Methods and systems for managing a call session
Methods and systems for providing foreign call back number...
Methods of placing emergency calls using data networks
Microprocessor controlled dispatcher activated response...
Mobile automatic location identification (ALI) for first...
Mobile telephone configurable as a monitor and a two way radio
Monitored personal emergency response system
Monitoring and communication system for stationary and...
Monitoring apparatus using telephone link
Multi-site personal emergency telephone system method and...
Multi-subscriber warning system
Multimedia emergency services
Multimedia emergency services
Multimedia emergency services
Multimedia emergency services
Multimedia emergency services
Multiple identification access codes for a single data file
Nationwide table routing of voice over internet protocol...
Optimised control of traffic load on switches in a...
Organization of a telecommunication network in exceptional...