Chiltern Telecom have looked after our telephony and broadband services for five years now, they installed our current Avaya IP Office system and recently upgraded our ISDN lines to SIP Trunks. Chiltern have also upgraded security at our premises with the installation of both CCTV and Paxton access control. Across all the installations we have received, Chiltern have provided a professional and efficient service, with knowledgeable engineers who always recommend the best solution for our requirements.