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.
Our telephone systems embrace the latest feature-rich power of internet telephony voice-over-IP technology with the carrier-grade resilience that our customers demand, allowing cheaper calls to most international destinations.