24 Port, 50 Port, 8 Port | — | — |
FXO, FXS | — | — |
G.711A 64 kbps, G.711U 64 kbps, G.723 5.3/6.3 kbps, G.726, G.729a (8kbps), T.38 | 1G802F, G.711A 64 kbps, G.711U 64 kbps, G.722 64 kbps, G.726, G.729 A/B 8 kbps | — |
24 FXS ports on an RJ-21 connector, 600R, 900R or CTR-21 line impedance | — | — |
1000BaseT / 100BaseTx / 10BaseT, full / half duplex, 1x RJ-45 Gigabit Ethernet | 2 T1/E1/PRI w/ RJ-45 1 10/100/1000 Ethernet | — |
Message waiting indicator – audible, visual, Call forward – unconditional, busy, no-answer, Call transfer – blind, consultative, Call Waiting, Caller ID, Do Not Disturb, Music on hold, Three Way Calling | — | Call Forwarding, Call History – Call Detail Records and Call Event Logging, Call Recording, Call Screening, Call Transfer, Call Waiting, Caller Blacklisting, Caller ID, DISA, Do Not Disturb, Paging/Intercom, Speed Dials, Three Way Calling, Voice Mail – Voicemail to Email |
Dial planner – sophisticated call routing capabilities, standalone or gatekeeper/proxy integration, Direct Dialing In (DDI), SIP registration to multiple proxies | SIP registration to multiple proxies | — |
Sangoma | Digium | Zycoo |
— | 8E1/T1 and 240 SIP Channels, 1E1/T1 and 30 SIP channels, 2E1/T1 and 60 SIP channels, 4E1/T1 and 120 SIP channels | — |
— | N/A | — |
— | — | Announcements, Built in Conference Bridge/Service, Calling Queues (ACD/IVR), Dictation, Directory, Fax to Email, Feature Rich User Control Panel – Visual Voicemail, Flexible Time Based Call Routing, Follow Me/ Find Me Calling, Hunt/Ring Groups, Music On Hold, Personal IVRs, Secure Communications (SRTP/TLS), Support for Video Calling, Voice Mail Blasting, Wake Up Calls |
— | — | Open Standards Support for Multiple Signaling Protocols: SIP, IAX2, PRI/T1/E1, POTS/Analog, ISDN, Soft Phone Support, Specialty Device Support – Door Phones, Overhead Paging, Strobe Alerts, Paging Gateways, Voice Gateways, Failover Devices, WebRTC – Browser Based Calling (thru UCP) |
— | — | Bulk Import Utilities (Trunks, Extensions, Users, Phone Numbers), Integrated Intrusion Detection, System Dashboards |
— | — | User Control Panel (UCP) |
— | — | 1 Port GSM Module, Without Module |