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Cisco BTS 10200 Softswitch SIP Feature and Provisioning Guide, Release 5.0
OL-12397-13
Chapter2 SIP Subscribers
SIP Phone Initialization
SIP Phone Initialization
Figure 2-1 shows an example of SIP phone initialization on bootup, that is, how a typical phone might
initialize itself and establish its identity with the BTS 10200.
The image shows actions that occur external to the BTS10200—It does not show how the BTS 10200
controls SIP initialization. Instead, it shows how a client can establish its identity with the BTS10200.
The circled numbers in the image indicate the numerical order in which the sequence occurs.
Figure 2-1 Example of SIP Phone Initialization
Provisioning a SIP Subscriber
To provision a SIP subscriber, see the “SIP Subscriber Provisioning” chapter in the Provisioning Guide.
SIP Registration and Security
SIP subscribers use the SIP REGISTER method to record their current locations with the BTS 102 00.
Registering clients can specify an expiration time for the contacts being registered. However, the
BTS 10200 has a minimum and maximum acceptable duration, both of which are configurable.
Note Third-party registration is not supported.
It is possible to register multiple contacts for a single AOR; however, if multiple contacts are registered
for a single subscriber, the 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.
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