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at the end the router reports call statistics:<br>
P: PS=978, OS=156480, PR=980, OR=156800, PL=0, JI=0, LA=0<br>
PS = packets sent<br>
PR = packets received<br>
978 is close enough to 980. this means all RTP packets made it through
the network between the endpoints.<br>
980 packets * 20msec/packet = 19,600msec of audio.<br>
<br>
Time from sendrecv to recvonly = 03:51:40.645 - 03:52:00.227 = 19.6
seconds (approximately).<br>
19.6 seconds connected and 19.6 seconds of RTP traffic. Thus audio was
successfully established and packets were sent and received
successfully for the duration of the connection.<br>
<br>
Router responded correctly and offered its ip address to receive RTP
stream. the mgcp call agent (cm?) sent instruction to establish
bidirectional audio full 15 seconds later. <b>Need to see what took
the
call agent(cm?) so long to obtain the media ip/port from the other
endpoint.</b><br>
<br>
debugs with comments:<br>
//create connection to setup new call<br>
Jul 10 03:51:25.534 CST: MGCP Packet received from 10.1.1.10:2427---><br>
CRCX 89768<br>
<br>
//router provides ip & port for RTP stream:<br>
Jul 10 03:51:25.550 CST: MGCP Packet sent to 10.1.1.10:2427---><br>
200 89768 OK<br>
I: 6<br>
<br>
// router receives instruction to change audio mode to sendrecv. this
is usually 2 way audio<br>
Jul 10 03:51:40.645 CST: MGCP Packet received from 10.1.1.10:2427---><br>
MDCX 89773 <a class="moz-txt-link-abbreviated" href="mailto:AALN/S0/SU1/3@MC003776.mcenery.local">AALN/S0/SU1/3@MC003776.mcenery.local</a> MGCP 0.1<br>
C: A00000000200d51c000000F5<br>
I: 6<br>
X: 0<br>
L: p:20, a:PCMU, s:off, t:b8<br>
M: sendrecv<br>
R: L/hu, D/[0-9ABCD*#]<br>
S: <br>
Q: process,loop<br>
<br>
v=0<br>
o=- 6 0 IN EPN <a class="moz-txt-link-abbreviated" href="mailto:AALN/S0/SU1/3@MC003776.mcenery.local">AALN/S0/SU1/3@MC003776.mcenery.local</a><br>
s=Cisco SDP 0<br>
t=0 0<br>
m=audio 18840 RTP/AVP 0<br>
c=IN IP4 172.20.113.10<br>
<---<br>
<br>
//router receives instruction to stop transmitting audio<br>
Jul 10 03:52:00.227 CST: MGCP Packet received from 10.1.1.10:2427---><br>
MDCX 89775 <a class="moz-txt-link-abbreviated" href="mailto:AALN/S0/SU1/3@MC003776.mcenery.local">AALN/S0/SU1/3@MC003776.mcenery.local</a> MGCP 0.1<br>
C: A00000000200d51c000000F5<br>
I: 6<br>
X: 0<br>
M: recvonly<br>
<br>
// router reports call statistics:<br>
Jul 10 03:52:00.287 CST: MGCP Packet sent to 10.1.1.10:2427---><br>
250 89776 OK<br>
P: PS=978, OS=156480, PR=980, OR=156800, PL=0, JI=0, LA=0<br>
<br>
<br>
<br>
<br>
<br>
<br>
v=0<br>
c=IN IP4 172.20.115.254<br>
m=audio 17344 RTP/AVP 0 100<br>
<br>
<br>
<br>
/Wes<br>
<br>
<br>
Jonathan Charles wrote:
<blockquote
cite="mid:5d093f9a0807091401u640ddcb2pd0fd0c4329429be5@mail.gmail.com"
type="cite">
<pre wrap="">Here you go... no obvious errors...
Jonathan
On Wed, Jul 9, 2008 at 2:42 PM, Wes Sisk <a class="moz-txt-link-rfc2396E" href="mailto:wsisk@cisco.com"><wsisk@cisco.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">yep
Jonathan Charles wrote:
</pre>
<blockquote type="cite">
<pre wrap="">The MGCP packet debug?
J
On Wed, Jul 9, 2008 at 1:02 PM, Wes Sisk <a class="moz-txt-link-rfc2396E" href="mailto:wsisk@cisco.com"><wsisk@cisco.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">can you share the debug (blank out the actual phone numbers) with debug
datetime msec?
/wes
Jonathan Charles wrote:
</pre>
<blockquote type="cite">
<pre wrap="">We have a remote site via a VPN tunnel (over MPLS), and we are seeing
significant audio cut through delays.
We did a debug mgcp packet and saw no retries.
We can also see the problem when PSTN callers are placed on hold and
retrieved.
Delay lasts between 3 to 4 seconds...
Any ideas?
MGCP config is the default (no special packages enabled/disabled)...
Jonathan
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</pre>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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