FortiFone Dialing Delay

Is there a way to increase the time between a pause during dialing and the phone automatically dialing the numbers already entered? For example, I want to dial a phone number, I start dialing XXX-XXX then pause to look at the last 4 digits, if I pause too long the phone attempts to dial the first 6 digits I entered instead of waiting just a few more seconds for me to enter the last 4 digits.