Digital Signal 3

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Digital Signal 3 (DS3 or T3 line) is a digital signal level 3 T-carrier. The data rate for this type of signal is 44.736 Mbit/s (45 Mb). It can transport 28 DS1 level signals within its payload. It can transport 672 DS0 level channels within its payload.^[1]

Such circuits are the usual kind between telephony carriers, both wired and wireless, and typically by OC1^{[citation needed]} optical connections.