The Nagios plugin merely initiates an OhPhone command to start the call, specifying gatekeeper to register to, username to register with and target number:
e.g. ohphone --listenport 1730 --gatekeeper 143.23.1.3 --user ohphone 0030123456
After the command is triggered, the plugin waits for the text output of OhPhone, looking for strings to confirm the various stages of the call, e.g.
Here is the OhPhone reply for a successful call:
Listening interfaces : ALL:1750
Gatekeeper set: gnugk@grnet.gr
ohphone is calling host 0030298231
Command ? Ringing phone for "0030298231" ...
Call with "Cisco IPVC-3510-MCU: Conference '0030298231'" established.
Here is the OhPhone reply for a call to an unreachable number:
Listening interfaces : ALL:1750
Gatekeeper set: gnugk@grnet.gr
ohphone is calling host 2860000
Command ? Call with "2860000" completed
Here is the OhPhone reply for a call to an unreachable number:
Listening interfaces : ALL:1750
Error registering with gatekeeper at "143.23.1.3"
OhPhone ended.
A list of the important OhPhone replies follows:
- "Gatekeeper set: gnugk@grnet.gr" to confirm gatekeeper registration,
- "Ringing phone for 0030123456 ..." to confirm dialplan reachability
- "0030123456 is busy" again, confirms dialplan reachability
- "Call with 0030123456 established." to confirm actual call establishment
Note that the message "ohphone is calling host 0030123456" is merely informing us
that OhPhone is ready to start the call, and does not indicate that gatekeeper LRQs have returned a known and reachable prefix.
If a "Ringing ..." or "Call with..." or "was busy" message is reached, the call is considered successful.
In any case, when the message "Call with "0030123456" completed" is reached, the call attempt has ended.
and the plugin terminates the ohphone command by sending an X command for exit.
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