Grand Idea Studio

POCSAG Pager Decoder


The POCSAG Decoder allows off-the-air decoding of pager and Mobitex data traffic when used in conjunction with the proper software. Both numeric and alphanumeric messages will be decoded, as well as an optional hex dump of raw POCSAG codewords.

The POCSAG Decoder circuit board is only 1 inch x 1 inch, uses standard size components, and fits inside a DB25 connector hood. The device is powered via a PC-compatible serial port and requires input from the speaker or discriminator output from a radio scanner.

The most common paging frequencies are located at the 931MHz band, but POCSAG transmissions can also be heard on the 35Mhz, 43Mhz, 152Mhz, and 454MHz bands. Specific frequencies depend on location and can be found in any scanner guide.

The POCSAG Decoder was originally released and sold on the L0pht Heavy Industries website. It is no longer available for sale.

Schematic: POCSAG Pager Decoder


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