[asterisk-r2] hangup cause

[Agustina Berretta]

Hello!
I would like to know what does it mean:

chan_dahdi.c: ast cause 20 resulted in openr2 cause 6/Normal Clearing

What kind of hangup cause is it? 20 from ISDN?

*Cause No. 20 - subscriber absent.*
This cause value is used when a mobile station has logged off. Radio
contact is not obtained with a mobile station or if a personal
telecommunication user is temporarily not addressable at any user-network
interface.

?

Thanks a lot!!!
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