Video Phones Office Phones Dect Phones Conference Phones Phone Systems Phone System 40 Recommended capacity of up to 40 extensions and 30 simultaneous calls. Phone System 60 Recommended capacity of up to 60 extensions and 40 simultaneous calls. Phone System 75 Recommended capacity of up to 75 extensions and 45 simultaneous calls. Phone System 100 Recommended capacity of up to 100 extensions and 60 simultaneous calls. User Capacity: 40Call Capacity: 30Intel Quad CoreSingle 120GB SSD2GB Ram4 GB Network PortsSmall Form Factor CaseConsole Web GUI SSH1 VGA PortWall Mount Plate Included1 Year Warranty User Capacity: 60Call Capacity: 40Intel Celeron Quad CoreSingle 120GB SSD2GB Ram3 GB Network Ports2 PCI Express Slots1U Form Factor Case Local VGA / ConsoleWeb GUI SSH1 Year Warranty User Capacity: 75Call Capacity: 45Intel Celeron Quad CoreSingle 120GB SSD2GB Ram(x3) GB Network Ports1 PCI Express SlotSmall Form Factor Case Local VGA / ConsoleWeb GUI SSH1 Year Warranty User Capacity: 100Call Capacity: 60Intel Celeron Quad CoreSingle 250GB SSD4GB Ram3 GB Network Ports2 PCI Express Slots1U Form Factor Case Local VGA / ConsoleWeb GUI SSH1 Year Warranty Built-in Features Business Features Calling Features Telephony Support Calling Queues (ACD)Interactive Voice Response (IVR)Unlimited extensionsConference BridgeFax to E-mailRing GroupsMusic on HoldCalendar with third party integrationVoicemail BlastingFind Me / Follow Me CallingWake Up CallsSupport for Video CallingSecure Communications (SRTP/TLS)AnnouncementsText to Speech Three-Way Calling SupportVoicemailVoicemail to E-mailCaller ID SupportCall TransferCall RecordingDo Not DisturbCall WaitingCall History/Call Detail RecordsCall Event LoggingSpeed DialsCaller BlacklistingCall Screening Open Standards Support for Multiple ProtocolsSIP, PJSIP, IAX2PRI, T1,R2, POTS/Analog, ISDN, GSMWebRTCSoftphone SupportSpecialty Device SupportDoor PhonesOverhead PagingStrobe AlertsPaging GatewaysVoice GatewaysFailover DevicesDesktop/Mobile Phone Support