General

• Protocols/Standards: SIP: SIP RFC3261, TCP/IP/UDP, RTP/RTCP, RTCP-XR, TLS, SRTP / Network: IPv4, IPv6, HTTP/HTTPS, ARP, ICMP, DNS(A record, SRV, NAPTR), DHCP, SSH, TFTP, NTP, STUN, LLDP, TR-069, 802.1x
• Network Interfaces One auto-negotiation 10/100 Mbps ethernet port integrated PoE Class 2 
• Wi-Fi(GHP621) integrated dual-band 2.4GHz & 5GHz 802.11 a/b/g/n/ac
• Feature Keys
  23 keys, including 3 programmable keys, 12 Standard Phone Digits keys (0-9: speed dial keys
  configuration on web page, *, #), 5 Function keys (Flash, Redial, Hands-free, Voice Mail, Hold), 3
  Volume Control keys, Up/Down/Mute(with red color LED)
• HD Audio One HD handset support for wide band audio
• Voice Conferencing 2 SIP accounts and lines, up to 3-way conferenc
• Voice Codecs and Capabilities
  Support for G.729A/B, G.711µ/a-law, G.726, G.722 (wide-band), G.723, iLBC, and full band
  OPUS. In- band and out-of-band DTMF (in audio, RFC2833, SIP INFO), VAD, AEC, CNG, PLC, AGC,
  AJB.
• Telephony Features Dial, Answer, Transfer, Conference, Redial, Flash ,Hands-free, Voice Mail (with the server) Hold/
• Advanced Features
  Support for multicast paging and E911 service
  Support for advanced jitter-resilience algorithm
  Supports GDS Door Opening
• Wall Installation 1 Wall Mountable Base
• QoS Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS
• Security
  Secure boot, random default password, unique security certificate per device, administrator
  level passwords, 256-bit AES encrypted configuration file, SRTP, TLS, 802.1x media access
  control
• Multi-language English and Chinese
• Upgrade/Provisioning Firmware upgrade via FTP/TFTP / HTTP / HTTPS, fast boot in 15 seconds, mass provisioning
• Power & Green Energy Efficiency
  Universal power adapter (GHP610W/GHP611W):
  Input: 100~240Vac 50~60Hz
  Output: 12V/0.5A(6W)
• Temperature and Humidity
  Operation: 0°C to 40°C
  Storage: -10°C to 60°C
  Humidity: 10% to 90% (Non-condensing)
• Package Content GHP61X phone, handset with cord, base, universal power supply (GHP621), Quick Installation Guide
• Colour White (GHP621), Black (GHP621)
• Physical
  211mm(L)*53mm(W)*44mm(H) (with handset)
  Unit weight: 300g (GHP621), 350g (GHP621),
  360g (GHP610W/GHP611W World)
  Package weight: 445g (GHP621), 515g (GHP621),
  525g (GHP610W/GHP611W World)
• GHP621 Compliance
  FCC: Part 15 Subpart B, Class B; Part 68. 316/317.
  CE: EN 55032; EN 55035; EN IEC 61000-3-2; EN 61000-3-3; EN IEC 62368-1.
  UKCA: BS EN 55032; BS EN 55035; BS EN IEC 61000-3-2; BS EN 61000-3-3; BS EN 62368-1.
  RCM: AS/NZS CISPR32; AS/NZS 62368.1; AS/CA S004, AS/CA S040.
  IC: ICES-003; CS-03 Part V.