On 2/13/18 1:32 PM, Eric Wieling wrote:
Could this gap in sequence numbers caused by a codec change generate
errors like the one below?
Yes, that is something I have seen before as well. The CPE changes
codec and forgets what sequence number it was on (or something like
that). The two ends might not notice any audio issues however. Having
said that, I have seen other PBXs that choke on something like this and
most often drop the call completely when this happens.
[2018-02-13 12:57:43] WARNING[4917][C-0004c2cb] codec_sangoma.c:
[526559][g722toulaw] Got Seq 15944 but expecting 10106 (time since
last read = 0ms), dropped 5838 packets
On 02/13/2018 01:24 PM, Andres wrote:
On 2/13/18 11:55 AM, Michael Maier wrote:
On 02/13/2018 at 08:41 AM Floimair Florian wrote:
No you're reading it wrong.
There are 188K received with no loss, and 16441K transmitted.
This doesn't make any sense to me, either. There can't be more packages
transmitted than received. It's the same codec in and out and it's been
running exactly the same time.
Lost and Percent (pct) are not calculated by counting packets. Those
are calculated from the sequence numbers in the RTP frame.
For example let's say you start the receiver (Asterisk) at Sequence
#1....then something happens and it jumps to sequence #5000. The
audio might be fine, but now the stats say 4998 packets were lost.
Why is there a bizarre sequence jump? Hard to say. I have seen it
because of bugs that eventually get fixed on the CPE, or even when
there is a change of codec (or re-invite) mid-call. I would not
worry too much about this unless you can reproduce it and can address
it properly at the CPE level. A packet capture will clearly confirm
what I am referring to here. Just look at every Sequence # in the RTP
flow and you will see the jump.
...........Receive......... .........Transmit..........
Count Lost Pct Jitter Count Lost Pct Jitter RTT....
188K 0 0 0.000 188K 16641K 8809 0.000 0.026
^^^^ ^^^^
There are 188K received and 188K transmitted. Pct is unknown -
what's Pct?
Still 8809 does not sound like a percentage to me 😉 so there is
something wrong with either the label or the value.
From what's in the code, you can see it's clearly a lost Packet
count not a percentage.
So I guess Pct in this case is short for "Packet".
With best regards
Florian Floimair
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Von: [email protected]
[mailto:[email protected]] Im Auftrag von
Michael Maier
Gesendet: Montag, 12. Februar 2018 17:46
An: [email protected]
Betreff: Re: [asterisk-users] What does pct mean?
Hi Carsten,
On 02/11/2018 at 07:46 PM Carsten Bock wrote:
Hi,
Lost percent (%)....
Are you sure? I'm seeing here:
...........Receive......... .........Transmit..........
Count Lost Pct Jitter Count Lost Pct Jitter RTT....
188K 0 0 0.000 188K 16641K 8809 0.000 0.026
=> This doesn't sound reliable to me: there are 188K packets and
16641K of them are lost?! The Pct value is fluctuating between
about 6009 and 9009.
Thanks,
Michael
Am 11.02.2018 19:27 schrieb "Michael Maier" <[email protected]>:
Hello,
could somebody please tell me the meaning of "Pct" as seen in
asterisk cli:
...........Receive......... .........Transmit..........
Count Lost Pct Jitter Count Lost Pct Jitter RTT....
Thanks,
Michael
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