IP Telephony and Phones

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Hi,  Hopefully an easy question for someone. We've been shipped a 7821 IP phone but it's got the 3rd Party Call Control software on it. I'd read that I should be able to upgrade to enterprise using this: http://<phone_ip>/admin/upgrade?<schema>://<s...

Hi All, I'm doing a project for our London office. The weird thing is that i could not make any outgoing call. I checked the configurations of GW and CUCM, especially CSS and ISDN type. it seems all are good. I changed the calling number to E.164 or...

Yangjp715 by Level 2
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