Convert X-UserToUser header to User-To-User header and change the protocol
discriminator to Q931 in the header as follows:
User-to-User:
083030373435313734313635353b313233343b3834;encoding=hex
Message Type Condition Action Subject
Action
Type
Action Value
header.X-
UserToUser.user2user
Modify '2'
header.X-
UserToUser.pd
Modify '9'
Notes:
• Changing the message format to ‘hex encoding’ causes the header name
to change from X-UserToUser to User-To-User.
• The default protocol descriptor added to the header when using hex
encoding is 4. To set a protocol descriptor other than 4, modify the
protocol descriptor field (PD) to one more than the value you require. See
example Rule 2 above.
42.2.37 Via
An example of the header is shown below:
Via: SIP/2.0/UDP 10.132.10.128;branch=z9hG4bKUGOKMQPAVFKTAVYDQPTB
The header properties are shown in the table below:
Header Level Action Add Delete Modify List Entries
Operations Supported No No No 10
Keyword Sub Types Attributes
Alias Boolean Read Only
Branch String Read Only
Host Host Structure (see 'Host'
on page 437)
Read Only
MAddrIp gnTIPAddress Read Only
Param Param Read/Write
Port Integer Read Only
TransportType Enum TransportType (see
'TransportType' on page
450)
Read Only
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