Cisco Cisco Customer Voice Portal 8.0(1)

In the event that the called party disconnects before the caller, and no further instructions are sent from 
ICM within 2 seconds, the Voice Browser checks a list of Dialed Number Identification Services to see 
if the call should be restarted to an alternate DNIS number. The called party can be any Customer Voice 
Portal transfer agent, including, a TDM IVR, an IPCC agent, or even the transfer to the IVR leg in the 
Comprehensive model. The Voice Browser does not differentiate the type of transfer target that 
disconnected.

The original call and the restarted call to ICM each contain the same call ID (media_id ECC variable) 
so that the ICM scripts can correlate the two calls for database query purposes.

The timeout value that the caller waits before being connected to the post-call ICM script can be changed 
using the SetCalledPartyTimeout command in VBAdmin. The default value is 2 seconds.

The Voice Browser can distinguish between a called party who hangs up normally or a called party who 
is disconnected abnormally, such as that caused by a crash of the target IOS gateway or Call Manager. 
In the event of an abnormal disconnect of the called party, the Voice Browser will not invoke the 
SurveyDnis restart unless SetNewCallOnly command in VBAdmin is set to 'on' (default is 'off'). If the 

IPCC Local Transfer

Executes a transfer within the VoIP network using the 
Cisco Call Manager.

Valid for Customer Voice Portal 
deployed as a Service Node IVR.

The CCM is responsible for performing 
the transfer. 

Restart to alternate 
Dialed Number 
Identification Service 
(DNIS)

In the event that the called party disconnects before the 
caller, and no further instructions are received from 
ICM within 2 seconds, the Voice Browser checks a list 
of Dialed Number Identification Services to see if the 
call should be restarted to an alternate DNIS number. 

Useful for conducting a post-call survey 
with the caller to evaluate the 
effectiveness and quality of the caller 
experience.

Two B-Channel Transfer 
(TBCT)

TBCT is a call-transfer standard for ISDN interfaces. 
This feature enables a Cisco voice gateway to request 
an NI-2 switch to directly connect two independent 
calls. The two calls can be served by the same PRI or 
by two different PRIs on the gateway. This feature is 
based on Telcordia GR-2865-CORE.   

TBCT makes efficient use of resources by releasing 
two B-channels after a call transfer. Blind transfer of 
PSTN calls can happen outside the Cisco gateway 
without tying up gateway resources. Although the 
gateway is not involved after calls are transferred, 
billing continues as though the calls are still connected 
to the gateway. 

Customers using this feature need to have special 
agreements with their ISDN service provider regarding 
billing, or optionally, the gateway can subscribe to get 
notification from the switch when a transferred call 
clears. 

To use the TBCT feature with Customer 
Voice Portal, the following conditions 
must be met: 

•You can use any Customer Voice Portal 
model except Advanced Speech.

•PRI interface is subscribed to TBCT 
service from ISDN service provider. 

•The incoming call leg to Customer 
Voice Portal and the outgoing transfer 
call leg from Customer Voice Portal use 
the same PRI or both PRIs are part of the 
same trunk group.