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CHAPTER
2-1
Cisco BTS 10200 Softswitch SIP Protocol User Guide
OL-5352-03
2
SIP Protocol Subscriber Features
With Release 4.4, Cisco BTS 10200 supports SIP subscribers such as SIP phones compliant with RFC
3261 or RFC 2543. The SIP protocol support in Cisco BTS 10200 provides the capability to provision
subscriber features, and to allow SIP devices to work with the Cisco BTS 10200 Softswitch. This chapter
describes the subscriber features.
For quick-reference tables listing the Subscriber features, see Chapter 1.
SIP Phone Initialization
Figure 1 shows SIP phone initialization on bootup.
The image shows actions that occur external to Cisco BTS 10200—it does not show how
Cisco BTS 10200 controls SIP initialization, but rather is representative of how a client may establish
its identity with Cisco BTS 10200.
The numbers in the image reference the numerical order in which the sequence would occur.
Figure 1 SIP Phone Initialization
87899
Cisco BTS 10200
Softswitch
4
2
5
6
7
3
8
IP
DHCP
TFTP
DNS
IP_Addr,
Gateway,
TFTP Srv & Files
Help me
boot
1
Who am I?
Config File,
Image, SIP Info
Cisco BTS
10200 IP
Address?
Cisco BTS
10200's
IP_Addr
REGISTER
200 OK