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Difference between SIP phone and VoIP



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Even though VoIP and SIP supports the IP-Technologies, yet they are not the same. Session Initiation Protocol is a tool which enables VoIP. All popular communication systems are a mixture of different alphabets which makes buyers confused these days. Further, matters get worse when people in the industry use these terms interchangeably although these terms are technically different. SIP and VoIP are great examples even though they achieve the same goal which is of connecting phone calls through the internet, yet they are not identical. Therefore, in this article, we are going to look at the differences amongst SIP phone and VoIP phone.

VoIP phone service

The term VoIP refers to Voice over internet protocol. VoIP is a broad term which covers all the phone calls that are made through the internet compared to the traditional phone lines known as Public Switched Telephone Network (PSTN). Other terms which are generally interchangeably used with the VoIP include internet telephony, IP telephony, VoIP over broadband, IP Communications, broadband telephony, and broadband phone services. All these terms explain the fact that the internet broadband is used to transmit the voice signals digitally to another phone or the endpoint. For the most fundamental function, you are going to just require a VoIP enabled phone along with a VoIP software. This will be enough for making calls over the internet. It is the best choice if you wish to eliminate the mess of hard-line telephones in your office. You can do so without depending on cell phones as your alternative. A VoIP phone service allows you to preserve an official phone line for your business. Since VoIP is a limited technology to Voice transmission it can help keep the usage to a minimum. Some SIP trunk providers UK might even offer you unlimited minutes to get you a better deal. Therefore, when it comes to the most basic communication VoIP technology is pretty hard to beat in practicality and cost. The term VoIP also includes a group of protocol Technologies which includes Skype protocol and open standard of which SIP trunk technology is an example. VoIP phone service is generally deployed in combination with an application like Google talk or Skype with IP-enabled PBX equipment or through a hosted VoIP service.


It is significant to ask what SIP phone is utilised for before installing. The Session Initiation Protocol is a communication protocol which is used widely for the management of multimedia communication such as audio and video calls.

Therefore, SIP is one of the particular protocols which enables VoIP. It also defines the messages which are sent between the endpoints. Further, it governs the launch, termination and other important essentials of a call. A SIP phone can also be used for transmitting information among two points or many. Additionally, it is used for video conference, media distribution, instant messaging and other apps, as it has been established and standardised under the support of internet engineering task force (IETF).

In a nutshell, if you wish to know a complete communication solution for your business needs then SIP phone is the best option. Employing any further tools like Asterisk can make your SIP communication platform much better since you have the ability to customise it according to your requirements.

Why is protocol important?

A protocol is a system which has digital rules for exchanging messages between or within computers, phones, and other digital devices. For one device to communicate with another device the developers have to use a well-defined format for exchanging messages. A protocol defines the simple text, Syntax, and synchronisation of communication. In order to be effective, the protocols must be agreed upon and used by the developers of all the connected devices or apps. For such reason, protocols are generally evolving in the industry standards which makes it easy for multiple providers to create endpoints which can communicate with each other.

Examples of Deployment

When the majority of the people hear VoIP phone service, they begin to imagine a hosted VoIP solution, where a provider hosts and operates the PBX functionality which manages call handling, Voicemail, and all other apps. The customer IP-enabled telephones connect to the internet network and to the provided service and software ultimately. However, this is just one kind of deployment. The SIP trunk providers also delivers phone services and unified communication to customers with SIP trunk enabled PBX system. In this case Voicemail, call management, auto attendance, and several other services are offered by the PBX. As SIP phone also provides the connection between PBX and Public Telephone Network substituting the requirement for Legacy phone lines or Primary Rate Interface (PRI). This allows businesses to choose the IP-PBX hardware and software which works best for them. Also, free from the cost and rigidity of traditional telephone lines and carrier in relationships.

The Other method to deploy the VoIP services is ‘managed and hosted IP-PBX system’. The latter is a hassle-free form where you have a service provider who manages everything. You do not need to buy the equipment yourself to setup the SIP trunks since you will be receiving a pre-configured VoIP phone system. This is an ideal situation for businesses which do not have the money to set up a completely customised SIP trunking service. You must remember that it includes making apps and purchasing hardware hence if you are not up to doing everything then you must choose managed IP-PBX. The SIP technology is becoming a preferred method for deploying VoIP services. Among the many advantages which indicate how it works better in the VoIP services are the decreased prices it offers, the boosted efficiency along with its scalability in comparison to the older systems.

In reality, there is no such thing as VoIP phone versus SIP phone. The SIP industry is a standard technique of accomplishing VoIP however it is an ideal deployment method since it allows scalability. Your business would not be restricted to using VoIP phone service because you will have the option of expanding to instant messaging, video calling and much more. Businesses who want to enhance their communication and reduce the cost by switching VoIP must carefully think about all the methods it can be deployed together with SIP and choose the best one which provides the greatest advantage for them.