The era of traditional telephony is gradually coming to an end. Most of the major telecommunications companies abandon analog lines and switch to VoIP-systems, with the SIP-technology enjoying the wide popularity.
There are two solutions for IP-telephony based on the SIP protocol, which are hardware and software. The former involves the use of GSM gateway, and the latter the use of a virtual voip trunk. Many companies increasingly prefer the second option because they consider it more convenient and profitable. In 2014, the number of SIP-trunks that are used all over the world increased by more than 50%.
What is a SIP-trunk?
The sip trunk is a virtual voice channel that is established between the VoIP provider and a customer’s IP-PBX. Using it, you can connect an unlimited number of phone numbers. Subsequently, it will be possible to make multiple simultaneous calls from each number.
SIP 2.0 protocol is used To send traffic. Using it, your ISP connects voice channels to PBX. A company that provides telecommunications services to you assigns DID phone numbers (the abbreviation stands for Direct Inward Dialing). In most countries, the existing numbers can be translated into the format of DID and "tied" to a trunk.
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The SIP-trunk as a VoIP GSM gateway alternative
The use of SIP-trunk eliminates the need to purchase and maintain the VoIP-gateways. Calls to the IP-based network are directly made via the SIP protocol. Moreover, the trunk is capable of providing a higher quality of voice communication. This is due to the fact that this solution does not provide for the conversion of analog lines to IP.
Advantageous of VoIP-trunks
Rejecting the standard telephony and switching to SIP-trunks, the company can enjoy a number of advantages:
- Low monthly fee for the use of channels and DID-numbers;
- Low communication rates;
- Ability to connect international calls;
- Moving to another office and keeping a phone number;
- Easy connection of the PBX to the SIP-a trunk;
- Assigning additional channels to an existing trunk;
- Payment for required voice channel business only.
The VoIP-trunk combines all the advantages IP-based technologies in the transmission of voice traffic and allows the maximum use of a standard PBX.
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