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18. How do I set up a simple VoIP network on an existing LAN? |
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If the existing LAN is made up of standards-based Ethernet switches, it is fairly straightforward to set up VoIP on the network. Most small companies do not configure QoS on the LAN. The most straightforward deployment of VoIP is to use an IP PBX, which affords the most control to a company.
You plug the IP PBX into the network and configure the IP phones from the IP PBX. You can then plug the IP phones into the network switches and they will register with the IP PBX. You then plug AC adapters into the wall to power the phones, unless your switches support IEEE 802.3af for delivering Power-over-Ethernet wires.
You can select an Internet service telephony provider (ITSP) and have SIP service running the same day, significantly faster than the 2-3 weeks required for phone services to be set up by a traditional phone company.
In fact, you do not even need an ITSP if you only use your VoIP calls for free communications with branch offices, whose IP phone systems can be interconnected over the internet. |
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