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SPIROU

    To enable SPIROU support in NSG version 4.1+, the following two options must be enabled

    1. Transparent IAM
    2. ITX/TXA Auto Reply
    The following steps will guide you how to enable spirou in NSG:

    1. Under "SS7 Channel Configuration" click on "Show advanced Options"
      spiroux1.png


    2. After expanding 'Show Advanced Options", enable "Transparent IAM" and "ITX/TXA Auto Reply".

      select4.png

      Perform the above steps for all spans (voice and signaling)

     

    Transparent IAM 

    The purpose of transparent IAM is to pass-through all the information elements contents from the inbound IAM to the outbound IAM for SS7-to-SS7 calls

    When the Transparent IAM feature is enabled, on incoming calls, all the information received in the incoming IAM message are stored inside a channel variable. This allows the IAM message to be transmitted out with the exact same information if needed.


    Transparent IAM is Sangoma proprietary version of SIP-I and SIP-T.  It only works back to back between two Sangoma NSG gateways.


    Transparent IAM.gif
     

    SIP Headers

    For transparent IAM to work, your target SIP gateway needs to passthrough the X-FreeTDM-IAM SIP header to the b-leg of the call.

    For example, if using Asterisk:
    in /etc/extensions.conf:

    [from-nsg]
    exten => _X.,1,SIPAddHeader(X-FreeTDM-IAM:${SIP_HEADER(X-FreeTDM-IAM)})

     

     

    ITX and ITA Messages

     

    ITX_TXA_SPIROU.png

    When France Telecom send you an ITX ISUP message, NSG must reply with a TXA message.