Dialing and UNHANDLED EVENT

Hello!

I'm trying to make outbound calls using following code.

All works just fine but I got

bayonne: UNHANDLED EVENT: 2161

in /var/log/messages right after "dial" command execution.

Bayonne 1.2.11 + small patches on RH-9, globalcall driver,
Dialogic D300-SC board with ISDN PRI network connection.

Where can I found event description and it's possible impact?

---------------------------code---------
dial %TO maxTime=30
goto ::playgreating

^timeout
    slog {Timeout}
    exit

^error
    slog {Error: } %session.error
    exit

^busy
    slog {Busy}
    exit

^hangup
    slog {Hangup}
    exit
---------------------------code---------

-- 
Dmitry