Grandstream Networks HandyTone 503 FXS FXO VoIP Adapter

Priced: $49.99
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Grandstream Networks HandyTone 503 FXS FXO VoIP Adapter -

The Grandstream HandyTone 503 FXS FXO VoIP Adapter offers the next generation of powerful, affordable, high quality and manageable IP telephony ATA/IAD. The integration of a FXO and FXS port enables remote call origination and termination to and from the PSTN line, known as "hop-on and hop-off" calling. This functionality coupled with its compact size makes it an ideal solution for road warriors seeking the savings and benefits of voice-over-ip communication.

Lining and Layers:

  • Status LED for power, telephone, PSTN line, network and message waiting indication
  • 1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with power-outage life line support


  • Web management for easy configuration and installation


  • Comprehensive voice codecs
  • Portable and compact for use at home or on the road
  • Up to 2 SIP account profiles, SIP over TCP/TLS, SRTP
  • Hop-on/Hop-off calling
  • Offers traditional and advanced telephony features
  • IP connectivity for any phone and fax
  • Dual 10/100 Mbps network ports (RJ45) with integrated high performance NAT router
  • Secure and automated provisioning using HTTP/HTTPS/Telnet/TFTP
  • T.38 Fax
  • Symmetric and asymmetric voice codec/RTP in any call sessions
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Caller ID:REN3: Up to150 ft on 24 AWG line
DHCP Server / Client NAT router:Yes, can operate in NAT Router or Switched Mode
DTMF Method:RFC2833 and/or SIP INFO
Dimensions (HxWxD):25x115x75mm / 0.98x4.53x2.95" when laying flat 115x25x75mm / 4.53x0.98x2.95" standing up
EMC:FCC/CE, EN55022/EN55024 and FCC part15 Class B
Environmental:Operational: 32deg.-104deg.F or 0deg.-40deg.C Storage: 10deg.-130deg.F Humidity: 10-90% Non-condensing
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
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
LED Indicators:Power, WAN, LAN, PHONE and LINE
Network Interfaces:Two (2) 10M/100 Mbps ports (RJ-45) with integrated NAT router
Polarity Reversal / Wink:Yes
Provisioning & Management:TFTP, HTTP, HTTPS, Telnet, secure and automated provisioning system for large deployment, syslog
QoS:Support Layer 2 (802.1Q VLAN, 802.1p), Layer 3 QoS (ToS, DiffServ) QoS
RESET Button:Factory Reset Button
Short and long haul:Bellcore Type 1 & 2, ETSI, BT, NTT and DTMF-based CID
Telephone Interfaces:1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with lifeline support Two (2) 10M/100 Mbps ports (RJ45) with integrated Nat router
Universal Power Supply:Output: 12VDC, 0.5A Input: 100-240 VAC, 50-60 Hz
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

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