I got one side of call-leg from your description, but what is complete e2e call flow?
++ From the packet capture it looks like protocol based T38, but We dont support protocol based t38 in SCCP, only NSE based T38 swicthover is supported in sccp. If by anyhance CCM is talking sccp to far end device which is connected to fax machine, then you would see 488 media error.
++ Or other suspect is MTP invoked in the call flow, which is not configured for codec passthrough.
Please check the above two possibilities, if not please collect the detailed CCM traces with the calling details and pass it to us.
The problem is solved "by itself", but I see that something changed from the operator side. I think that they changed something and they rolled back now and is working again so it was not a problem on the Cisco network side.
Thank you for the ATA information, will be useful for future troubleshooting!
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 ...
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