I have problem with echo on my cucm system
I have call manager 8.0 with a 2 E1 pstn connectivity (vwic2-2mft)
when my ip phone users calls pstn , the hear their voice (echo)
i played with variuos items like input gain and output attenu and also erl but not effective
i want to know how can i eliminate the echo and make everyone free!!
please hint me a solution by the eay i read many cisco documents but nothing happen!