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Two B-Channel Transfer: Quick Configuration Guide

Two B-Channel Transfer: Quick Configuration Guide

Quick Configuration Guide (QCG)

[Two B-Channel Transfer]


Two B-Channel Transfer (TBCT) enables a PBX connected to a PRI interface to connect two independent calls

together. Once the Adtran accepts the request, the PBX is released from the call and the two call legs are

transferred on the SIP trunk using the REFER method.  TBCT is the National ISDN (NI-2) variant of ISDN Explicit

Call Transfer Supplementary Service.

The feature is configured on the PRI interface and is intended only for SIP to PRI and PRI to SIP calls. It is not

supported when one or both calls are connected via analog FXS, analog FXO, or a T1-CAS trunk.

To achieve similar functionality for DMS and ETSI, Release Link Trunk (RLT) and Explicit Call Transfer (ECT)

must be configured respectively. ETSI is only supported in the NV 6310/6330.

This feature was added in A2.05.00

Supported Platforms

TA 900/900e series IPBGs

NV 6000 series IPBGs

Command Line Interface Configuration

Switch Type: NI-2 and 5ESS

TBCT as defined by GR-2865-CORE

Command: [no] isdn supplementary-service tbct

Help: Enable/Disable NI-2 Two B-Channel Transfer

Default: no supplementary-service tbct

Command: [no] isdn supplementary-service tbct notify-controller

Help: Enable/Disable NI-2 TBCT Notification to Controller

Default: no supplementary-service tbct notify-controlle

Command: [no] isdn supplementary-service tbct transfer-counters

Help: Enable/Disable the usage of transfer counters during TBCT

Default: supplementary-service tbct transfer-counters

Note: This command is required for the Nortel interpretation of the NI-2 specification

Command: isdn supplementary-service tbct active-transfers <0-60000>

Help: Set the number of simultaneous transfers

Default: supplementary-service tbct active-transfers 100

Note: Only has an effect if “transfer-counters” is enabled.

Command: isdn supplementary-service tbct transfer-rate <0-500>

Help: Set the number of transfers allowed within a 10 second interval

Default: supplementary-service tbct transfer-rate 10

Note: Only has an effect if “transfer-counters” is enabled.

Command: [no] isdn supplementary-service tbct d-channel-id (auto | <0 – 0xFFFFFFFF>)

Help: Set the d-channel-id for TBCT across multiple interfaces

Default: supplementary-service tbct d-channel-id auto

Note: The “no” command sets to auto.

Switch Type: DMS

RLT as defined

Command: [no] isdn supplementary-service rlt

Help: Enable/Disable DMS Release Link Trunk

Default: no supplementary-service rlt

Switch Type: ETSI

ECT as defined by ETS-300-369

Command: [no] isdn supplementary-service ect

Help: Enable/Disable ETSI Explicit Call Transfer

Default: no supplementary-service ect

Example Configuration

(config-pri 1)#isdn supplementary-service tbct

(config-pri 1)#isdn supplementary-service tbct notify-controller

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Last update:
‎02-01-2012 07:58 AM
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