In most offices that are using private branch exchanges (PBX) or an upgraded version of IP-BPX to connect multiple telephones within an office, a need to connect with the outside world is always there when the local telephone exchange is not attached to the public switched telephone network. This is where SIP Business Trunking is required, to connect telephone networks with voice over Internet Protocol (VoIP) to the outside world. In last few years, most offices with traditional private branch exchanges are replaced by the VoIP version of the PBX known as IP-PBX.
The Process
SIP stands for Session Initiation Protocol. In telephone systems that are established on VoIP, SIP is used to send standard messages to open a call, or to close a call that depends on IP. For the companies that use VoIP, but require several lines to communicate outside of the network, SIP Trunking is used. With the help of SIP Trunking, companies are able to replace several phone lines using only one internet connection. This allows companies to use only a single internet connection to make several outbound calls, or receive a number of inbound calls, using VoIP and SIP Business Trunking. The VoIP manages the termination and initiation of all the calls that are directed to a public switched telephone network.
Which is the Better Choice? SIP or ATA with VoIP?
Along with SIP, another connection method is also used with VoIP networks. It is known as ATA, or Analog Telephone Adaptor. This is another method that allows VoIP connections to establish a connection with a PSTN (public switched telephone network). Many companies are confused between both of the choices,and often are unable to determine which one is better with VoIP.
There are several perimeters to compare between the two connections. First, a business owner may find it interesting to know how much each one costs. The biggest difference between SIP and ATA is that ATA charges a monthly fee that varies depending on the countries you are trying to contact, while SIP provides a completely free service to business owners. You can use SIP like any other online audio/video service to communicate anywhere in the world without incurring any charge.
Secondly, the cost of necessary equipment is also important. While SIP only requires headphones with a microphone for audio conversation, or a webcam for a video chat, with ATA you need to buy an ATA telephone,along with a converter thatis compatible with your VoIP connection.
Now, the most critical thing to consider is the accessibility of both of the connection methods. While SIP can only communicate with connections using the same service, ATA can make calls to anyone with a cell phone or a land line number. So, before deciding on any connection method with your VoIP, you need to determine where and who you need to call with your connection. Most companies that need to contact people anywhere and at any number go for ATA. As SIP is more cost effective, most of the small businesses opt to use SIP with their VoIP connection.
Even though both connection methods have advantages and disadvantages over each other, ATA is currently the more professional choice because of its ability to contact any number. SIP is very cost effective when compared to ATA, which is the reason why it is most popular with small business owners.