IP Telephony and Phones

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The question is:  does the same make/model router support a different number of phones if it is configured as simply a CUCME device versus configured as as SRST fallback device? Different Cisco documents seem to give different supported numbers - ind...

Hello Pros, I need to run a test call which needs to least at least 8 hours.  It looks like my SBC is terminâting the call after about 60 minutes by seding a Bye message. In CUCM the Max Call Duration is set to 720 mins but the call gets disconnected...

when we pick up the ip phone and try to call remote branch office number, it is always busy, there is no network connectivity problem, may i know the steps to analyze from voice gateway, cucm and sip trunk?   how to troubleshoot sip trunk problem? th...

Mary by Level 1
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I have two 7975G phones connected to an asterisk server.  The phones can make calls.  I was wondering if the phones support the RFC 3428 for Instant Messaging.  So if a remote user sends a text message to one of the 7975G phones, that the phone would...

wkunice by Level 1
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