[Serusers] alternative for cpl-c No Answer timer

Bogdan and other who are interested, What would you advice at present if I want to use SER and offer a forward on No Answer feature ? As TM and thus CPL-C does not support the timeout (timer) option I understand it can not be used to implentent this feature. Other options : use SER -> asterisk (FS) In this case all calls are sent to the FS maybe some smart thing can be done to only send users with a no answer script. If I want to enable PSTN forwarding + Billing I think I would then end up with the following: SER -> Asterisk (FS) -> SER -> Asterisk (PSTN) -> PSTN GW Is this the only way ? Is there something better ? any ideas are welcome. regards, Arne.