Add UUI to call transfer

Voice & Telephony
1

Hi,

I need to make a blind transfer from an IRD strategy, but before transfer the call I need to add the Sip UUI header.

My test strategy is a simple multi function block with:

Update[‘UU_DATA’,‘1234567890abcdef;encoding=hex;purpose=isdn-network;content=isnd-uui’]
TRoute[‘3211’,‘’,RouteTypeUnknown,‘’]

The call transfer is OK but on destination PBX I don’t see the UUI (checked with a wireshark trace).

Anyone can point me in the right direction?

Thanks,
Max

2

You can do it two ways:

  1. Configure SIP server options that map ‘UU_DATA’ to the ‘User-to-User’ header
  2. Use AttributeExtensions to attach the header and instruct SIP server to include it in the SIP message

Using method two, the example would be:

ExtensionUpdate[‘SIP_HEADERS’, ‘User-to-User’]
ExtensionUpdate[‘User-to-User’, ‘’]

3

Thank you very much. It worked.

Max