The animated TECHTip Tutorial is available here.

TECHtionary analysis is that most VoIP phones and soft phones require power. Customers should add power injectors, backup power, and generators to all critical functions including diverse wiring to emergency centers.

Electrical power is needed by more and more devices at the end of the network. VoIP phones are increasingly popular and there are now low-powered printers that are consuming power. According to industry sources, there is no uniform implementation of standards with regard to PIN assignments and voltages provided/required. Here are some of the options with output DC [Direct Current] voltage on the same PIN (metal connectors) and RJ [Registered Jack] types as data connections:

• Single port injector - used for a small number of devices

• Multi-port injectors - used for a large number of devices (e.g. 50+)
• Active taps - transform input DC voltage to a different DC voltage
• Passive taps - same DC output voltage as input DC voltage
• Passive injectors - insert power withOUT short-circuit (lightning, etc.) or over-current protection
• Active injectors or Fault-protected - provide continuous monitoring of short-circuit conditions and out-of-range current (surges, sags) protection

Check with the manufacturer for specific options.

[See the whole tutorial for VoIP Phones: Inject Them With Power - Taps & Injectors]

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[tags]voip,network,dc,taps,injectors,rj[/tags]