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Grandstream ATA-503


The HandyTone 503 is the next generation of powerful ( improves the characteristics of the old model ATA-488 ) , affordable, high quality and manageable IP telephony ATA/IAD for residential users and road-warriors. Its compact size, excellent voice quality, packed feature functionality and best-in-class price-performance point enable consumers to maximize the power of IP voice and data connectivity. The HandyTone 503 is based on SIP standard and interoperable with most 3rd party SIP compliant devices and software. It features 1 FXS telephone port, 1 FXO PSTN line port, dual 10M/100Mbps network ports, port status and message waiting LED, and a base stand for vertical positioning.


  • 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
    • flexible dial plan, direct IP calling
  • 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


  • 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
Esempio di una tipica applicazione dell'HandyTone-503
Ethernet Ports 2 RJ45 (LAN/WAN)
NAT/Router Yes
DHCP Client/Server
FXS Port 1
FXO Port 1
PSTN Pass-through Port Yes
Voice Mail Indicator Yes
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


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


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

NAT router

Yes, can operate in NAT Router or Switched Mode

Network Protocols



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 &


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


Operational: 32°–104°F or 0°–40°C

Storage: 10°–130°F

Humidity: 10–90% Non-condensing

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



FCC/CE, EN55022/EN55024 and FCC part15 Class B




Da inserire:

  • Modello: ATA-503
  • 0 disponibilità in magazzino
  • Prodotto da: Grandstream

Prodotto inserito in catalogo lunedì 07 settembre, 2009.

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