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Cisco BTS 10200 Softswitch SIP Feature and Provisioning Guide, Release 5.0
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Chapter2 SIP Subscribers
Jointly Provided Features
Number:
Call-Fwd Unconditional
Activate/Deactivate Feature
Set/Change Forwarding Number
Number:
Call-Fwd No Answer
Activate/Deactivate Feature
Set/Change Forwarding Number
Number:
Anonymous Call Rejection
Activate/Deactivate Feature
Do Not Disturb
Activate/Deactivate Feature

SIP Software Clients

The user interface for applicable software clients is similar to a SIP handset user interface.
Call Transfer (Blind and Attended) with REFER
The SIP Call Transfer (CT) feature is supported for SIP subscribers. For SIP phones, this feature is
provided as part of REFER support on the BTS 10200.
The CT feature requires phone support for sending the SIP REFER message. See the phone
documentation for details on the user interface and procedures for effecting a call transfer. Both blind
and attended transfers are supported. Attended transfer to a transfer-target is supported only after the
target answers; that is, consultative attended transfer is supported. Attended transfer is not possible while
the transfer-target is being alerted (ringing state).
The difference between provisioning the feature for SIP and provisioning it for MGCP is as follows:
•Call transfer on both the Cisco IP Phone 7905/7912 and the Cisco IP Phone 7940/7960 is done using
softkeys. On the Cisco ATA 186/188, call transfer is done using the Flash key (or by pressing the
on-hook button briefly) on the analog phone attached to the Cisco ATA 186/188.
•Call-transfer functionality for SIP-based systems is performed using the REFER feature, not the
traditional call transfer (CT) feature. To enable CT for SIP subscribers, you must provision the
REFER feature as an office trigger in the CiscoBTS 10200 Softswitch. See the “SIP Call Transfer
with REFER and SIP INVITE with Replaces” section on page 3-40 for additional details and
provisioning procedures.