RoHS Comply

Key Benefits

  • Home use for VoIP Service provider
  • Built-in SOHO router lite function
  • Support T.38 FAX Transmission
  • Voice prompt and web configuration capability


ATA-17X series contain four models of gateway products: ATA-171, ATA-172,
ATA-171P, ATA-171M. With outstanding design and dazzling appearance,
Welltech ATA-17X series satisfy all users and meet their different requirements.
ATA-171/172 is one/two port analog telephony adapter, and user can connect
with one/two analog phone set to enjoy VoIP calls.

ATA-171P is one-port analog telephone adapter plus one PSTN backup life line,
which allows user to dial and receive PSTN or VoIP call in one identical phone



Physical interface
  1. RJ-45
    A. WAN X 1 for connecting to HUB or ATU-R directly
    B. LAN X 1 for PC connection

  2. RJ-11
    A. Phone X 1 for ATA-171
    B. Phone X 2 for ATA-172
    C. Phone X 1, Line X 1 for ATA-171P/ATA-171M

  3. Dimension: 9.9 X 9.9 X 3.2 cm
Network and
  • SIP v1(RFC2543), v2(RFC 3261)
    • Outbound proxy
    • Support backup proxy registration
    • Support IP or domain name for primary and
      secondary proxy address and auto switching
      is enabled
  • TFTP Client/DHCP Client/PPPoE Client
  • Telnet/HTTP Server
  • DHCP Server for LAN Port
  • NAT traversal
    • STUN
  • Support ToS
  • Security
    • HTTP 1.1 basic/digest authentication for Web
    • MD5 for SIP authentication
Voice feature
  • Voice codec
    • G.711 : 64k bit/s (PCM)
    • G.726 : 16k/24k/32l/40k bit/s (ADPCM)
    • G.729A : 8k bit/s (CS-ACELP)
    • G.729B : adds VAD & CNG to G.729
  • VAD : Voice activity detection
  • CNG : Comfortable noise generation
  • LEC : Line echo canceller
  • Packet Loss Compensation
  • DTMF
    • In-Band DTMF
    • Out-Band DTMF
    • SIP Info
  • Tone generation
    • Ring Tone
    • Ring Back Tone
    • Dial Tone
    • Busy Tone
    • Programming Tone
Call function
  • Call Hold
  • Call Waiting
  • Call Forward
  • Caller ID
  • Flash
  • Volume Adjustment
  • Speed dial key
  • Phone book
  • Call Transfer between FXS, FXO and IP port (ATA-
    171M only)
  • Call Forwarding between FXS, FXO and IP port (ATA-
    171M only)
Firmware and
  • Web Browser
  • Telnet
  • Voice configuration
  • TFTP
  • HTTP
  • AC Power
    • 100~240 Input 12V dc/output
  • Environment
    • Temperature : 0°C~40°C
    • Humidity : 10%~90%RH
Order Information
Interface Specification
ATA-171 One Port FXS Champagne Gold
ATA-172 Two Port FXS Pearl White
ATA-171P One Port FXS + One PSTN backup
line Port
Metal Blue
ATA-171M One FXS + One FXO Metal Purple

* RoHS Compliant

Application Diagram

Copyright © 2005. WELLTECH TECHNOLOGY CO., LTD. All Rights Reserved.