Not all SIP trunking services are the same. Depending on the service provider like SIP.US, there may be some requirements or co-requisites which can affect voice quality or the number of calls you can take.
Some providers include a co-requisite provision where the SIP trunk is bundled with their Internet service. But is this the best way to go about the service? Having a separate SIP trunk provider from your Internet service provider could be more advantageous to you.
SIP and VOIP Service Provider
SIP trunking uses the same technology as voice over IP (VOIP). It is a separate service which a company can take advantage of no matter what high-speed broadband service is used. It is not physically tied to the internet service.
A VOIP service provider is a company which provides a VOIP proxy for your calls. It just happens to depend on your Internet connection to work. The proxy service is where the calls are routed through, whether these are outgoing or incoming calls.
For a SIP trunk, when a call is made to any of the company’s phone numbers, they end up on the proxy server. As far as the caller is concerned, your number reaches you without the necessary international toll gateway charges.
A company that requires multiple global locations doesn’t need to set up an office in other countries. The SIP trunking proxy is set up for each country, and these are local charges for the callers, or they can also be toll-free, depending on the model used.
This is very appealing to international customers and technical support for international customers. The SIP trunk proxy can have multiple lines mimicking the behavior of a trunkline.
A company can have multiple internet connections from different ISPs for better call quality and more volume capacity. The call connects via the Internet service to the SIP trunk proxy, wherever it is located. The SIP service is transparent and invisible to the callers.