[Opalvoip-devel] Delayed audio on outgoing calls

[Joachim B. <jo...@st...>]

Hi,

we are using Opal 3.6.7 and PTlib 2.6.6 on Linux and experiencing delay
of several seconds with audio received from outgoing calls established
through Broadworks SIP gateways. Outgoing audio (Opal -> SIP Phone) is
not delayed, only the incoming audio.

The log contains lots of informations about dropped packages, and a
high jitter value though I'm not using Opal's jitter buffer.
----- snip -----
2010/06/17 17:11:29.894 RTP     Session 1, dropped 1 packet(s) at 16653, 
ssrc=1888397552
2010/06/17 17:11:29.930 RTP     Session 1, dropped 1 packet(s) at 61195, 
ssrc=529169165
2010/06/17 17:11:30.014 RTP     Session 1, dropped 1 packet(s) at 16660, 
ssrc=1888397552
2010/06/17 17:11:30.290 RTP     Session 1, dropped 1 packet(s) at 61214, 
ssrc=529169165
2010/06/17 17:11:30.374 RTP     Session 1, dropped 1 packet(s) at 16679, 
ssrc=1888397552
2010/06/17 17:11:30.643 RTP     Session 1, transmit statistics: 
packets=4501 octets=720160 avgTime=20 maxTime=22 minTime=18
2010/06/17 17:11:30.650 RTP     Session 1, dropped 1 packet(s) at 61233, 
ssrc=529169165
2010/06/17 17:11:30.773 RTP     Session 1, receive statistics: 
packets=16360 octets=2617600 lost=476 tooLate=0 order=0 avgTime=19 
maxTime=37 minTime=3 jitter=122 maxJitter=33554431
2010/06/17 17:11:30.853 RTP     Session 1, dropped 1 packet(s) at 16704, 
ssrc=1888397552
2010/06/17 17:11:30.972 RTP     Session 1, SentSenderReport: 
ssrc=4161516124 ntp=3485761890.4177173142 rtp=0 psent=16367 osent=2618720
2010/06/17 17:11:30.972 RTP     Session 1, SentReceiverReport: 
ssrc=1888397552 fraction=20 lost=477 last_seq=16512 jitter=547 lsr=0 dlsr=0
----- snip -----
2010/06/17 17:12:18.950 RTP     Session 1, final statistics:
     packetsSent       = 6903
     octetsSent        = 1104480
     averageSendTime   = 20
     maximumSendTime   = 22
     minimumSendTime   = 18
     packetsReceived   = 6895
     octetsReceived    = 1103200
     packetsLost       = 201
     packetsTooLate    = 0
     packetOverruns    = 0
     packetsOutOfOrder = 0
     averageReceiveTime= 19
     maximumReceiveTime= 40
     minimumReceiveTime= 0
     averageJitter     = 5163175
     maximumJitter     = 33554431
----- snip -----

I'm a bit lost, is there anything I need to setup differently inside
Opal or does anybody know about the Broadworks switches and an option
I might need to tweak there?

Thanks in advance,
   Joachim Bauch