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4x SIP accounts, 5-way conferencing, Action URL/URI, Call forward, call waiting, call transfer, Call hold, mute, DND, Custom ring tones / provisioning, Dial plan per account, Direct IP call, One-touch speed dial, hotline, Redial, call return, auto answer, RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035), Set date time automatically or manually, XML Browser

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Anonymous call, anonymous call rejection, Busy Lamp Field (BLF), Call park, call pickup, Intercom, paging, Message Waiting Indicator, Music on hold, Voicemail

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16 bit depth color, 3.5” 480 x 320 pixel color display with backlight, Caller ID with name, number and photo, Dual-color illuminated LEDs for line status information, Intuitive user interface with icons and soft keys, LED for call and message waiting indication, National language selection, Wallpaper

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Acoustic Echo Cancellation (AEC), Adaptive Jitter Buffer (AJB), Auto Gain Control (AGC), Codecs (iLBC, G.722, G.711(A/μ), GSM_FR, G.723, G.729AB, G.726 -32), Comfort Noise Generation (CNG), DTMF (In-band, RFC 2833, SIP INFO), Full-duplex hands-free speakerphone with AEC (Acoustic Echo Cancellation), HD voice ( HD handset, HD speaker), Packet Loss Concealment (PLC), Voice Activity Detection(VAD)

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AES encryption for conguration le, DHCP / static / PPPoE, Digest authentication using MD5/MD5-sess, DNS-NAPTR/DNS- SRV (RFC 3263), HTTP / HTTPS web server, IEEE802.1X, NAT Traversal STUN mode, QoS( 802.1p/Q tagging (VLAN) , Layer 3 ToS DSCP), SIP server / proxy redundancy, SIP v1 (RFC2543), v2 (RFC3261), Time and date synchronization by SNTP, TLS (Transport Layer Security)

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Sangoma

Zycoo

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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

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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

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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)

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Bulk Import Utilities (Trunks, Extensions, Users, Phone Numbers), Integrated Intrusion Detection, System Dashboards

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User Control Panel (UCP)

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2 Port GSM Module, 2FXS-FXO Module, 4 FXO Module, 4 FXS Module, 4 Port GSM Module, Without Module

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2 Port GSM Module, 2FXS-FXO Module, 4 FXO Module, 4 FXS Module, 4 Port GSM Module, Without Module