03-31-2008 01:48 PM - edited 03-03-2019 09:20 PM
hi guys, I have 1-way audio..far end can't hear me....connection: US to UK, over public ip.....my end/US..cisco 2811....>cisco switch2900...>FW(ASA)...>internet, codec g711ulaw on both ends...UK side:internet....>soft switch (Veraz)...any ideas what may be causing this 1-way audio problem...I have a simple config on my 2811, no QoS/CoS yet........
The farend told me today that they do not see that we are sending rtp msgs...
Thanks in Advance,
Winston,
04-01-2008 08:38 AM
Have you tried changing the codec to g729, 711 requires a lot of overhead and bandwidth and typically run onnet in the office. I assume this is CME?
Is it between offices or between specific devices? Periodic?
04-01-2008 08:53 AM
I have not tried that yet, I will try....it is between offices..network setup...voice server (with dialogic t1 card)---->2811--->cisco 2900--->FW (ASA--->internet...
The farend is saying I am not sending rtp packet/msg..
note: I have the 2811 bandwidth for myself.it is just one test call i place over it.
thx
04-01-2008 08:55 AM
So the call set's up, rings the far end, the far end goes off hook, but no audio? This may be a stupid question, but are they answering via headset, speakerphone, or handset? Do you know that you have a known good phone?
04-01-2008 09:46 AM
yes they pickup the phone (a desk phone)no speaker or headset)and say hello, i hear them,but when I hello back to them they do not hear me.
04-01-2008 09:48 AM
is this system wide or just one phone from your end?
Meaning have you tried more than one phone
04-01-2008 09:54 AM
it is wide..have tried other phone set and other phone #'s...
How about the farend telling me they do not see I am sending rtp packets/msgs
thx
04-01-2008 10:04 AM
system wide issue, I need to think about this a little more.
can you post the telephony service config as well as the mgcp config?
04-01-2008 10:16 AM
voice server--->2811--->switch----fw--->internet.
*************
2811_UK-VOIP#sh run | s dial-peer
dial-peer voice 10 pots
incoming called-number .
direct-inward-dial
port 0/1/0:23
dial-peer voice 100 voip
destination-pattern .
progress_ind setup enable 3
session target ipv4:x.x.x.x
dtmf-relay rtp-nte h245-signal h245-alphanumeric
codec g711ulaw
no vad
2811_UK-VOIP#
******************
2811_UK-VOIP#sh ip ro
Gateway of last resort is 192.x.x.x to network 0.0.0.0
C 192.x.x.x/24 is directly connected, FastEthernet0/0
S* 0.0.0.0/0 [1/0] via 192.x.x.x
2811_UK-VOIP#..
no acl/no qos/cos
04-01-2008 01:17 PM
Thanks, I was able to figure out...it was an acl applied to fa0/0 causing the issues...thx for all your help
04-01-2008 01:18 PM
what did the ACL look like you had appiled?
That never crossed my mind to check.
04-01-2008 01:42 PM
It's usually a firewall (or ACL) or a double NAT when you get one way voice.
04-02-2008 11:57 AM
Something like this access-list 100 permit ip 192.0.0.0 0.255.255.255 host 192.x.x.x(going to fa0/0)...that seemed to be dropping rtp/udp packets
thx
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