2 Replies Latest reply on Jun 19, 2012 7:37 AM by geo

    CAC (Call Admission Control) in TA908

    sthieneman New Member

      I am trying to configure CAC (Call Admission Control) in a TA908 and cannot find an info.  Does anyone have an example config that they could share?

       

      Thank you,

      Stephen

        • Re: CAC (Call Admission Control) in TA908
          geo Employee

          Hello and thank you for posting to our forum.

           

          If you have some basic SIP configuration for your application, I can help you come up with a config that should work in the same manner as CAC.

           

          What type of physical connection do you have from the ADTRAN to the SIP Server or next hop?  T1, Ethernet?

          Do you know if you will be using G.711 or G.729 for calls out the SIP trunk?

           

          Based on the answers to the questions above, we can calculate the max-number of calls to be allowed on the SIP voice trunk.  For example, if you are using G.711, we can approximate the bandwidth of each call be be about 90k.  If you have a  data T1 connection, then you have about 1544k bandwidth.  1544k / 90k = 17.16 calls.  To be safe, you can set the max-number of calls to 15 (although 17 should be fine).

           

          In addition, we can put an accept with a higher cost on a different voice trunk so the ADTRAN will use a different trunk (and a different physical interface on the ADTRAN) should the max-number of calls be reached on the SIP trunk.  Below would be an example config:

           

          voice trunk T01 type sip

          description "T1 to SIP"

          sip-server primary 10.1.1.250

          max-number-calls 15

          !

          voice trunk T02 type sip

          description "Overflow SIP"

          sip-server primary 192.168.1.250

          !

          voice grouped-trunk SIP

          trunk T01

          accept $ cost 0

          !

          voice grouped-trunk Overflow

          trunk T02

          accept $ cost 50

           

          Let me know if you have any questions.

           

          Regards,

          Geoff

          1 of 1 people found this helpful
            • Re: CAC (Call Admission Control) in TA908
              geo Employee

              Hello Stephen,

               

              I went ahead and flagged this post as “Assumed Answered.” If any of the responses on this thread assisted you, please mark them as either Correct or Helpful answers with the applicable buttons. This will make them visible and help other members of the community find solutions more easily. If you still need assistance, I would be more than happy to continue working with you on this - just let me know in a reply.

               

              Regards,

              Geoff