Since PSTN and PBX systems power phones via the standard wiring, little thought is ever put into powering phones. By powering the phone over the phone line, power outages are not an issue (until the UPS keeping the PBX up runs out of power). In a VoIP deployment, the IP phones need power, whether from a local power supply or over Ethernet in-line power. However, in the event of a power outage, anbsp;...
|Title||:||Proceedings of International Conference on Advances in Information and Communication Engineering|
|Publisher||:||AICE Foundation -|