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Transparent IAM

    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)})