I am using MGCP BTW CallManager and the Gateway with PRI. Yesterday we lost the CallManager and all phones registered with our SRST router (Backup). When CallManager went down all active calls dropped and when it came up(recovery) all active calls dropped again. Is it a normal behavior? Is there anyway that I can avoid the call drop?
What version of CCM are you using? Prior to CCM 3.1, both Layer 2 and Layer 3 signaling were passed to CCM by the gateway. If you lose Layer 2 on a PRI, you lose the D channel and therefore, all B channels. CCM 3.1 and later use the PRI backhaul method which terminates Layer 2 on the voice gateway. So, if the connection to CCM is lost, the D channel stays up and the call is preserved. Take a look at the following link.
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...