7 Replies Latest reply on Oct 24, 2013 4:04 AM by rivera

    No audio two ways - Access 916e (2nd Gen) / OS version A4.11.00.E

    rivera New Member

      Device: Access 916e (2nd Gen)

      AOS: A4.11.00.E

       

      I am doing a new set up with a Access 916e (2nd Gen) and Metaswitch for some reason the call can be established but there is not audio both ways. I guess this may be a problem with the RTP. I did some research in forum and I found the command  "sh media-gateway" here is the output of that command:

       

      sh media-gateway session 0/1.1

      Session 0/1.1 (ACTIVE)
        slot 0, DSP 1, channel 1
        start time: 1:54 PM Wed, Jun 26, 2013, duration: 00:02:31
      Local
        TDM description: FLORIDA CALL
        IP: 10.100.112.253, UDP port: 10000
      Remote
        SIP description: T02
        IP: 96.47.150.10, UDP port: 29498
      Vocoder: G.711 uLaw, VAD disabled, 2 frames per packet
      Echo-cancellation enabled
      Receive
      0 rx packets, 0 rx bytes
        Jitter Buffer Stats:
        0 current depth (bytes), 0 highest depth (bytes)
        50 current delay (ms), 50 highest delay (ms)
        0 late arrival drops, 0 early arrival drops
        0 buffer full drops, 0 unknown packets
        0 flushed packets
        0x0000 0000 sync source
      Transmit
        7512 tx packets, 1201920 tx bytes
        0x3536 1b14 sync source

       

      As you can see the IAD is not receiving packets. My question is: there is another way to troubleshoot this case ?

       

      Thanks in advance

      Jean Louis

        • Re: No audio two ways - Access 916e (2nd Gen) / OS version A4.11.00.E
          jayh Hall_of_Fame

          First thing I would do is move to more recent code.  A4.11.00 is getting long in the tooth.  R10.5.3 would be a good choice.

           

          Debug sip stack messages and look at the SDP, ensure that the IP and ports match the other end.  compare with the INVITE from the Meta or SBC if you have access to them.

           

          "media-gateway ip primary" configured on interface facing the Meta?

           

          Device behind a NAT?

           

          DSP involved - is this a PRI or analog port?  Other calls or other devices have good audio?

           

          Sanitized config would help. 

            • Re: No audio two ways - Access 916e (2nd Gen) / OS version A4.11.00.E
              rivera New Member

              Jayh:

               

              My replies by points:

               

              1- The AOS we are using is old but is the recommended one by the Adtran Technical Support Engineer to do SIP to PRI

              2- The IP to the other end match the configuration

              3-  media-gateway ip primary command is in the right interface

              4- No NAT

              5- This is a SIP to PRI / DSP involve is on my initial information: slot 0, DSP 1, channel 1 / This is a initial set up no other calls at this time

              6- Config is very standard according to "Total Access 900_900e SIP Trunk Quick Configuration Guide"

               

              Thanks

                • Re: No audio two ways - Access 916e (2nd Gen) / OS version A4.11.00.E
                  jayh Hall_of_Fame

                  rivera wrote:

                   

                  My replies by points:

                  ...

                  4- No NAT

                  Local

                    TDM description: FLORIDA CALL

                    IP: 10.100.112.253, UDP port: 10000

                  Remote

                    SIP description: T02

                    IP: 96.47.150.10, UDP port: 29498

                   

                  Your local IP10.100.112.253 isn't routable on the public Internet but the remote side appears to be a public IP, so it would appear that there is a NAT between the device and the Internet, or the local RTP source is incorrect.

              • Re: No audio two ways - Access 916e (2nd Gen) / OS version A4.11.00.E
                jayh Hall_of_Fame

                rivera wrote:

                 

                Device: Access 916e (2nd Gen)

                AOS: A4.11.00.E

                 

                I am doing a new set up with a Access 916e (2nd Gen) and Metaswitch for some reason the call can be established but there is not audio both ways. I guess this may be a problem with the RTP. I did some research in forum and I found the command  "sh media-gateway" here is the output of that command:


                Remote
                  SIP description: T02
                  IP: 96.47.150.10, UDP port: 29498
                Vocoder: G.711 uLaw, VAD disabled, 2 frames per packet

                As you can see the IAD is not receiving packets. My question is: there is another way to troubleshoot this case ?

                 

                Thanks in advance

                Jean Louis

                 

                The 2 frames per packet may be the issue with A4.11.00

                 

                From R10.5.0 release notes:

                 

                • If an unsupported packetization period was presented to the ADTRAN unit in an SDP answer, no indication that the presented ptime was not supported by the ADTRAN unit was sent to the remote user agent. This resulted in no talk path.


                You note in your reply, "The IP to the other end match the configuration".  What I was after was to have you look at the SDP in the SIP message debugs and ensure that the RTP media IP and ports matched and were reciprocal.

                • Re: No audio two ways - Access 916e (2nd Gen) / OS version A4.11.00.E
                  david Employee

                  Rivera,

                   

                  I just wanted to check back in with you to see if you were able to determine the issue.  We would be glad to help troubleshoot further, but we likely need a complete debug and possibly a packet capture.  Feel free to respond on this thread if you have any further questions or updates.

                   

                  Thanks!

                  David

                  • Re: No audio two ways - Access 916e (2nd Gen) / OS version A4.11.00.E
                    david Employee

                    Rivera,

                     

                    I went ahead and flagged this post as "Assumed Answered".  If any of the responses on this thread assisted you, please mark them as Correct or Helpful as the case may be 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.

                     

                    Thanks!

                    David