asterisk users - Nov 2006 - Subscriptions and call back on busy problems with Snom phones

Hello guys,

as davidded wrote on voip-info.org 
(http://www.voip-info.org/wiki/view/Asterisk+phone+snom), 
currently the Call completion feature of the SNOM phones interferes with 
subscriptions to Asterisk.

To make subscriptions work correctly, you have to disable the 
"call_completion" feature of the snom phones. Without disabling this
feature,
after a call the subscriptions of the monitored extensions get lost.

Unfortunately "call_completion" is needed for "call back on
busy". So you
have decide between subscriptions or "call back on busy" :-(...

Has anybody else experinced these problems? Maybe anyone got a patch :-)?

Thanks,
Andreas Haardt