I have CM ver 4.1(3) with a gatekeeper trunk connecting it to a PGW system for PSTN interface.
when placing calls from an IP Phone to PSTN sometimes (randomly) the call last for only 26 secs, and when I checked the CDR file of the call I found that the disconnect reason is 47 (Resource unavailable, unspecified) and it is the same value for dest and orig. what do u think the reason could be for this issue??
When a Cisco IP Phone is unplugged, no immediate, physical indication goes to the Cisco CallManager.
The Cisco CallManager relies upon a transmission control protocol (TCP)-based keepalive signaling mechanism to detect when a Cisco IP Phone becomes disconnected.
Each Cisco IP Phone sends a keepalive message to the Cisco CallManager at the configured keepalive interval (default=30 seconds), and the Cisco CallManager responds with an acknowledgement. Both parties then know that the other is functioning properly. When a Cisco IP Phone is unplugged, it fails to
send this keepalive message. The Cisco CallManager waits twice the keepalive interval from the time of the last keepalive message before assuming that the Cisco IP Phone no longer functions.
Now the implication to billing is that, when a Cisco IP Phone is unplugged, the duration of the call that is reflected in the CDR can be up to twice the keepalive interval plus the TCP retry timers longer than the actual speech-time that the user experienced. This worst-case value assumes that the other party did not hang up.
Identify calls that fail in this manner by a cause value of 41 (Temporary Failure). This cause value can possibly occur in other circumstances because external devices such as gateways can also generate this cause value.
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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
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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 ...