Hi, Does anyone have any clues on this? It sounds like the problem is
happening to other people as well, and I'm almost certain there is an easy
answer to what is wrong.
Any help would be greatly appreciated.
Pete
On Fri, Jan 30, 2009 at 2:13 PM, Peter Grace <[email protected]> wrote:
> Hello list,
>
> I have been trying to get SIPp to send rtp audio and have run into a
> roadblock. I am getting the audio on the remote end, but there is a serious
> hash/buzz over the audio. You can just barely hear the proper audio sample
> underneath all of the buzz. Has anyone run into this problem before?
>
> I am including as much info as I can in hopes the answer will be as simple
> as "your header is malformed" or "you recorded the audio wrongly"
> I am sending the following sip header when I send the call:
>
> INVITE sip:[email protected]:5060 SIP/2.0
> Via: SIP/2.0/UDP 10.65.1.5:5061;branch=z9hG4bK-26016-1-0
> From: sipp <sip:[email protected]:5061>;tag=1
> To: sut <sip:[email protected]:5060>
> Call-ID: [email protected]
> CSeq: 1 INVITE
> Contact: sip:[email protected]:5061
> Max-Forwards: 70
> Subject: Performance Test
> Content-Type: application/sdp
> Content-Length: 179
>
> v=0
> o=- 53655765 2353687637 IN IP4 10.65.1.5
> s=SIPp
> c=IN IP4 10.65.1.5
> t=0 0
> m=audio 5606 RTP/AVP 0 101
> a=sendrecv
> a=rtpmap:0 PCMU/8000
> a=rtpmap:101 telephone-event/8000
>
>
>
> The server that it is connecting to (Asterisk) replies that yes, PCMU is
> fine and sets the codec to g711u as I was expecting.
> Previously, I had captured the audio of an entire quick call with this
> command:
>
> tcpdump -T rtp -vvv -i eth1 src 10.65.240.94 and not port 5060 -w
> g711u.pcap
>
> The g711u.pcap file is what I am transmitting through the xml.
> I was calling sipp via the following command line:
>
> ./sipp -sf uac_pcap.xml -d 10000 10.65.1.5 -s 555 -l 1 -m 1 -mi 10.65.1.5
> -mp 5606 -i 10.65.1.5 -trace_err
>
>
> E-mail me off-list if you would like the g711u.pcap file or the xml layout
> I am utilizing for testing.
>
>
> Thanks in advance,
>
> Pete
>
>
>
>
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