How to solve one way audio problem

i use cm 4.1(3) and i have one way audio problem ,i guess cause of NAT or firewall so i open all port that access-list block but i still have problem . i think nat is the problem .So which way does i have to fix this out
pls tell me how

Take a look at the following link.
Troubleshooting One Way Voice Issues
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a008009484b.shtml
Hope this helps. If so, please rate the post.
Brandon

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Bizarre! One-Way Audio all of a sudden.

I have a 7940 connected to an ASA5505 version 9.1(4) (originally connected on a DOCSIS 3 cable modem) which has a site-to-site VPN tunnel that terminates on a Cisco 1841 and CCM 6.1 it's been working perfectly forever.
Recently I switched to a fibre optic connection (instead of the cable modem) and now I have one-way audio. Everything else works perfectly (access to CIFS/SMB file shares, FTP, telnet, SSH) though the tunnel and it behaves as it always did except a lot faster on fibre (80 ms ping down to 6 ms). The fibre ISP delivers various services (IPTV, Internet, etc.) via different VLANs so their Internet vlan is 802.1q tag 35.
So the configuration was:
interface Ethernet0/0
switchport access vlan 6
interface Vlan6
nameif outside
security-level 0
ip address dhcp setroute
and now it is:
interface Ethernet0/0
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switchport mode trunk
interface Vlan35
mac-address 109f.xxxx.xxxx
nameif outside
security-level 0
ip address dhcp setroute
and now I have one-way audio (I can hear the other end but they can't hear me). Everything else works perfectly (e.g. call setup, dialling touch tones, etc.). As the change is so subtle (just the outside interface) I am baffled and don't know where to begin troubleshooting this. In fact when it happened I was sure it was just a problem with the handset cord but I can "hear" my voice echoing back a bit. I'm keeping the DOCSIS 3 cable Internet until I get this sorted out but of course now paying for two Internet connections so don't want to have to do that any longer than I have to.
Any insight or suggestions on how to proceed very much appreciated.

Well I sort of found the problem but not yet the solution. I had to switch to an ASA5505 with the Security Plus license to get the trunk I needed. If I take out the trunk (so the same configuration will work on an ASA with the base license) and get raw Internet connectivity another way (so I don't need the trunk) I have one ASA that works and one that doesn't.
They both are running 9.1(4) and have identical configurations (copied to both with TFTP).
The ASA with the Security Plus license has one way audio, the base license ASA does not.
I also uploaded both configurations to a unix box and did a diff:
< switchport trunk allowed vlan 33-36
< switchport mode trunk
> switchport access vlan 6
39a39,43
> interface Vlan6
> nameif outside
> security-level 0
> ip address dhcp setroute
> !
46,51d49
< interface Vlan35
< mac-address 109f.a943.f36a
< nameif outside
< security-level 0
< ip address dhcp setroute
< !
86d83
< mtu dmz 1500
88c85
< no failover
> mtu dmz 1500
So it's a bug, revealed by the security plus license as they have identical software and identical configurations and act differently. Not sure how to work around it yet as I have to use another router temporarily to not require the trunk and the performance is less than stellar with that in the mix. I also upgraded 9.1(4) to 9.2(1) on both - no joy, still the same.

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I am wondering if anyone has seen this before. I have the latest version of Anyconnect for the IPhone and Jabber app, running on the newest version of CUCM 8.6 and Jabber 8.6.
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I've also verified that useing the same VPN profile I can make 2 way audio calls out the SIP trunk from a softphone running on windows.
Anyone have any ideas what could be the problem?
Thanks.

