Im defintely no expert here but it sounds like either a routing or firewall issue. first off, does the firewall have a port range open 16xxx-32xxx?
i ask because i had a simliar issue with integrating a legacy PBX with the IPT system. calls were traversing the Checkpoint firewall and could ring (signaling allowed) but voice itself was being blocked, hence port range had to be opened. this can be verifed by checking the firewall logs.
as for your second issue on not being able to make or receive. what exactly happens when you attempt to dial. fast busy, recording, dead air?
Lets make the picture clear here.... You said there are no VPN Tunnel, so why care about PIX.
My question is that how you connect between main site and branch site?? Through T1, Frame-relay, Ethernet, etc.....
Make sure you can ping from your main site to ip phone's ip address. Press "?" twice to see any increment at Tx and Rx after connect the call.
Let me say again, if your branches are not connecting through PIX, I will assume you have private line (T1, T3, frame-relay, ethernet, etc... any WAN) between main and branch. Make sure you have good routing between IP Phone VLAN.
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...