Call management: - Call forwarding: Yes - Call hold: Yes - Call transfer: Yes - Call waiting: Yes - Conference call: Yes - Do not disturb function: Yes - Number of parallel conferences: 3 Design: - Certification: 301 406; EN 50385; RED NB Cert/ANATEL: ANATEL, EAC, UL/CE: EN 55032; EN 55035; EN 61000-3-2; EN 61000-3-3; EN 60950-1; EN 301 489-1/-6; EN/FCC: FCC 15B; FCC 15D; MPE; FCC ID/RCM: AS/NZS 32; AS/NZS 60950.1 - Product colour: Black Operational conditions: - Operating relative humidity (H-H): 10 - 90 - Operating temperature (T-T): -10 - 50 - Storage temperature (T-T): -20 - 60 Performance: - Comfort noise generation (CNG): Yes - Compatible products: Grandstream Networks DP730, DP722, DP720 - Firmware upgradeable: Yes - Maximum range: 400 - Number of handsets supported (max): 5 - Quality of Service (QoS) support: Yes - Security algorithms: 256-bit AES/HTTPS/MD5/SRTP/SSL/TLS - Supported network protocols: SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS (A, SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP-MED, LDAP, TR-069, 802.1x, TLS, SRTP - Voice codecs: AJB/AMR-WB/CNG/G.711alaw/G.711ulaw/G.722/G.722.2/G.723.1/G.726-32/G.729A/G.729B/iLBC/OPUS/PLC/VAD Ports & interfaces: - Ethernet LAN: Yes - Ethernet LAN (RJ-45) ports: 1 Power: - Power over Ethernet (PoE): Yes Vendor information: - Brand Name: Grandstream - Warranty: 1 Weight & dimensions: - Dimensions (WxDxH): 64.98 x 105 x 140.31