
Modern day Time Clock Systems now use a single cable to provide both data connection and electrical power to Biometric, badge, clock card systems and even keypad entry time clock terminals.
Aptly
named Power over Ethernet or PoE, uses standard IEEE 802.3 technology in which CAT 5 and higher data cables have 4
pairs of internal wires and where only two of are needed for data transmission,
power is transmitted unused wires. Hence the name, Power over Ethernet, or PoE
for short, that’s PoE, not Poe, as in Edgar Allen