T-Series Connections
The basic, entry level in bandwidth or speed for leased lines that provide synchronous connections between sites is known as the T1. It serves up 24 Digital Signal 0 (DS0) 64 Kbps channels in the United States, Japan, and South Korea. There’s a slightly bigger/faster version with 32 DS0 channels that’s available in Europe and called the E1 or E carrier line.
T1s use Digital Signal 1 (DS1) bit patterns to transmit packets; DS1 has to do with the service to be sent over a T1—originally, 24 digitized voice channels. The terms T1 and DS1 have become synonymous and include a bunch of different services from voice to data to clear-channel pipes. The line speed is always consistent at 1.544 Mbps (millions of bits per second), but the payload can vary greatly. For trivia lovers, T1 came from the carrier letter or part number assigned by AT&T to the technology.
But That Doesn’t Add Up!
Twenty-four of these channels are a composite of 1.536...
