In the past, when you call an office building or business, you would either be transferred to the department you want to talk to, or given their extension number. This extension is usually a 2-3 digit code that when dialed, transfers you automatically to the particular person or department you want to speak with. The reason why this code works is because it is programmed into a PBX system.
Cheers International Telecom Ltd
We are a digital telecommunications company and a telecoms service provider licensed by the DTI and regulated by OFTEL. Our offices are located in London, UK and in Dublin, Ireland. We are members of ECTA, the European Competitive Telecommunications Assoc
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