Call completed but no audio vpn to vpn

Question

   I've installed IP Phones at some remote locations and they can call other IP Phones but when they call other phones that our on a VPN, the call says completed but there isn't any audio.
We have an ASA5520 and several ASA5505s with S2S VPNs. Call manager is located on the central site with ip phones on the remote ASAs. It seems to me that RTP is blocked somewhere. I have proper ACLs  on the ASAs allowing them to communicate directly with the other remote subnets.     

Answer 1

I don't know Linux, but I suggest;<BR><BR>
Clear the Cache '''''Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"'''''<BR><BR>
and<BR><BR>
Remove Cookies '''''Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"'''''<BR><BR>
If there is still a problem, try to
'''''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]'''''
===========================================
Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.
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