Grandstream HandyTone HT503

• 1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with power-outage life line support,
• Up to 2 SIP account profiles, SIP over TCP/TLS, SRTP
• Dual 10/100 Mbps network ports (RJ45) with integrated high performance NAT router
• Status LED for power, telephone, PSTN line, network, and message waiting indication
• Advanced telephony features
  • caller ID from both IP and PSTN,
  • call waiting, 3-way conference with IP and/or PSTN,
  • remote call origination and termination from/to PSTN,
  • hop-on and hop-off calling,
  • transfer to OR forward to IP or PSTN,
  • do not disturb,
  • message waiting indication,
  • multi-language voice prompts,
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  • flexible dial plan, direct IP calling
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• Comprehensive voice codecs
• Secure and automated provisioning using HTTP/HTTPS/Telnet/TFTP
• Symmetric and asymmetric voice codec/RTP in any call sessions
• T.38 Fax

• SIP over TCP/TLS

Benefits

• IP connectivity for any phone and fax
• Hop-on/Hop-off calling
• Web management for easy configuration and installation
• Offers traditional and advanced telephony features
• Portable and compact for use at home or on the road

• Ethernet Ports: 2 RJ45 (LAN/WAN)
• NAT/Router    
• DHCP: Client/Server
• FXS Port: 1
• FXO Port: 1
• PSTN Pass-through Port   
• Voice Mail Indicator  
• Voice Codec: G.711(a/u-law), G.723.1, G.729A/B/E, G.726-40/32/24/16 and iLBC, T.38 fax
• Remote Configuration: HTTP/HTTPS/Telnet/TFTP Provisioning

Technical Specifications

• Telephone Interfaces: 1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with lifeline support
• Network Interfaces: Two (2) 10M/100 Mbps ports (RJ-45) with integrated NAT router
• LED Indicators: Power, WAN, LAN, PHONE and LINE
• Reset Button: Factory reset button
• Telephony Features: caller ID display or block, call waiting wither caller ID, flash, blind or attended call transfer, hold, call forward, do not disturb, 3-way conferencing
• Voice Codec: G.711 Annex I (PLC) and Annex II (VAD/CNG format), G.723.1A, G.729A/B/E, G.726-40/32/24/16, iLBC
• Voice over Packet:Capabilities
• Voice Activity Detection (VAD) with Comfort Noise Generation (CNG) and Packet Loss Concealment (PLC), Dynamic Jitter Buffer, G.168 compliant Line Echo Cancellation
• Fax over IP: T.38 compliant Group 3 Fax Relay up to 14.4kpbs, Fax Datapump V.17, V.19, V.27ter, V.29 for T.38 fax relay
• DHCP Server/Client: can operate in NAT Router or Switched Mode

NAT router    

• Network Protocols: TCP/UDP/IP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, PPPoE, STUN
• QoS: Support Layer 2 (802.1Q VLAN, 802.1p), Layer 3 QoS (ToS, DiffServ) QoS
• IP Signaling: SIP (RFC 3261), SIP over TCP/TLS, SRTP, up to 2 SIP account profiles, symmetric and asymmetric RTP/codec in any call sessions
• DTMF Method: RFC2833, and/or SIP INFO
• Provisioning & Management: TFTP, HTTP, HTTPS, Telnet, secure and automated provisioning system for large deployment, syslog
• Universal Power Supply: Output: 12VDC, 0.5A;       Input: 100–240 VAC, 50-60 Hz

Environmental: 

• Operational: 32°–104°F or 0°–40°C   
• Storage: 10°–130°F
• Humidity: 10–90% Non-condensing
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Dimensions (H x W x D)

• 25mm x 115mm x 75mm (when laying flat);
• 115mm x 25mm x 75mm (standing up)
• Short and long haul: REN3: Up to150 ft on  24 AWG line
• Caller ID:Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
• Polarity Reversal/Wink