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Ear and Mouth with 4 port network interface module was acceptable only with some countries?
How many ports used for calls and what about signaling? Is it similar to ISDN BRI?
If E & M port is inserted with voice gateway what is the dependency of DS...
Thank you for sharing such useful info.
Can you help me understand what is the default value for preference ?
An output of the show trunk group command only gives me preference DEFAULT.
Right now , my CME IOS is 15.3.3(M) and CME 10.0 .. I have cisco 7841 SIP phones. I think i need to upgrade IOS to 15.4.1T ..Right?7841 phone firmware also has to upload to flash ? or it will be there default ?
