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2x SIP accounts, 5-way conferencing, Action URL/URI, Call forward, call waiting, call transfer, 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

2 LCDs (Main + DSS), 6 SIP Lines, Action URL / Active URI, Black/White List Call Filtering, Call log (100 entries, in/out/missed), Network Time Synchronization, Phonebook (500 entries), Programmable DSS/Soft keys, Remote Phonebook (XML/LDAP), Voice Message Waiting Indication (VMWI)

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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

Anonymous Call (Hide Caller ID), Auto-Answering (per line), Call Forwarding (Always/Busy/No Answer), Call Hold / Resume, Call out / answer / reject, Call Parking/Pick-up (depending on server), Call Transfer (Attended/Unattended), Call Waiting, Caller ID Display, Do-Not-Disturb (per line / per phone), Hot Line, Hot-Desking, Intercom, Local 3-way Conference, Mute / Unmute (microphone), Redial/Auto-Redial, Speed Dial, Voice Message (on server)

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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)

Codec:G.711A/u, G.7231 high/low,G.729a/b, G.722,G.726, Comfort Noise Generation (CNG), DTMF: In-band, Out-of-band(RFC 2833) and SIP INFO, Echo Cancellation(G.168), HD voice ( HD handset, HD speaker), Voice Activity Detection (VAD)

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132 x 48 pixel graphical LCD with backlight, Caller ID with name, number, Illuminated LEDs for line status information, Intuitive user interface with icons and soft keys, LED for call and message waiting indication, National language selection

DSS Key-mapping LCD x1:color-screen LCD, HD Hands-free Microphone (0 ~ 7KHz) x1, HD Hands-free Speaker (0 ~ 7KHz) x1, HD Handset (RJ9) x1, Keypad: 38 keys, Main Chipset: Broadcom, Main LCD x1: 2.8 inch (320×240) color-screen LCD, RJ45 Ethernet Jacket x2: Network x1 (802.3AF POE Class 2 Enabled), PC x1 (Bridged to Network), RJ9 Phone Jacket x2: Handset x1, Headphone x1

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2 line keys with LED, 4 context-sensitive “soft” keys, 6 features keys (Headset, Speaker, Hold, Mute, Transfer, Conference), 6 navigation keys, Volume control keys

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1x RJ9 (4P4C) handset port, Dual-port 10/100 Mbps Ethernet, Power over Ethernet (IEEE 802.3af) (PoE), class 3

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Auto-provision via HTTP / HTTPS, FTP / TFTP, Auto-provision with PnP, Call hold, mute, DND, Configuration , Browser / LCD-Menu / auto-provision, HD speaker, Local tracing log export, system log, Phone lock for personal privacy protection, Reset to factory, restart, reboot

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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, HTTPS certicate manager, IEEE802.1X, IPV4 / IPV6, NAT Traversal STUN mode, Open VPN, QoS( 802.1p/Q tagging (VLAN) , Layer 3 ToS DSCP), SIP server / proxy redundancy, SIP v1 (RFC2543), v2 (RFC3261), SRTP, Time and date synchronization by SNTP, TLS (Transport Layer Security)

Firewall, openVPN, Network Access Control: 802.1x, QoS, Support DHCP client on WAN, Support DHCP server on LAN, VLAN, VPN: L2TP (Basic Unencrypted) / OpenVPN

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S300

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Sangoma

Fanvil

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, E1/T1 Module, Without Module

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2 Port GSM Module, 2FXS-FXO Module, 4 FXO Module, 4 FXS Module, 4 Port GSM Module, E1/T1 Module, Without Module