Doing more with less is a familiar challenge across the National Health Service (NHS). So, when voice over IP (VoIP) services that route phone calls over existing IP-based networks became available, Ricky Mackennon seized the opportunity to save money. The replacement of internal extension lines with VoIP was the start. The next step of the revolution – replacing traditional ISDN and BT Featurenet lines with BT One Cloud Cisco SIP trunk

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