I also was not able to debug the command using cmk.
When I try to run:
cmk -vn --checks=check_oxesiptrunkstatus OmniPCX-Office
I get:
Check_MK version 1.6.0p10
Unknown plugin file check_oxesiptrunkstatus
Unknown plugin file check_oxesiptrunkstatus
+ FETCHING DATA
[snmp] Execute data source
[piggyback] Execute data source
No piggyback files for 'OmniPCX-Office'. Skip processing.
No piggyback files for '192.168.2.100'. Skip processing.
[snmp] Execute data source
+ EXECUTING INVENTORY PLUGINS
Plugins: inv_if snmp_info snmp_os
OK - [snmp] Success, execution time 0.1 sec | execution_time=0.126 user_time=0.080 system_time=0.000 children_user_time=0.000 children_system_time=0.000 cmk_time_snmp=0.039 cmk_time_agent=0.001
Even though I can fin it in cmk -L:
$ cmk -L|grep oxesip
check_oxesiptrunkstatus active Check OXE SIP Trunk Status