The best solution for you would be centrelized call processing model.
Also, keep in mind that the sites connected via public internet will need a VPN tunnel to the central site, and you will have no control over QoS for those sites. If feasible migrate those sites to leased lines, frame relay, or better yet migrate all sites to MPLS.
IN order to deploy successful VoIP you need to ensure your network netowrk is capable of hadling it.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...