Can we monitor asterisk by using Nagios?

Asterisk Asterisk Support
1

Is it possible to monitor the Asterisk by Nagios?

2

Your question is not specific.
Which parameters / events do you need to monitor?

Nagios can do a lot for you, but for many parameters you would have to write scripts…

3

Almost Everything related to asterisk i.e live calling channel and free channel, PRI/SIP/VOIP registration status etc

4

You could try SNMP.

https://wiki.asterisk.org/wiki/display/AST/Simple+Network+Management+Protocol+(SNMP)+Support

https://wiki.asterisk.org/wiki/display/AST/Asterisk+MIB+Definitions?focusedCommentId=36802978#comment-36802978