SIP Centrex / Hosted IP Telephony SIP Centrex / Hosted IP Telephony A Hosted Telephony / Hosted IP Telephone service provides standard phone system functionality without needing your own phone system. All the functionality, maintenance and upgrades that you require are provided by FullDuplex. You can either have a handset on your desk or use 100% software or both. Great for business, if you don't want a capital out lay for a telephony platform. Suitable for companies of all shapes and sizes, start ups, home workers, single site, multi site, etc. This service provides standard phone system functionality without needing your own phone system. All the functionality, maintenance and upgrades that you require are provided by FullDuplex. Some of the functionality provided: Call Transfer Hold Conferencing Voicemail to email Music on hold Busy Lamp field Fax to email* Address Book Call Recording* Computer Telephone Integration* You can either have a handset on your desk or use 100% software or both.