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  1. #1
    Registered User
    Join Date
    Mar 2003

    Identifying an 'originating' MMSC

    I am writing an application which will be a single process acting as both an originating and terminating application. This will be required to concurrently connect to more than one MMSC.

    Assuming the MMSC's don't have separate TCP/IP addresses, i.e. they are co-located on a single 'host' but 'listen' for incoming connections on different sockets, then it would seem there is now means to uniquely identify the an originating MMSC when it sends a M-Send.req to my application. This wouldn't matter but my application has to be 'asynchronous' and so must eventually send a final status back to the originating MMSC, assume for now this will not be sent back over the connection established by the MMSC in order to send the M-Send.req.

    It would seem to me that the only practical solutions to this are either:

    Each MMSC has a unique TCP/IP address which I can extract from a connection created by the MMSC and use to identify a particular MMSC.


    Each MMSC is configured to make connection requests on a separate port on the host executing my server application so any incoming connection can only be to one particular MMSC.

    Of course there presumably exists a similar issue for the MMSC but that's not my problem :-)

  2. #2
    Regular Contributor
    Join Date
    Mar 2003
    Texas, USA

    RE: Identifying an 'originating' MMSC


    I hope that I understand your question correctly.

    Assuming you are using TCP/IP as transport, each MMSC opens its own TCP/IP connection to your application when it needs send MMS messages. If using HTTP1.1, this is a persistant connection from the MMSC to your Application until it is terminated by one side or timed-out.

    When you have an application that both sends and recieves MMS messages, then, the MMSC creates 1 Application ID for your application, but it still creates 2 ports... one for originating MMS and one for terminating MMS.

    It is possible to write your application to do either of the 2 solutions you mentioned. However, if you have multiple MMSCs trying to connect to the same port on your application server, eventually, there will be a conflict and one connection will get disconnected/rejected.

    You many want to consult with the policies and configuration of the operator's MMSC which you will be connecting to.

    Good Luck and have fun!

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