This is a new setup for testing. I have a call manager and 1 phone (phone A) on the same subnet and 1 phone (phone B) on a different subnet which is behind a PIX 510. The call from phone A to phone B completes normally. A call from phone B to phone A initiates but never completes.
The sniffer trace indicates that both phones send a TCP SYN packet to the IP address of their respective default routers once the number has been dialed. The reply is a reset (RST) packet. In the case of phone B it appears that the PIX sends a reset and drops the session. There are multiple attempts from the call manager to phone B which are never received and the call is not completed.
Is it normal for the 7900 series phone to attempt a connection to the "default router" ?
Is there a way to configure the phone not to send a TCP SYN to the router?
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...