Hi,
try to disable early media on 180 under sip profile settings for jabber client.
HTH
Anas
please rate if itnis helpful
Sent from Cisco Technical Support Android App

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I have 2 Cisco 1941 routers with a standard IPSec tunnel between them. Data works fine, but VoIP is encountering a one way audio issue where the remote site calling cannot be heard but they can hear me. This seems to match what I'm seeing in encaps and decaps. The quesion I'm having is why would the remote site be encapsulating all packets but the office router isn't decaping these audio packets. I isolated one phone specifically so that's why the SA is for only 1 host.
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   remote ident (addr/mask/prot/port): (10.90.91.6/255.255.255.255/0/0)
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        IV size: 8 bytes
        replay detection support: Y
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REMOTE ROUTER
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    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
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     local crypto endpt.: IP_REMOTE, remote crypto endpt.: IP_OFFICE
     path mtu 1500, ip mtu 1500, ip mtu idb GigabitEthernet0/0
     current outbound spi: 0xEA4A3FF9(3930734585)
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Thanks Michal.
1) I have taken these buffer captures. The capture associated with "outside" is short when compared with the number of packets from the "inside" capture in the amount that is most likely associated with the call we placed.
2) Not NAT at all.
3) No CBAC or ZBF, unless some default that I'm not aware of. Not sure off hand how to disable those.
I did get this case through to TAC but after 3 hours we are left at comparing the capture buffers.

Call Pickup - Users experience One Way Audio when using Call Pickup Orbit to pickup internal calls with internal Lync 2010 Callers

Hi
Noticed an issue where when using Call Park Function with users you receive one way audio when answering the call
The scenario is
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same for user who has picked up call
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In Lync Tracing logs a SIP/2.0 481 Call Leg/Transaction Does Not Exist error is returned
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http://technet.microsoft.com/en-us/lync/dn146015.aspx
If the issue persists, please enable logging tool on Front end and Mediation server to get trace for troubleshooting.
http://blog.schertz.name/2011/06/using-the-lync-logging-tool/
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make
sure that you completely understand the risk before retrieving any suggestions from the above link.
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I can make calls, but when the other person picks up, they can hear me but I can't hear them. I am connected to my Linksys WRT54G router and have Optimum Online as my internet connection. Is there any reason why this would be happening? I have tried the phone at another location and it works fine.

One way audio in most cases are routing issues.
Can you check if rtp packets are reaching both ways(There is no firewall blocking rtp traffic )
In cisco phones you could check that by pressing the "?" button.

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My video project has corrupted audio suddenly. I've read about other audio problems when exporting, but all I did was save the project while editing, no export. I have the prefs set to extract audio at pasteover, which I've done a lot of for this 2-camera wedding shoot. I also have the second audio track occasionally used for background music. All three tracks (video, audio 1, audio 2) on the timeline have corrupted audio for the entire length of the project. It sounds like a helicopter whirr was added, it's very choppy. Also, both cpus are maxxed out and the process monitor shows iMovie utilizing 180%+ consistently. When iMovie isn't running, it's in the single digits. As soon as I load iMovie the cpus max out. This hasn't happened the whole project, just recently. So what changed? I don't know. I've been doing the same thing the whole time, the pasteovers, the add titles, the add background track, saving the project every couple of minutes. Each time I've saved, it looks like it's listing off different files or clips, not just the changed clips. I've tried deleting the QT movie it created in the cache and let it recreate to see if that would help, but it didn't. Would deleting the files in the waveform cache help? I've got about 30 hours into this project already and would love to resurrect this audio if possible. Either that or it's Jim Beam and call it a day. I thought this was non-destructive editing, but apparently that's just the originals? That doesn't help much when the whole project audio goes in the toilet and I'm looking at redoing this whole project. Anyone who can fix this is getting a big ol' sloppy kiss on the mouth and an iTunes gift certificate.

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To access the movie, Control-click on the project icon and choose "Show Package Contents".
2. Try exporting ONLY the project audio to an AIFF file, then import THAT back into the project and replace the audio you have. That will "flatten" the audio and make it much easier to play. (To be safe, on a copy of the project.)
Or if you have QuickTime Pro, you might try extracting all the audio from the Timeline movie.
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If you get this solved, please say how.
Oh, and if you haven't updated to iMovie 7.1, you might try that. There were improvements in handling multiple audio tracks, I read somewhere.
BTW, it's usually not a good idea to change things inside the project package. iMovie can get pretty confused. The Timeline movie is replaced each time we save, so that's not a big deal.
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