[Freeswitch-users] Choppy voive in conference from fritzbox to freeswitch (ptime:30 msecs)

Thu Aug 20 06:35:46 PDT 2009

Hello,

when calling from Fritzbox to a Snom Phone , sound is fine. But when
calling an internal Freeswitch number (conference, mailbox) i hear a
very choppy voice coming from the fritzbox side. I think it may have to
do with the ptime 20msec/30msec.

Example: When calling from the fritzbox to a voicemail then the
annoucement from Freeswitch is choppy (too slow with interrups), but the
recorded message is fine.

Did anybody experience the same problem?

Best regards
Peter

Here are some SIP messages:
U 112.xxx.xx.xxx:5060 -> 182.xxx.xx.xxx:5060
INVITE sip:0123456 at my.domain SIP/2.0.
Via: SIP/2.0/UDP 112.xxx.xx.xxx:5060;branch=z9hG4bK22AF53A2ECD8BEAD.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 55 INVITE.
Contact:
<sip:02xxxxxxxxx at 112.xxx.xx.xxx;uniq=2006157A4333690041A4B78E67BC3>.
Max-Forwards: 70.
Expires: 120.
User-Agent: AVM FRITZ!Box Fon WLAN 7170 29.04.70 (Feb 18 2009).
Supported: 100rel,replaces,timer.
Allow-Events: telephone-event,refer.
Allow:
INVITE,ACK,OPTIONS,CANCEL,BYE,UPDATE,PRACK,INFO,SUBSCRIBE,NOTIFY,REFER,MESSAGE,PUBLISH.
Content-Type: application/sdp.
Accept: application/sdp, multipart/mixed.
Accept-Encoding: identity.
Content-Length:   359.
.
v=0.
o=user 16423733 16423733 IN IP4 112.xxx.xx.xxx.
s=call.
c=IN IP4 112.xxx.xx.xxx.
t=0 0.
m=audio 7078 RTP/AVP 8 0 2 102 100 99 97 101.
a=sendrecv.
a=rtpmap:2 G726-32/8000.
a=rtpmap:102 G726-32/8000.
a=rtpmap:100 G726-40/8000.
a=rtpmap:99 G726-24/8000.
a=rtpmap:97 iLBC/8000.
a=fmtp:97.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-11.
a=rtcp:7079.

#
U 182.xxx.xx.xxx:5060 -> 112.xxx.xx.xxx:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 112.xxx.xx.xxx:5060;branch=z9hG4bK22AF53A2ECD8BEAD.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 55 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-14552.
Content-Length: 0.
.

#
U 182.xxx.xx.xxx:5060 -> 112.xxx.xx.xxx:5060
SIP/2.0 407 Proxy Authentication Required.
Via: SIP/2.0/UDP 112.xxx.xx.xxx:5060;branch=z9hG4bK22AF53A2ECD8BEAD.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>;tag=7t1e8BQg5B7yK.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 55 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-14552.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE,
NOTIFY, REFER, UPDATE, REGISTER, INFO.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, refer.
Proxy-Authenticate: Digest realm="my.domain",
nonce="900b46a0-8d88-11de-a6a1-098738f35adb", algorithm=MD5, qop="auth".
Content-Length: 0.
.

#
U 112.xxx.xx.xxx:5060 -> 182.xxx.xx.xxx:5060
ACK sip:0123456 at my.domain SIP/2.0.
Via: SIP/2.0/UDP 112.xxx.xx.xxx:5060;branch=z9hG4bK22AF53A2ECD8BEAD.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>;tag=7t1e8BQg5B7yK.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 55 ACK.
User-Agent: AVM FRITZ!Box Fon WLAN 7170 29.04.70 (Feb 18 2009).
Content-Length: 0.
.

