custom SIP header

Voice & Telephony
1

Hello,

according to SIP server documentation, it should be possible to insert custom parameters to outgoing INVITE message.
It is mentioned on p. 137 of deployment guide (SIP_HEADERS), but not the way how and where to create them. They should be placed in AttributeExtensions section of RequestRouteCall, but i didn’t find how to create them.

I would need to insert Diversion line with the DN number, because our telecom operator is discarding redirected calls outside callcenter (they don’t know whom to bill the calls).

Peter

2

Hi Peter,

What version of SIP Server are you talking about?

You can find detailed description about setup of this feature in “Framework 7.6 SIP Server Deployment Guide” , chapter “Mapping SIP Headers and SDP Messages”. Just be careful as not all described features are available in previous releases of SIP Server. Please check release notes.

R.

3

Hi Rene,

i’m using latest 7.6. I read the section but didn’t understand it quite. There are two ways how to achieve it - 1. edit SIPserver object in CME, 2-edit Troute parameter in URS. We would need to use this 2. way.

Do you have any example syntax of troute function with SIP_HEADERS?

Thanks,

Peter

2 Likes
4

Hi Peter,

I did quick test and here is brief “how to” :wink:

  1. Put a new block of type “MultiFunction” before your “Selection” block in the strategy ( — MultiFunction — Selection)

  2. Add following functions/lines to “MultiFunction” block

    ExtensionAttach[‘SIP_REQUEST_PARAMETERS’,‘req-param-1’]
    ExtensionAttach[‘req-param-1’,‘local’]

  3. Save the strategy and test it

  4. You should see in SIP Server log that RequestRouteCall has the keys “SIP_REQUEST_PARAMETERS” and “req-param-1” in the Extensions.

message RequestRouteCall
AttributeThisDN ‘601’
AttributeConnID 007801a94550a002
AttributeOtherDN ‘301’
AttributeExtensions [265] 00 0C 00 00..
‘InfoToSendInInvite’ ‘INVITE from SIP Server’
‘SIP_REQUEST_PARAMETERS’ ‘req-param-1’
‘req-param-1’ ‘local’
‘DEFAULT#’ ‘9999’
‘CUSTOMER_ID’ ‘Lab’
‘AGENT’ ‘301’
‘PLACE’ ‘Place_301’
‘DN’ ‘301’
‘ACCESS’ ‘301’
‘SWITCH’ ‘SIP’
‘NVQ’ 1
‘TARGET’ ‘vg_ServiceA@lab_rut_statsrv.GA’
AttributeRouteType 0 (RouteTypeUnknown)
AttributeReason [14] 00 01 01 00..
‘RTR’ 116
AttributeReferenceID 19

  1. INVITE issued by SIP Server contains the parameter “req-param-1” in Request URI

    INVITE sip:301@172.18.1.1:13312;req-param-1=local SIP/2.0
    From: sip:303@172.18.1.2:5060;tag=003BFA42-B380-199A-A590-020112ACAA77-8
    To: sip:601@172.18.1.2:5060
    Call-ID: 003BF9D4-B380-199A-A590-020112ACAA77-4@172.18.1.2
    CSeq: 1 INVITE
    Content-Length: 0
    Via: SIP/2.0/UDP 172.18.1.2:5060;branch=z9hG4bK003BFA56-B380-199A-A590-020112ACAA77-12
    Contact: sip:303@172.18.1.2:5060
    Allow: ACK, BYE, CANCEL, INFO, INVITE, MESSAGE, NOTIFY, OPTIONS, PRACK, REFER
    X-Genesys-CallUUID: 01EI265LRCCPL9CG080H5B5AES00000A
    Max-Forwards: 69
    Session-Expires: 1800;refresher=uac
    Min-SE: 90
    Supported: timer

R.

2 Likes
5

Hi Rene,

thanks it works! :slight_smile:

Peter