7 Replies Latest reply on Jan 13, 2015 7:34 AM by 175k9er

    voice delay in  3430 SBC

    matge New Member

      I have voice delay on all call, inbound and outbound with 3430 SBC.

      Provider sip ->3430 ->Shoretel ip pbx

       

      When I do in bound call the pbx start the auto attendant, but I can ear it only 4 seconds later. Same think for the outbound calls.

      Thanks to help me to solve this.

      Marc

        • Re: voice delay in  3430 SBC
          jayh Hall_of_Fame

          Do you mean that the first four seconds of the message are cut off, or that you hear the entire message but with very long latency? 

           

          The only time we've seen long latency is when the network link between the devices had very high utilization with QoS wrongly set to queue RTP rather than prioritize it.

           

          Do human-to-human calls work OK and the issue is just with the auto attendant?

            • Re: voice delay in  3430 SBC
              matge New Member

              Yes, the first four seconds of the message ar cut off, and when we did outbound call same think the first four seconds are cut off, after this we can discuss without any cut or glitch.


                • Re: voice delay in  3430 SBC
                  jayh Hall_of_Fame

                  Do a "debug sip stack messages", place a call and look at the "200 OK" timing through the device while listening to the auto-attendant.  See if the Shoretel is sending it late or if the 3430 is delaying it for some reason.

                   

                  You might also no-out ip rtp media-anchoring and see if that makes a difference.

                    • Re: voice delay in  3430 SBC
                      matge New Member

                      I did and can see : 09:03:08.257 SIP.STACK MSG        SIP/2.0 200 OK 

                      When I place a call, I can see the Shoretel answer right away and the auto attendant start automatically, but I can hear it 4 seconds later, and some words miss.



                        • Re: voice delay in  3430 SBC
                          Employee

                          matge - I took a look at your configuration and I would recommend you add a rule to allow SIP through the public interface. The simplest way to do this is to add an allow rule under your 'AdminAccess' ACL that allows UDP port 5060 through. Your ACL would look something like this:

                           

                          ip access-list extended AdminAccess

                             remark AdminAccess

                             permit tcp any any eq telnet

                             permit tcp any any eq https

                             permit udp any any eq 5060

                           

                          I also agree with jayh's suggestion that you disable media-anchoring if you are not using it.

                           

                          Please let us know if you are still experiencing issues.

                           

                          Thanks,

                          Noor

                          1 of 1 people found this helpful
                            • Re: voice delay in  3430 SBC
                              Employee

                              matge -

                              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 have any additional information on this that others may benefit from, please come back to this post to provide an update. 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.


                              Thanks,

                              Noor

                            • Re: voice delay in  3430 SBC
                              175k9er New Member

                              Matge, I realize this post is two years old, but I was just curious what your solution to this issue was.  We have a customer that is receiving this same (approximately) 4 second delay when a call is picked up.  Any insight into how you resolved your issue would be greatly appreciated.