I am connecting a 1751 to a Definity G3. On the PBX side I do not have a CSU/DSU. On the router side I have a MFT-T1 card which obviously has a built in CSU/DSU. I have done a few integrations to a Definity and each time I have had a CSU/DSU on the PBX side. When I do a "debug isdn q912" I see my SABME TX transmits and on the RX side I get "BAD FRAMES". My opinion is that the missing CSU/DSU is causing my problem. A few people I have talked to told me it was a clocking issue (this G3 cannot provide clocking so I have configured the router to do the clocking) and not a CSU/DSU issue. It is my understanding that if you have a CSU/DSU on one side you need it on the other side. If anyone has any thoughts please comment.
As I understand it, and I could be wrong, the CSU/DSU converts the signal from serial to 1-pair TDM. Essentially, if the port on the Definity is RJ-45, then you will not need a CSU/DSU, because RJ-45 will not support a serial connection. The "BAD FRAMES" could well indicate a clocking issue, or a linecode/framing config mismatch. Unfortunately, without a CSU/DSU you don't get the nice color-coded alarms. I have connected a voice gateway with a G3 (in my case it was a AS5300 gateway) and other than the PRI card, no special hardware was needed on the G3 side.
Thanks for the reply. It turns out the the 5ess switchtype does not support the Cisco Gateway being the Network Side (isdn protocol emulate network) I had to change to primary-ni on both sides and have the Gateway be the network side. Once I did that I got multiple frames established and everything came up on both sides. I am still having a little trouble. If I have debug isdn q931 and I make a call I do not see the q931 messages (even if I do a csim start number which rules out CallManager issues) I do not see the q931 messages. I have never configured a router to be the Network side so I am not sure if the q931 messages are different. All I see are some status_enq messages every now and again. Any ideas.
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...