Ive got a problem on a site with echo. The customer is telling me that they are getting echo on internal (IP to IP) and external calls (external destinations to the PSTN and to a Philips system via a second gateway). Has anyone come across this before and is there a fix?
Re: Echo on IP to IP and IP to PSTN calls from 7940's
Are the echo cancellers enabled and set for max coverage on the gateway voice ports?
You probably will need to upgrade your IOS to get the enhanced 64ms tail capture echo cancellers. If you have enough memory IP Voice 12.4.3a has been good in 2620XMs. You need 122-15ZJ or 12.3T minimum for the enhanced cancellers.
As for IP phone to IP phone echo, you may have a bad phone, but I have only seen one instance of that in 3 years. If the canceller is bad in a phone, the party on the other end will hear the echo.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.