OnAirDecode DECT cordless phones with an SDR
DECT cordless phones and base stations on the ten carriers 1881.792 - 1897.344 MHz (Europe; 1.152 Mbit/s GFSK, 10 ms frames of 24 slots): every base station from the beacon it sends every frame, with its RFPI (the….
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- DECT cordless phones and base stations on the ten carriers 1881.792…
What DECT cordless phones is
DECT is the cordless phone standard. In Europe its ten carriers run from 1881.792 to 1897.344 MHz.
Frequencies and settings
Carriers 1881.792 - 1897.344 MHz (EU), 5 Msps or more (a radio that reaches 1.9 GHz).
| Tuning range of the mode table | 900 to 1930 MHz |
|---|---|
| Sample rate asked | 5 Msps |
| Lowest working rate | 4.608 Msps |
| Channel width | 1.728 MHz |
OnAir takes any frequency you type; the numbers above are the mode's starting point and the range its table describes. In the app the shortcut label is DECT cordless phones and base stations on the ten carriers 1881.792….
What OnAir shows
Base stations from their beacons: RFPI with the manufacturer code and system number, level, slots used, system-information tails, a burst log with base and handset bursts. Activity and signalling only: calls are encrypted, the voice is not decoded and nothing is sent.
Limits and what it was checked with
Checked with generated signals and impairments; recordings of real signals welcome.
Which radio you need
This mode sits at a high frequency, so check that your radio tunes it: a HackRF covers 1 MHz to 6 GHz, and RTL-SDR stops near 1.7 GHz. Some modes at these frequencies also need a fast radio (10 to 20 Msps) or a dish and an LNB.
Receiving and the law
Questions about DECT cordless phones
Can I decode DECT cordless phones with an RTL-SDR?
No: this mode needs a radio that samples at 4.608 Msps or more, and an RTL-SDR reaches about 2.4 Msps.
Is it legal to receive DECT cordless phones?
This mode is passive. It only receives, never connects, pairs or joins networks, and never decrypts payloads. Check the rules where you live.
Can I try DECT cordless phones in OnAir without a radio?
Yes. Most modes include a built-in synthetic test signal, so you can open the screen and try the controls before you own a radio.