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Cisco BTS 10200 Softswitch SIP Protocol User Guide
OL-5352-03
Chapter 2 SIP Protocol Subscriber Features
SIP Devices
The following Cisco SIP devices, when running a SIP application image, are supported on
Cisco BTS 10200:
• Cisco ATA 186/188
• Cisco IP Phone 7905
• Cisco IP Phone 7912
• Cisco IP Phone 7940
• Cisco IP Phone 7960
For more information on provisioning devices, refer to the Provisioning SIP Devices section in the
Cisco BTS 10200 SIP Protocol Provisioning Guide.
You can find the detailed step-by-step administration guide for the Cisco ATA 186/188 adaptors at:
http://www.cisco.com/univercd/cc/td/doc/product/voice/ata/ataadmn/index.htm
You can find the detailed step-by-step administration guide for the Cisco 7905/7912 phones at:
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_ipphon/english/ipp7905g/addprot/index.htm
You can find the detailed step-by-step administration guide for the Cisco 7940/7960 phones at:
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_ipphon/sip7960/sadmin31/index.htm
For multiple line SIP phones, each line must be provisioned with a DN/Subscriber entry in the
Cisco BTS 10200 Softswitch.
SIP Registration
SIP subscribers use the SIP REGISTER method to record their current locations with Cisco BTS 10200.
Registering clients may specify an expiry time for the contacts being registered. However,
Cisco BTS 10200 has a minimum and maximum acceptable duration which are configurable.
It is possible to register multiple contacts for a single Address of Record (AOR); however, in Release
4.4, if multiple contacts are registered for a single subscriber, Cisco BTS 10200 uses only the most
recently registered contact to deliver the call to that subscriber. For this reason, multiple contacts are not
supported.
Note Only one contact should be registered for an AOR in Release 4.4.
When a SIP user attempts to register or set up a call, the Cisco BTS 10200 challenges the SIP subscriber
based on the Serving Domain Name Table. If the Serving Domain Name Table indicates that
authentication is required, Cisco BTS 10200 challenges the SIP request (Register/INVITE, as per the
authentication procedures specified in the SIP Protocol RFC 3261). If the Cisco BTS 10200 receives
valid credentials, then the authenticated AOR from the User Authentication table identifies the
subscriber based on the Address of Record to Subscriber table.
Registration creates bindings in Cisco BTS 10200 that associate an AOR with one or more contact
addresses.
The registration data is replicated on the standby Cisco BTS 10200 Softswitch. The Cisco BTS 10200
imposes a minimum registration interval as a provisionable value. If the expiration duration of the
incoming registration request is lower than the provisioned minimum, a 423 (Interval Too Brief)
response is sent to the registering SIP endpoint.