2 Replies Latest reply on Sep 19, 2013 10:48 AM by vmirinav

    PRI from 908e to 7100 giving - ISDN.EP     PRI  1  D channel is DOWN

    vmirinav New Member

      Dear All,

       

      I trying to setup a PRI to PRI connection from 908e to 7100

       

      Currently I am getting an error:

       

      On 908e I have:

       

      interface t1 0/2
        description PRI Handoff to 7100
        tdm-group 3 timeslots 1-24 speed 64
        no shutdown

       

      interface pri 3

        description pri 3

        connect t1 0/2 tdm-group 3

        role network b-channel-restarts enable

        no shutdown

       

      isdn-group 3

        connect pri 3

       

      voice trunk T02 type isdn

        description "PRI to 7100"

        resource-selection linear ascending

        connect isdn-group 3

        rtp delay-mode adaptive

        codec-group "g711 first"

       

      voice grouped-trunk "SIP TO 7100 PORT 2"

        description "PRI to 7100"

        trunk T02

        accept 1-NXX-NXX-XXXX cost 0

        accept NXX-XXXX cost 0

        accept 911 cost 0

        accept N11 cost 0

        accept 011-$ cost 0

        accept 347-670-1996 cost 0

      !

       

      On 7100 I have:

       

      isdn-group 1

        connect pri 1

       

      interface t1 2/1

        description T1/PRI

        system-timing primary

        tdm-group 1 timeslots 1-24 speed 64

        no shutdown

       

      interface pri 1

        description pri 1

        role network b-channel-restarts enable

        connect t1 2/1 tdm-group 1

        no shutdown

       

      voice trunk T05 type isdn

        description "PRI"

        resource-selection circular descending

        no reject-external

        connect isdn-group 1

        match dnis "411" substitute "18004664411"

        rtp delay-mode adaptive

       

      voice grouped-trunk "T1/PRI TRUNKS"

        description "Outgoing T1/PRI trunk with low cost routing T1 Disabled"

        trunk T05

       

      The error I am getting is:

       

      ISDN.EP PRI  1  D channel is DOWN

       

      Its nonstop.....I tried different cables and it still fails.

       

      If anyone can help I would be very grateful.

       

      Warm Regards,

       

      Vi

        • Re: PRI from 908e to 7100 giving - ISDN.EP     PRI  1  D channel is DOWN
          jayh Hall_of_Fame

          On the 908e (or any 9XXe) gen 1 and gen 2, only T1 ports 3 and 4 can be used to terminate PRI or CAS.  T1 0/1 and 0/2 are for data only.  There's a subtle hint about this printed next to the connectors themselves.

           

          Try:

           

          interface t1 0/2
            description unused

            shutdown

           

          interface t1 0/3
            description PRI Handoff to 7100
            tdm-group 3 timeslots 1-24 speed 64
            no shutdown

           

          interface pri 3

            description pri 3

            no connect t1 0/2 tdm-group 3

            connect t1 0/3 tdm-group 3

            role network b-channel-restarts enable

            no shutdown

           

          Then move the cable from T1 0/2 to t1 0/3.

           

          You will probably need a T1 crossover cable between the TA908e and the 7100. This is different from an Ethernet crossover and you'll likely have to wire it yourself.  If the T1 itself is down (red light on TA908e) then try a crossover cable.

           

          A end          B end

           

          1                  5

          2                  4

           

          4                  2

          5                  1

           

          Pins 3, 6, 7,and 8 can be omitted or wired straight, they're not used.

          • Re: PRI from 908e to 7100 giving - ISDN.EP     PRI  1  D channel is DOWN
            vmirinav New Member

            Ok that explains it. If I use t 0/3 it works fine. Thank you very much for help.