A Beginner's guide to SIP trunking

As Internet Telephony is gaining huge popularity day by day, SIP trunking is becoming a widely discussed issue in the world of Unified Communications and a lot of people are eager to be better informed about this new technology and the advantages it offers. In order to achieve this goal, we decided to write an article which will answer to your main questions concerning SIP trunking.

What is SIP ?

SIP stands for the Session Initiation Protocol. It is a signaling communications protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP) networks.

What is a SIP provider?

A SIP provider is any telecommunications company which provides SIP Trunking to customers, usually businesses.

What is SIP trunking?

Unlike in traditional telephony, where bundles of physical wires were once delivered from the service provider to a business, a SIP trunk allows a company to replace these traditional fixed Public Switched Telephony Network (PSTN) lines with PSTN connectivity via a SIP trunking service. In addition to VoIP calls, SIP trunks can also carry instant messages, multimedia conferences, user presence information and so on.

How can I deploy SIP Trunking?

A SIP trunk can connect your organization to an ITSP through either an IP-PBX or a Mediation Server. A Mediation Server performs encrypting, decrypting, and data translation between an Office Communications Server deployment on one side and the world beyond on the other.

Why do I need SIP trunking?

SIP Trunking helps businesses save money by using their existing Intra-net or internal communication system to access the Internet and outside phone lines. This system replaces a traditional phone system. SIP Trunking directs incoming and outgoing calls or data to an Internet phone provider or the company’s private network.

What are the main benefits of SIP trunking?

• Save money on long distance service- Long distance service typically costs significantly less with a SIP trunk connection.

• Eliminate IP-PSTN gateways (or even your entire PBX)- Because SIP trunks connect directly to your ITSP without traversing the publicly switched telephone network, you can get rid of IP-PSTN gateways and their attendant cost and complexity. Some ITSPs will even host a PBX for you, taking over both the PBX hardware and user administration if you choose, with substantial cost savings from reduced complexity, maintenance, and administration.

• Eliminate a redundant network- Deploying SIP trunking is a logical step towards the goal of having a single, IP-based network, rather than redundant telephone and data networks.

• Eliminate BRI and PRI subscription fees- With a SIP trunk connected directly to an Internet telephony service provider, you can dispense with costly BRIs and PRIs, replacing them with service that can cost significantly less. Furthermore, with SIP trunking you don’t need to buy lines in blocks of 24 or 32. Instead, you can buy the bandwidth you need, in smaller increments, and at better prices.

• Extend the capabilities of Office Communications Server with new services from ITSPs- With a SIP trunk in place, you can extend existing capabilities with additional services, such as E9-1-1 emergency calling. In the future, we expect ITSPs will to new services, such as greater integration with mobile phones and presence information on devices that are not running Office Communicator.

Voicebuy SIP trunking service

Nowadays, there are many SIP trunk providers in the market, you can choose the one which suits you best. Customers are attracted to Voicebuy SIP trunking services, as it offers a number of benefits for effective management of business communication:

• Budget-friendly

• Easy maintenance

• Complete communications system
  
  
• Flexible conditions

To start using SIP trunk services, you need to log into your Voicebuy account.

If you are using the service on a PC, you should install the corresponding PC to phone software, then register your SIP user name into Voicebuy's website and generate your user name and password in Voicebuy customer care interface. If you are using the service from a mobile device, you need to install mobile dialer application, enter 11993 operator code and then indicate your SIP user name and password to access your account.

Don't hesitate to start using Voicebuy SIP trunking, test your first call for free, as Voicebuy gives 1$ credit for free test to all of its customers.