 Voice over Internet Protocol (VoIP) can help freelancers and other workers connect with employers and customers when they are out of the office.
Colin Duffy, council member of the Internet Telephony Services Providers' Association (ITSPA), explained that it can be useful to have services such as having voicemails forwarded as MP3s to your email inbox.
"With voicemail, your inbound call is answered by the network, the message is left, and then converted to an MP3 file and emailed to you," he said.
"So you can pick up your voicemail wherever you are, so long as you have access to the internet. You also get an SMS alert that you've got [a voicemail]."
Other benefits include call forwarding, meaning you can give out an ordinary number rather than a mobile number.
"If your only contact number is a mobile phone number, people are quite suspicious of you - unless you're a plumber or a builder, because people expect them not to be at home [but] to be onsite," he stressed.
According to research by T-Mobile, 42 per cent of small businesses believe they pay too much for the mobile communications plans.
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