Cisco Cisco Customer Voice Portal 8.0(1)

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Step 2
If you are going to send SIP headers back to Unified CVP, then you can modify the
Call.SIPHeader variable using a Set node in the Unified ICM script.
Note:
• The header length (including header name) after modification should not exceed 200.
• In the Unified ICM script, you delimit the header, operation, and value with a tilde character,
and use the bar character to concatenate operations.
Examples of modifying headers.
Adds a Call-Info header with the proper call info syntax as per RFC3261:
"Call-Info~add~<sip:x@y>;parm1=value1"
Short Form notation, plus concatenated operations. Adds a VIA header and modifies the From
header:
"Via~add~SIP/2.0/UDP viaHost"  Adds a Via header to the message.
"v~add~SIP/2.0/UDP viaHost|f~mod~<sip:123@host>;parm1=value1" 
The following operation will fail due to incorrect syntax of Call-Info header per RFC 3261.
You will see a WARN message in the CVP log. This is enforced in the stack.
"Call-Info~add~parm1=value1" 
From header add and modify will do the same thing, since only one From header is allowed in
a message per RFC 3261. This is enforced in the stack.
"From~add~<sip:x@y>;parm1=value1"  
"Call-ID~add~12345@xyz"  Same as From header, only one allowed. 
"Call-ID~mod~12345@abc" Same as From header, only one allowed.
Configuring the Cisco Integrated 3G-H324M Gateway for Unified CVP
The Cisco Integrated 3G-324M Gateway - or Video Gateway - allows multimedia
communications (H.324M) between 3G (third generation) mobile handsets and Cisco AS5xxx
Universal Gateways.
Before you Start
You must configure the Cisco Integrated 3G-H324M Gateway, by following standard IOS
procedures. Refer to the information about Cisco Integrated 3G-324M Gateway for more in-depth
information: 
 (http://www.cisco.com/en/US/docs/video/
milticomm/3g324m.html).
Configuration and Administration Guide for Cisco Unified Customer Voice Portal Release 8.0(1)
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Chapter 11: Configuring the SIP Devices
Configuring the Cisco Integrated 3G-H324M Gateway for Unified CVP