Business Lines & Call Packages Explained

  • analogue
  • isdn
  • Voip

Many businesses in Northern Ireland are changing over from the traditional voice options of Analogue Lines and ISDN lines to some version of VoIP.

VoIP stands for "Voice over Internet Protocol." VoIP allows you to make and receive calls through an existing internet connection. The technology simply converts the voice signal from an ordinary phone into a digital signal, which travels over the internet, and then converts it back again.

You can deal with all calls using a VoIP phone, your mobile or your PC.

Here at Fenix Solutions we offer single and multi-use VoIP options.

SIP Channels

Many businesses are also migrating their traditional analogue and ISDN lines over to SIP (Session Initiation Protocol) SIP is usually preferred by companies with numerous branches or remote workers, whose employees depend heavily on multimedia communications.

VoIP is used for making and receiving calls, whereas SIP can also do this but it can also carry all forms of media including voice, data and video. This means that SIP systems allow users to make voice and video calls online.


There are a number of technical differences between VoIP and SIP, but we don't want to bore you with that. The simplest way to explain the key differences is shown in the table below.



Can make and receive calls

Can make and receive calls

VoIP phones must be connected to a PC and the PC must be on to be able to make and receive calls

Can make voice and video calls

VoIP is useful in small businesses with minimal locations

SIP phones work without the need for a computer. They only require a modem to be able to work.

VoIP is not a discrete technology in its own right.

SIP has the ability to interact intelligently with other protocols

If you are a small business who simply wants to make and receive calls, then VoIP will work well. For larger businesses SIP is a much better option.