I have installed a MCK 6000 Gateway I and Extender with a Merlin Magix system.   This is working with an IP connection over a Cisco Aironet 1300 wireless bridge to a building 1/3 mile away.   The phones works great for our internal calls.  When I make a call outside the building there is an echo when I talk.  I can here the other person perfectly, but my voice echos.  After about a minute the echo goes away.  Are there any settings on the MCK to address this?   It is hard to find good documentation for this product.  I notice there are settings for voice compression and jitter, but I have no clue what to try.  Any thoughts?

Thanks!

I had this problem, Citel tech support indicated it is common when using Analog trunks, as opposed to a T1, to the outside world.

There is a setting for Echo Suppression, we set it to a different value. Unfortunately, I don't remember exactly the settings, and you must request the manual from Citel
http://www.citel.com/Support/Service_Support.asp#downloading