3 Replies Latest reply on Jun 5, 2012 9:20 AM by david
      • Re: If a T1 from the network goes down on a 924e, does the D/Channel go down on the PRI
        lukevich Employee




        The 900 if fed from the Provider has indepndent T1's, one for the SIP connection, and


        the second for the PRI. They are tied together with DSP chips that convert packetized voice to


        TDM voice, i.e. tones. If the primary clock goes down , we will revert to the secondary timing source

        or to our Internal oscillator. So the answer is NO, if the SIP side goes down the PRI side would not.

        You can configure a Probe, to busy out the PRI if the SIP side goes down. See also article 3383 configuring a Probe.


        You should be using firmware A4.05.00 or higher, which is available on our website.



        Here is an example as well.



        probe FAILOVER icmp-echo


        destination zzz.zzz.zzz.zzz                                                                         zzz would be an IP address like your SIP server


        source-address xxx.xxx.xxx.xxx                                                                   Means ping zzz from xxx , with xxx being usually the wan address of the adtran


        period 5


        tolerance consecutive fail 5 pass 2                                                                If 5 failures initiate probe track , if 2 pass disable track


        no shutdown




        track WANTRACK


        test if probe FAILOVER


        no shutdown



        voice trunk T02 type isdn


        description "PRI CONNECTION"


        resource-selection circular descending


        busy-out monitor track WANTRACK                                                               says busy-out this PRI if probe track initiated


        caller-id-override number-inbound 2565551212


        connect isdn-group 1




        rtp delay-mode adaptive


        codec-group 729-711

        • Re: If a T1 from the network goes down on a 924e, does the D/Channel go down on the PRI
          david Employee



          I went ahead and flagged this post as "Assumed Answered".  If the response on this thread assisted you, please mark it as Correct or Helpful as the case may be with the applicable buttons.  This will make it visible and help other members of the community find solutions more easily.  If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.