#
U 112.xxx.xx.xxx:5060 -> 182.xxx.xx.xxx:5060
INVITE sip:0123456 at my.domain SIP/2.0.
Via: SIP/2.0/UDP 112.xxx.xx.xxx:5060;branch=z9hG4bK7CB99A256497FBB0.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 56 INVITE.
Contact:
<sip:02xxxxxxxxx at 112.xxx.xx.xxx;uniq=2006157A4333690041A4B78E67BC3>.
Proxy-Authorization: Digest username="02xxxxxxxxx", realm="my.domain",
nonce="900b46a0-8d88-11de-a6a1-098738f35adb", uri="sip:0123456 at my.domain",
 response="276b44e261c13bd17218adff1150f414", algorithm=MD5,
cnonce="CADBE5D624516E8A", qop=auth, nc=00000001.
Max-Forwards: 70.
Expires: 120.
User-Agent: AVM FRITZ!Box Fon WLAN 7170 29.04.70 (Feb 18 2009).
Supported: 100rel,replaces,timer.
Allow-Events: telephone-event,refer.
Allow:
INVITE,ACK,OPTIONS,CANCEL,BYE,UPDATE,PRACK,INFO,SUBSCRIBE,NOTIFY,REFER,MESSAGE,PUBLISH.
Content-Type: application/sdp.
Accept: application/sdp, multipart/mixed.
Accept-Encoding: identity.
Content-Length:   359.
.
v=0.
o=user 16423733 16423733 IN IP4 112.xxx.xx.xxx.
s=call.
c=IN IP4 112.xxx.xx.xxx.
t=0 0.
m=audio 7078 RTP/AVP 8 0 2 102 100 99 97 101.
a=sendrecv.
a=rtpmap:2 G726-32/8000.
a=rtpmap:102 G726-32/8000.
a=rtpmap:100 G726-40/8000.
a=rtpmap:99 G726-24/8000.
a=rtpmap:97 iLBC/8000.
a=fmtp:97 mode=30.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-11.
a=rtcp:7079.

#
U 182.xxx.xx.xxx:5060 -> 112.xxx.xx.xxx:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 112.xxx.xx.xxx:5060;branch=z9hG4bK7CB99A256497FBB0.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 56 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-14552.
Content-Length: 0.
.

#
U 182.xxx.xx.xxx:5060 -> 112.xxx.xx.xxx:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 112.xxx.xx.xxx:5060;branch=z9hG4bK7CB99A256497FBB0.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>;tag=83t7967K2mXHF.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 56 INVITE.
Contact: <sip:0123456 at 182.xxx.xx.xxx:5060;transport=udp>.
User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-14552.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE,
NOTIFY, REFER, UPDATE, REGISTER, INFO.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 249.
.
v=0.
o=FreeSWITCH 1250746184 1250746185 IN IP4 182.xxx.xx.xxx.
s=FreeSWITCH.
c=IN IP4 182.xxx.xx.xxx.
t=0 0.
m=audio 26670 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=silenceSupp:off - - - -.
a=ptime:20.

#
U 112.xxx.xx.xxx:5060 -> 182.xxx.xx.xxx:5060
ACK sip:0123456 at 182.xxx.xx.xxx:5060;transport=udp SIP/2.0.
Via: SIP/2.0/udp 112.xxx.xx.xxx:5060;branch=z9hG4bK39E0B6E237E408FC.
From: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
To: <sip:0123456 at my.domain>;tag=83t7967K2mXHF.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 56 ACK.
Contact:
<sip:02xxxxxxxxx at 112.xxx.xx.xxx;uniq=2006157A4333690041A4B78E67BC3>.
Max-Forwards: 70.
User-Agent: AVM FRITZ!Box Fon WLAN 7170 29.04.70 (Feb 18 2009).
Content-Length: 0.
.

#
U 182.xxx.xx.xxx:5060 -> 112.xxx.xx.xxx:5060
INVITE sip:02xxxxxxxxx at 112.xxx.xx.xxx;uniq=2006157A4333690041A4B78E67BC3
SIP/2.0.
Via: SIP/2.0/UDP 182.xxx.xx.xxx;rport;branch=z9hG4bK7rpNeaN67y9ta.
Max-Forwards: 70.
From: <sip:0123456 at my.domain>;tag=83t7967K2mXHF.
To: <sip:02xxxxxxxxx at my.domain>;tag=9A806878F0882CFC.
Call-ID: 3125316C8A2A13B8 at 112.xxx.xx.xxx.
CSeq: 119268091 INVITE.
Contact: <sip:0123456 at 182.xxx.xx.xxx:5060;transport=udp>.
User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-14552.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE,
NOTIFY, REFER, UPDATE, REGISTER, INFO.
Supported: timer, precondition, path, replaces.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 249.
.
v=0.
o=FreeSWITCH 1250746184 1250746186 IN IP4 182.xxx.xx.xxx.
s=FreeSWITCH.
c=IN IP4 182.xxx.xx.xxx.
t=0 0.
m=audio 26670 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=silenceSupp:off - - - -.
a=ptime:30.