTNT forwards the Setup message to the PSTN switch, which sets up the call.

Configuring the DSLTNT

To configure the DSLTNT for incoming and outoging voice calls, you must configure the following:

An IDSL profile

A Connection profile for the remote device

Trunk groups so the DSLTNT can send outgoing calls to the PSTN

Configuring the IDSL profile

To configure the DSLTNT IDSL profile, proceed as in the following example:

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APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide

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Lucent Technologies 7820-0802-003 manual Incoming calls, Outgoing calls, Configuring the Idsl profile