Your alarm system should be inspected and tested annually. For commercial applications, NFPA 72 requires fire alarm systems to be inspected and tested annually.
Most manufacturers recommend battery replacement every 3-5 years. The battery in your system is not just for backup power, rather it is an important part of the power supply in your system, so maintaining the battery is important
In most cases, there are other communications options such as universal cellular and internet communicators that can be installed in order to maintain communications in place of a land line. Contact us for more information.
Many systems do have that capability. The Bosch security and Hikvision camera systems that we install have several options to accomplish remote control capability. Contact us for more information.