| Call Features 2 SIP AccountsCall Waiting
 Call Forward
 Blind/attended transfer
 Call hold, Call mute, DND mode
 Speed Dialing, Hotline
 Redial, Call Return
 Auto-redial, Auto-answer
 Dial Plan
 5-way conference
 Peer Dialing
 Phone Features Adjustable Voice VolumeSelectable Ring Tones
 XML Browser
 Action URL/URI
 Keyboard lock
 Phonebook: 1,000 Groups
 Blacklist: 100 Groups
 Call Log: 100 Logs
 Support 5 Remote Phonebook URLs
 LDAP
 Support Multiple Languages
 Support EHS wireless headset(Plantronics, Jabra, Sennheiser)
 IP-PBX Features SMS, Voicemail, MWIMusic On-hold, Intercom, Multicast
 Call Pickup, Call Pickup in Group
 Anonymous Call
 Anonymous Call Rejection
 Management  Auto provisioning: FTP/TFTP/HTTP/HTTPS/PnPConfiguration via HTTP/HTTPS web
 SNMP, TR069
 Network capture
 NTP/Daylight saving time
 Firmware upgrade via web
 Syslog
 Configuration backup/restore
 Equipment Management System (NMS)
   | Audio HD VoiceWideband Codec: G.722, OPUS-WB
 Narrowband Codec: PCMA, PCMU, G.729, G723, G726, AMR, OPUS, iLBC
 Echo Cancellation/Dynamic Jitter
 Voice Activity Detection (VAD)
 Comfort Noise Generation (CNG)
 Full-duplex Speaker
 Protocols & Standards  SIP v1 (RFC2543), SIP v2 (RFC3261)SIP over TLS, SRTP
 TCP/IP/UDP
 RTP/RTCP, RFC2198, RFC1889
 HTTP/HTTPS/FTP/TFTP
 ARP/RARP/ICMP/NTP/DHCP
 DNS SRV/ A Query/NATPR Query
 STUN, Session Timer (RFC4028)
 DTMF: In-Band, RFC2833, SIP INFO
 LLDP
 OpenVPN, 802.1X
 Physical Features 132×64 pixel graphic LCD with backlightDimensions(approx.): 201x203x42.5mm(WxLxD) without foot stand
 Weight(approx.): device 500g, foot stand 50g
 Input voltage: 5Vdc
 Power supply: 5Vdc power adapter or PoE
 Power consumption: 1.5W
 Handset: 4P4C, RJ9
 Headset: 4P4C, RJ9
 Environmental conditions:
 Operation temperature: 0~40°C
 Humidity: 10% to 95% (non-condensing)
 2xRJ45 10/100M Ethernet Ports
 Wall Mountable
 POE Support C61S – No |