Impact of Seasonal Suspension on Phone Service

During the winter I am away from my home and put my Comcast Services (cable TV and internet) on a Seasonal Suspension.  I'm thinking of adding phone service.  The problem is that my security system uses the phone  to call out to the alarm company if there is a break-in or a fire is detected.   Will the Comcast phone service still be usable during a Seasonal Suspension and if so will there be any limitations on the calling area or number of calls?