If the user dials digits but then does not press the Dial softkey or the # key, the phone will wait for inter-digit timeout (10 seconds by default) before sending a SIP INVITE message to Cisco Unified CallManager.The inter-digit timer is not configurable as such. However it can be controlled via the dialplan. If you don't have a dial plan specified for the phone simply create one with the following rule. The timeout is your new inter-digit timer.