V8: Preferences → CallForwarding
V10: Identity → Features → CallForwarding → Timeout
Menu → Call Features → Call Forwarding → Forward after Timeout → Enable Forwarding
8.7.4
This setting enables/disables the feature Call Forwarding No Reply (CFNR), i.e. when it is turned on, all calls to the associated identity are diverted to the target number specified in the "Forward to" text field. This happens after the time specified in the "Timeout" text field has elapsed. If the fields "On/Off code" are left blank, the diversion is handled by the Snom phone itself, otherwise - remotely controlled - by the PBX/SIP Server, if supported.
On/Off
Off