Top Definition
Public Switched Telephone Network

PSTN is the oldest, slowest, and most common phone connection based on twisted-pair copper wires carrying analog data. This technology uses RJ-ll connectors. Computers require modems to convert digital signals from the computer to the anlog waveforms that travel across PSTN lines. PSTN phone lines take analog samples of sound 2400 times/second.
Shit man! PSTN sucks.
by James T. Carson April 04, 2006

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt