Hi Guys, I need some help. Here is the setup I have, I have a 2901 router with a PRI vWic running CME 8. What I am trying to do is pass fax calls through a sip trunk to Fax for Asterisk. This however has proved much more problematic that I thought. Small (1 to 3 page) faxes complete pretty well, about 90% of the time, anything more than 3 pages and it just doesnt work. I have tried sip over TCP and UDP, but of course IOS only supports T38 over udp... Anyway, when a call comes through it passes it off to asterisk, brings up t38 and starts sending, after a couple of pages it falls back from 14.4kbps to 12kbps and if the fax is long enough it will eventually fall back to 9600... The fax call is dropped though befor it finishes... I turned ECM off (per the cisco docs) to see if that helped any, and it really did not. But I do get a different error with it off. With ECM on, the error when the call dies is T2 Timeout, however with ECM off, the error is Loss of HS Sync. I have done a packet capture and really dont see any issues that are obvious enough to stick out to me, then again I am not really fimiliar enough with this to know what to look for. The one thing I did notice is in the packet capture, the last page sent before the call dies has a tag (added by wireshark) saying T4 data fragment. None of the other pages have that tag on them, but all of the packets on the last page to go through have that tag (I guess because the call is getting dropped.) But I am at a complete loss as to what to look at next. Looking at the debug output on the router nothing sticks out as an obvious issue other than the call going away... I just cannot figure out what is killing the call.
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
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setting the clocks forward 1 hour from standard time during the summer
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