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	ESI Digital Telephone Systems IVX C-Class   IVX S-Class   IVX E-Class   IVX X-Class   ESI-600   Cordless Handsets
Now also available—product videos  Why ESI, Hallmark Features VIP-VIP Professional ESI PC Attendant Console Presence Management
	Voice Mail Auto Attendant Music/Message on Hold Enhanced Caller ID Automatic Call Distribution Esi-Mail Unified Messaging Optional VoIP Telephony
Vertical/Comdial Business Communication Systems           Call Paging Ani/DNIS Support Automatic Route Selection Background Music Battery Back-up Call Costing & SMDA Reports Call Forwarding Conferencing (7 Party) Digital Wireless Telephone Support Direct Inward Dialing (DID) Direct Inward System Access (DISA) Disconnect Supervision DSS Status Button E&M Tie Line Support E911 Line Type Enhanced Night Mode External Paging Interface Flexible Station Numbering Plan Hot Desking Industry Standard Telephone Support ISDN-PRI Interface Support Line Groups Meet-Me-Answer Page Modem Support Multiple Redial Music Interface Music on Hold Networking (Both IP and ISDN) Paging Access Power Failure Transfer Self Diagnostics Station Hunting Station Speed Dialing System Speed Dial System Status Reports