“We received quite a few quotes within hours, and have already made our decision to go with AT&T. In the future we may be looking at going multi carrier (Few T1's here, a few T1's there) for redundancy, and T1 Shopper will be the first place I look!”
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Digital Signal Level 3 (DS3) is a term coined by AT&T to describe a digital transmission line framing 28 DS1 lines or 672 separate 64 kbps channels into one communications path. A DS3 line provides a conduit for any combination of data, voice or video applications. The versatility of DS3 makes it ideal for data-intensive users with large backbone applications or private networks requiring channelized transport.
T3 and DS3 are used interchangeably. To our knowledge, there are no authoritative publications technically defining the two terms although it may be acknowledged that a "DS-3" refers to the format of transmission (framing) and "T3" refers to the type of connection and the facility used in transmitting the signal.