[asterisk-users] where can I found documentation about channel drivers

[Klaus Darilion]

Hi!

I am looking for authoritative documentation about channel driver 
options, e.g. 'n' and 'j' option for chan_local or the SIP channel 
option to set a specific To: header.

Is there such documentation available (except on the mailing list and 
the voip-info wiki (which is usually very old))?

thanks
Klaus