| T-1 |
T-1 is a physical wiring and data protocol standard for transmitting digital information between two discrete points. T-1 is a full-duplex protocol, meaning that it has separate send and receive channels, each operating at 1.544Mbps. T-1 circuits are deemed reliable yet can be relatively expensive. T-1's may provide connectivity to a Network Service Provider, which may use the T-1 to provide Internet connectivity, telephone voice circuits, Frame Relay circuits, and so on. Or, T-1's may be purchased as pure data between two endpoints, over which the customer selects what protocols to run by controlling both endpoints themselves. T-1 was originally developed in the telecommunications industry to transmit circuit-switched voice calls, providing 24 channels of 64kbps voice streams, of which 8kbps per channel were used for signalling (so-called robbed bit signalling). This is why some older T-1 products would often deliver only 56kbps per channel.
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| TM | An abbreviation for Titanium Mirror.
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