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Information Forwarding support for AT&T In-band Transfer and Connect
Enabling NCR also provides Information Forwarding support for the AT&T Transfer and
Connect In-band network service ISDN D-channel data forwarding capability. The
Information Forwarding feature forwards UUI that is associated with the call to the
"transferred to" location. When NCR is active in the communication server, transferring the
call using Call Vectoring and AT&T In-band Transfer and Connect, the disconnect vector
step includes the codeset UUI IE in the ISDN DISSCONNECT message.
There may be limits placed on the number of times a call may be redirected
over the public network. These limits are imposed by the public network
service provider. For example, in the United States, MCI currently allows
only one redirection per call. In the United Kingdom, there is a limit of 20 call
deflections per call. In addition, there may be additional charges associated
with redirected calls.
Additionally, some public network service providers do not support
forwarding of User-to-User Information (UUI), including ASAI User data,
collected digits, VDN name, the VDN in-time (as reflected by the
NETINTIME database items), and the UCID. This means that Information
Forwarding will be lost and the second leg of the redirected call will look like
an entirely new call to the redirected-to communication server at the second
location. One of the data items lost is the VDN name, which is rerouted to
the originally called service (DNIS) information. The indication that the call
has been forwarded can be achieved by using dedicated VDNs for call
forwarding, but it does reduce the benefits of Information Forwarding
inherent with NCR. Also, this option limits CTI applications as there is no
ASAI information or UCID forwarded.
At this time, no PSTNs are offering the Network Call Deflection "retain call
until alerting/connect" operation. Therefore, only the Network Call Deflection
"clear call upon invocation" offer is available from PSTNs. Both methods are
described in this document. It is advised that you negotiate with your PSTN
as the NCR feature will work on either platform. NCR is limited by which
PSTN platform is available to you.
Network Call Redirection (NCR) (Category A only)
Issue 1.0 May 2003
193
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