A Session Initiation Protocol (SIP) trunk is a service that enables enterprises with a PBX to use VoIP communications in real time. By connecting a SIP trunk to a traditional PSTN (Public Switched Telephone Network) internal telephone system, businesses can communicate over IP outside the enterprise.
Enterprises can replace traditional PSTN lines with an externally connected IP phone system through a SIP trunking service, creating a single conduit for multimedia components, including voice, video and data. As a result, a SIP trunking service – usually offers greater cost savings and reliability.
How Does A SIP Trunk Works? A SIP trunk combines data and voice connections on a single line. By serving as a converter between a telephone system and an Internet company’s connection, a SIP trunking device allows the data network to carry voice traffic. The features of a SIP trunk typically include local and long distance calls.
If call traffic runs on the same connection as other traffic, such as email and Internet browsing, packets will be discarded and voice flow may be interrupted. To mitigate this, many companies divide voice and data into two separate Internet connections. But they still depend on the service provider’s merits not to drop the packets from the Internet to the PBX.
Main Components Of A Sip Trunk
– IP PBX: It is an IP-based PBX with all end users connected via an IP network. It also connects calls between VoIP users and local lines while allowing all users to share a number of external telephone lines.
– ITSP (Internet Telephony Service Provider): The role of an ITSP is to ensure connectivity to the PSTN network from an IP network for mobile and fixed communication devices. It also carries IP communications over a private or public IP network.
– Border Device (Border Element): The border device facilitates connectivity between the internal IP network, the PSTN network and an external IP network. The frontier device can be a SIP firewall or SIP edge device that allows connection to the firewall, or it can be a switch that allows transfer of calls to and from the PSTN network. Border devices are usually managed by the service provider.
Benefits of the program
– It eliminates the need to buy equipment, such as interface gateways between IP voice and PSTN networks.
– Reduction of monthly expenses since only one connection for voice and data is necessary.
– Eliminates the need for PRI / BRI connections, lowering telephony costs.
– It allows companies to have external access to PSTN connectivity, thus reducing long distance charges.
– Establish points of presence in different cities around the world, so that companies can establish a local number instead of relying on an 800 number.
– Possibility to access the benefits of a Hosted VoIP service.
In TelOnline you can purchase your SIP trunk and help your company improve communications, contact us for a free demonstration or consultation www.TelOnline.com or call: USA +1.954.894.6181, Colombia +57.1.508.8884 or Mexico +52.55. 4163.4865.