i suggest you contact the Cisco TAC for specific trouble shooting. Problems related to a PRI and a gateway module can range from the Telco provider down to local wiring in your facility to configuration parameters on the gateway. Too many variables to try and troubleshoot for you on a BB.
As for the CSU, both the 3525 and 3540 GW module have built-in CSUs. Neither support LBO capabilities. If your GW sits a great distance from your local demarc, the addition of a CSU that supports LBO might be helpful. If you attempt this, remember that inter-CSU connections require you to flip the transmit and receive pairs. On a PRI, the TX pairs are 1&2 and the RX pairs are 4&5.
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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
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 ...