Agreed, we do that too...puts 2 sec delays on IVRs. However, we are getting complaints from users who answer their phone - like Your sample office receptionist below. Ujjval Karihaloo VP Voice Engineering IP Phone: +13032428610 E-Fax: +17202391690 SimpleSignal Inc. 88 Inverness Circle East Suite K105 Englewood, CO? 80112 -----Original Message----- From: David Hiers [mailto:hiersd at gmail.com] Sent: Wednesday, January 06, 2010 10:40 AM To: Ujjval Karihaloo Cc: voiceops at voiceops.org Subject: Re: Re: [VoiceOps] Delay on RTP for Inbound Calls Of course, even if the protocol did not have such gaps, there is a lot of state that has to be managed in a lot of devices in the time between the thoroughly frappachinoed receptionist hitting the answer button and spewing "ThankYouForCallingMetropolisSpeedSpeakingInstitute!ItsAGreatDayToSuperChargeYourSpeachHowMayIDirectYourCall" into the headset. I"ve often considered re-recording all stored prompts and announcements to prefix 2 seconds of silence, as well as grinding some 'ludes into the frap mix. David On Wed, Jan 6, 2010 at 8:23 AM, <hiersd at gmail.com> wrote:
Some of the initial clipping is endemic to the technology. RFC 3960 alludes to some of the challenges.
David
On Jan 6, 2010 3:53am, Ujjval Karihaloo <ujjval at simplesignal.com> wrote:
On Polycoms ?we are running 3.1.2 on most, some are running latest 3.2.2. ?Level 3 has mentioned RTP SSRC could b an issue, but they have no firm data backing it up. It also happens with Asterisk based VoIP PBX's always without fail.anyone experienced that? I will take it up with Level 3. Ujjval Karihaloo
On Jan 6, 2010, at 12:54 AM, "Lee Riemer" lriemer at bestline.net> wrote:
I dug up the old email and they upgraded to 3.1.3.
On Jan 5, 2010, at 11:55 PM, Ujjval Karihaloo ujjval at simplesignal.com> wrote:
Agreed, Just checked the RTP timestamps for the RTP Stream from my SBC to level 3 Media gateway ?- Time and Seq numbers look perfect with gaps or ?no issue there at all.
Ujjval Karihaloo
-----Original Message----- From: Matt Yaklin [mailto:myaklin at g4.net] Sent: Tuesday, January 05, 2010 10:50 PM To: Lee Riemer Cc: Ujjval Karihaloo; voiceops at voiceops.org Subject: Re: [VoiceOps] Delay on RTP for Inbound Calls
On Tue, 5 Jan 2010, Lee Riemer wrote:
I forgot, we had this issue with invalid RTP sequence numbers with old Polycom firmware. ??Are you using Polycom phones?
If that was the case would not his captures of the traffic and the resulting replay be mangled at every point me mentions below?
matt
On 1/5/2010 11:31 PM, Ujjval Karihaloo wrote:
????I trace a call?on my cell phone I hear the first 1 -2 seconds clipped?however the trace sounds fine?.
????Traced at SBC side facing Level 3
????Traced at SBC side facing Customer (who receives inbound call)
????Traced at Customer Prem
????All the above 3 traces the Audio sounds fine, but on my cell phone I miss the first 2 seconds.
????Ujjval Karihaloo
From: voiceops-bounces at voiceops.org [mailto:voiceops- bounces at voiceops.org] On Behalf Of Lee Riemer Sent: Tuesday, January 05, 2010 10:15 PM To: voiceops at voiceops.org Subject: Re: [VoiceOps] Delay on RTP for Inbound Calls
Have you captured via wireshark and replayed? ?Do you hear the same delay? ?Is there a delay between the OK (answer) and the audio?
On 1/5/2010 8:22 PM, Ujjval Karihaloo wrote:
Hi Guys;
??We have noticed that sometimes when calling into our DIDs (Level 3 DIDs), there is a 2-3 second lag. i.e. Cell phone caller (party A) calls into a DID (Party B) that is on our network (Broadsoft Softswitch), Party B answers and sayd 1,2,3,4,5 ? but the Party A only hears 4, 5?The part i.e. 1,2,3 get cut off.
Plus it is sporadic and difficult to reproduce, was wondering if folks have encountered this and any good troubleshooting techniques you can recommend.
Ujjval Karihaloo
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