IP Telephony and Phones

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Hello everyone, I want to ask a Cisco voice question.The customer originally had a Cisco 3945E router, and the customer feedback 78XX phone did not display the missed call. The query was found to be a bug in Cisco. We upgraded the version and have up...

shu shen by Level 1
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Dear Gent, I have a CME with many extensions. Recently I noted that when I configure a new phone or new extensions, these extensions or phones can't call extension number 300. While they can call 301, 311 and they can call all extensions except this ...