Ip Telephony and Power Over Ethernet - A excellent Marriage

Do you remember when the power went out at your house, and the phone still worked? The guess is that the phone business sends very low voltage power over the telephone line. This power is isolate from the electric company's network, so even if the power goes out at your house the phone will still function.

The same needful exists for business phone systems. Manufacturers of these systems furnish standards for sending low voltage power straight through the extension ports. This power allows for the extensions to have features like backlit displays, normal functioning, and ringing. In some cases, consoles with large displays or telephones with adjuncts like speakerphones do want local Ac power. However, the majority of extensions use line power.

Cables For Network

Enter the era of Ip telephony. Ip telephones run over your company's data network. The same Lan cabling that connects your data tool (servers, workstations, etc.) also join together your business Ip phones. In theory, Ip telephony systems are just another application running on your data network.

An early concern with devices like Ip telephones was power. Ethernet standards never included requirements for power on cabling. The switches in the network room, your workstation computer, and your company's servers all have local power supplies that plug into an outlet. The first Ip telephones that were released came with local power supplies as well. Because businesses typically deploy more phones than data equipment, provisions for power outlets at each factory site had to be made. This proved to be more difficult than original installations which naturally complex plugging the phone into the jack. Instead, each Ip telephone factory required a data jack and a power outlet.

In order to do away with local power requirements, some manufacturers implemented rights methods to send low voltage power over Ethernet lines. Others in case,granted midspan power units that were installed in front of current data switches to add power in series. The originate of Electrical and Electronics Engineers (Ieee), one of the world's foremost technical expert societies, ratified the 802.3af Power over Ethernet (PoE) suitable in June of 2003. The 802.3af PoE suitable allowed network hardware manufacturers to produce switches with integrated PoE support. Manufacturers of endpoint devices like Ip telephones, wireless way points, and Ip cameras could now produce compatible devices as well.

As 802.3af PoE became more popular, most rights standards fell to the way side. Today the majority of Ip Pbx and Ip telephony manufacturers have adopted this standard. This is great for the buyer because prices for this technology have dropped significantly. Entry level buyer PoE switches can be found in the middle of 0 and 0. Although most Ip telephones hold both 802.3af PoE and local power furnish options, it now makes sense to change your old switches to units supporting PoE. Consider this: Typical Ip telephone local power supplies cost in the middle of and each. If you multiply this by 24 phones, then you are well into the cost range of a new 24-port switch that supports PoE. For the cost-conscious business owner the respond is clear. You can now make the switch to PoE and save.

Ip Telephony and Power Over Ethernet - A excellent Marriage

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