The FXO Power Failure feature is a hardware feature that is built into the FXO cards. The feature allows connectivity to an analog phone that is patched into the right pair of wires to be activated by a relay if power to the router that contains the NM-HDA fails.
If router power drops and the NM-HDA goes down with the router, then there is a relay on the NM-HDA that connects the FXO (CO trunk) to a "red phone" (an otherwise unused wire pair in the cable) to enable emergency calls to the PSTN during a power outage. This is known as FXO power-fail switchover. The NM-HDA is the only one of FXO HW cards that has this capability.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...