The first Underwriters Laboratories (UL) listings in the security industry for any digital cellular alarm system has been achieved by Telular Corp., for its Telguard Digital models TG-7 and TG-8 for commercial fire and burglary alarm communications. Using patented technology, the systems transmit alarm signals to monitoring stations over next-generation GSM digital cellular networks.

Telguard Digital is UL-approved for alarm communications in all residential and commercial burglary systems. Two models have achieved UL grade A burglary and UL bank, safe and vault listings, making them suitable for commercial burglary applications. All digital models are UL-approved for primary alarm communications on residential fire systems and secondary on commercial fire systems.