CUBE can customize the SIP messaging on either side to what the devices in that segment of the network expect to see by normalizing the SIP messaging on the network border, or between two non-interoperable devices within the network.
Service providers may have policies for which SIP messaging fields should be present (or what constitutes valid values for the header fields) before a SIP call enters their network. Similarly, enterprises and small businesses may have policies for the information that can enter or exit their networks for policy or security reasons from a service provider SIP trunk.
In order to customize SIP messaging in both directions, you can place CUBE with a SIP normalization configuration at the boundary of these networks.
Use SIP Profile as a Translation feature to Normalize SIP Traffic coming in to SP Network or Enterprise Network at the border entry points.
I have created this blog based on my learning experience when configuring SIP Profile on Cisco Unified Border Element (CUBE) deployed at Service Provider network.
SIP Profiles: When/How Applied ?
This diagram explains the SIP Profile application.
Sample Dial-peer configuration for the call flow :
dial-peer voice 1 voip
incoming called-number .T
session protocol sipv2
dial-peer voice 4 voip
session target ipv4:192.168.1.10
session protocol sipv2
1. SIP Profiles feature is a powerful tool that can adjust SIP messages as needed
2. Exercise CAUTION when applying SIP Profiles - ensure that it does not “create” interop issues, rather than solving them.
3. SIP Profiles apply only to outgoing SIP messages
4. Changes to the messages are applied just before they are sent out
SIP Profile Configuration - Example
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