One of the most common questions I receive all the time is 'do I need a phone line in order for my alarm system to transmit signals?' Traditionally, yes, but today no. Alarm systems, probably 90% plus, are being put in with cellular communication. It's a lot faster, it allows a central station to affect your alarm system by actually changing things if necessary, and it eliminates the biggest danger the alarm industry's always had, somebody cutting your phone line.
If you have a question on this or any other topic, please let me know at 619-797-6603 and be safe in your home, thank you.