HP Poly ATA 400 1FXS Voice Port VoIP Adapter with Open SIP and Power Supply

The POLY ATA 400 1FXS is a compact VoIP adapter that converts a standard analog phone or fax into an IP phone using Open SIP. Supporting codecs G.711alaw and OPUS, it enables reliable voice calls and fax transmission while preserving existing handsets. The device accepts 100–240V AC power and is designed for simple integration into office or home networks without requiring Ethernet or Wi‑Fi for local analog connectivity.

Advantages

The adapter lets you keep your current analog phones and faxes while enabling SIP-based VoIP services, reducing replacement costs and waste. Support for G.711alaw and OPUS codecs ensures compatibility with common VoIP providers and good audio quality. Its small form factor (88 × 88 × 26 mm) and wide input voltage make installation flexible in different environments.

Suitable for

• Small offices and home offices needing VoIP for existing analog phones
• Locations that require fax over IP or analog fax preservation
• Environments where replacing handsets is impractical or costly

Key specifications

• Product: VoIP adapter POLY ATA 400 1FXS
• Protocol: Open SIP
• Voice codecs: G.711alaw, OPUS
• Interface: 1 FXS port for analog phone/fax
• Power supply: 100–240V AC
• Dimensions: 88 mm × 88 mm × 26 mm
• Manufacturer part number (MPN): 8F3H4AA#AC3

How to use

Connect an analog telephone or fax device to the FXS port on the POLY ATA 400 1FXS, plug the adapter into mains power, and configure the device with your SIP account details using the web interface or provisioning method provided by your VoIP service. After registration with the SIP server, make and receive calls through your existing handset as usual. For fax use, enable T.38 or passthrough settings if supported by your service provider.

Recommendations

Place the adapter near the analog device to avoid long analog cabling. Ensure your VoIP provider supports the listed codecs and fax transmission mode you plan to use. Use the device's configuration interface to apply security settings and update firmware when available.