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Cisco BTS 10200 Softswitch SIP Protocol User Guide
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Chapter 2 SIP Protocol Subscriber Features
Jointly-Provided Features
For calls sent out a Cisco BTS 10200 regular SIP trunk, the following feature behavior applies:
• If the feature is provisioned enabled on the trunk, the SIP Invite message sent contains a ‘Required’
header with a tag value of ‘100rel.’
• If the feature is enabled on the trunk, and the remote endpoint supports or requires the feature, all
provisional responses are sent reliably to Cisco BTS 10200.
• If the feature is enabled on the trunk, and the remote endpoint does not support the feature, the
remote endpoint refuses the call.
• If the feature is disabled on the trunk, the SIP Invite message sent contains a ‘Supported’ header
with a tag value of ‘100rel.’
• If the feature is disabled on the trunk, and the remote endpoint supports the feature, the remote
endpoint controls which provisional response sent requires reliability.
• If the feature is disabled on the trunk, and the remote endpoint does not support the feature,
provisional responses are not received reliably.
For SIP-T calls received on a Cisco BTS 10200 SIP trunk provisioned as SIP-T, the following feature
behavior applies:
• If the received INVITE indicates this feature is required or supported, all provisional responses are
sent reliably.
• If the received INVITE indicates the feature is not supported, the call is refused.
• For all calls sent out a Cisco BTS 10200 SIP trunk provisioned as SIP-T, the following feature
behavior applies:
• The SIP-T Invite message sent contains a ‘Required’ header with a tag value of ‘100rel.’
• If the remote endpoint supports or requires the feature, all provisional responses are sent reliably to
Cisco BTS 10200.
• If the remote endpoint does not support the feature, the remote endpoint refuses the call.
Text-GUI Features
Cisco BTS 10200 supports SIP client/handset text-based user interface (UI) provisioning for a select set
of features. This is in contrast to numerous supplementary features supported natively by the SIP
client/handset itself. Some of the features require updating the status on the network database.
Cisco BTS 10200 provides complimentary support to SIP clients/handsets to update end user feature
access status on the switch network database.
Provisioning in this context refers to feature activation or deactivation, and setting any applicable
Directory Numbers (DNs) associated with the feature. If a SIP handset is used, the phone’s LCD panel
is used as a menu display area to guide the user toward feature provisioning. If a SIP software client is
used, the UI display region in the client software is used to guide the user through feature provisioning.
There may be multiple lines on the SIP phone, but currently services configured using softkeys on the
phone are only available to one of those lines. The subscriber for that line is provisioned by
Cisco BTS 10200 with the MAC address of the phone (see “MAC to Subscriber” section on page 5-25).
Supported Handsets
Cisco BTS 10200 supports any SIP client/handset that supports CallManager XML 3.0.
