ATA-171/172/171P Series products are internet analog telephone adapters. Customers can connect ordinary conventional telephones, especially suitable for home or small users, and enjoy internet telephone system without changing their original dialing habits. Its built-in dual network ports and NAT function allow users to connect to the Internet while using internet telephones without additional real IP. ATA-171/172 provide one-port and two-port FXS voice modules respectively, and ATA-171P provides one-port FXS voice module in addition to one backup PSTN port. When network problems occur, ATA-171P will automatically switch to PSTN line to ensure that the phone can be unimpeded at any time. Users can also manually choose to dial the phone by PSTN line or internet. ATA-171/172/171P adopts standard SIP protocol, easy to install and maintain, and applicable to various broadband network applications. It is the most effective telephone cost-saving tool.
The ATA‑171, ATA‑172 and ATA‑171P are analog telephone adapters designed for home or small‑office use. They support standard SIP protocols, include built‑in Ethernet ports with NAT, and allow simultaneous Internet access and VoIP calls without additional hardware. The ATA‑171P adds a backup PSTN port that automatically switches when the network fails.
The manual describes the hardware interfaces (two RJ‑45 Ethernet ports, one or two RJ‑11 FXS ports, and a PSTN port on the 171P), power requirements (110‑240 V AC, 50/60 Hz), environmental limits, supported voice codecs (G.711, G.726, G.729A/B), and network features such as STUN, UPnP, proxy, DHCP, PPPoE, Telnet, HTTP, and DNS. It also lists telephone functions like call waiting, transfer, hold, and DTMF tones. This manual is written in Chinese.
| Dimensions | 9.9 × 9.9 × 3.2 cm |
|---|---|
| Ethernet Ports | 2 RJ‑45 ports |
| PSTN Backup Port | Present on ATA‑171P |
It has two RJ‑45 Ethernet ports for network connection.
Yes, the ATA‑171P has an additional PSTN backup port that switches automatically when the network fails.