Attributes

Brand	-
Category	Office Equipment, Supplies & Services / Phone Recording Devices
Origin	-
Brand	Zipei
Model Number	IP1-F
Interface Type	USB 2.0
Detection Method	Polarity Reversal & Soft Off-Hook
Supported OS	Windows 10/11, Linux
Audio Format	WAV, PCM
Sample Rate	8kHz to 48kHz Adjustable
Development Support	SDK included (C++, C#, Java)
Power Supply	USB Bus Powered
Dimensions	75mm x 45mm x 20mm

6 reviews

Anonymous

Mar 24, 2026

Rating: 4/5

Solid hardware, good driver support

Works well on Windows 11. The soft off-hook feature is sensitive but accurate. Would give 5 stars if the Linux examples were more extensive.

Anonymous

Mar 22, 2026

Rating: 5/5

Exactly what was needed for prototyping

Clean audio output and precise event triggering. This kit saved us weeks of building a solution from scratch.

Anonymous

Mar 22, 2026

Rating: 5/5

Reliable for high-volume recording

We deployed ten of these units for our QA team. No dropouts or audio glitches after three months of continuous operation.

Anonymous

Mar 20, 2026

Rating: 5/5

Perfect for custom call logging apps

The SDK documentation is clear and the polarity reversal detection works flawlessly with our legacy PBX system. Integration took less than a day.

Anonymous

Mar 15, 2026

Rating: 3/5

Good but requires coding knowledge

The hardware works fine, but it is definitely a development kit. If you aren't a programmer, you might struggle to set it up without pre-made software.

Anonymous

Mar 10, 2026

Rating: 4/5

Great value for developers

For the price, you get a lot of functionality. The API is straightforward. Just make sure your phone line actually supports polarity reversal.

5 FAQ

Q: Does this device work with VoIP lines or only analog PSTN?

A: The IP1-F is designed specifically for analog PSTN lines to detect polarity reversal. It is not compatible with pure VoIP digital streams without an analog telephone adapter (ATA).

Q: Can this record two calls simultaneously?

A: No, each IP1-F unit handles one phone line. To record multiple lines simultaneously, you need to connect multiple devices to your computer's USB ports.

Q: Do you provide sample code for visual basic?

A: We currently provide samples for C++, C#, and Java. However, since the DLL is standard, it can be imported into Visual Basic .NET projects easily.

Q: Is the SDK compatible with Python?

A: While the native SDK is written for C++ and C#, many users have successfully created Python wrappers using ctypes or SWIG. We do not provide official Python libraries yet.

Q: What happens if my phone line does not support polarity reversal?

A: If polarity reversal is not present, the device can still function using the 'Soft Off-Hook' detection method, which monitors audio energy levels to determine call status, though it may be slightly less precise.

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