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9 definitions found
From The Free On-line Dictionary of Computing (27 SEP 03) : [ foldoc ]
T1
An AT&T term for a digital carrier
facility used to transmit a DS1 formatted digital signal at
1.544 megabits per second.
T1 transmission uses a bipolar Return To Zero alternate
mark inversion line coding scheme to keep the DC carrier
component from saturating the line.
Although some consider T1 signaling obsolete, much equipment
operates at the "T1 rate" and such signals are either
combined for transmission via faster circuits, or
demultiplexed into 64 kilobit per second circuits for
distribution to individual subscribers.
T1 signals can be transported on unshielded twisted pair
telephone lines. The transmitted signal consists of pips of a
few hundred nanoseconds width, each inverted with respect to
the one preceding. At the sending end the signal is 1 volt,
and as received, greater than 0.01 volts. This requires
repeaters about every 6000 feet.
The information is contained in the timing of the signals, not
the polarity. When a long sequence of bits in the transmitted
information would cause no pip to be sent, "{bit stuffing" is
used so the receiving apparatus will not lose track of the
sending clock.
A T1 circuit requires two twisted pair lines, one for each
direction. Some newer equipment uses the two lines at half
the T1 rate and in full-duplex mode; the sent and received
signals are separated at each end by components collectively
called a "hybrid". Although this technique requires more
sophisticated equipment and lowers the line length, an
advantage is that half the sent and half the received
information is mixed on any one line, making low-tech wiretaps
less a threat.
See also Integrated Services Digital Network.
(1994-11-23)
From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002) : [ vera ]
T1
[digital] Transmission link 1 [1.544 Mbit/s] (DS1)
From English Wiktionary: All languages (2023-07-27) : [ dictinfo.com:wikt-en-ALL-2023-07-27 ]
T1
n.
A type of serial line that transmits data at a rate of 1544 (or 1536)
kilobits per second.
From English Wiktionary: English language only (2023-07-27) : [ dictinfo.com:wikt-en-en-2023-07-27 ]
T1
n.
A type of serial line that transmits data at a rate of 1544 (or 1536)
kilobits per second.
From English Wiktionary: Western, Greek, and Slavonic languages only (2023-07-27) : [ dictinfo.com:wikt-en-Western_Greek_Slavonic-2023-07-27 ]
T1
n.
A type of serial line that transmits data at a rate of 1544 (or 1536)
kilobits per second.
From English Wiktionary: Western languages only (2023-07-27) : [ dictinfo.com:wikt-en-Western-2023-07-27 ]
T1
n.
A type of serial line that transmits data at a rate of 1544 (or 1536)
kilobits per second.
From English-Croatian FreeDict Dictionary ver. 0.2.2 : [ freedict:eng-hrv ]
T1 /tˈiː wˈɒn/
kanal PCM kapaciteta 2.048 Mb/s
From français-日本語 (にほんご) FreeDict+WikDict dictionary ver. 2023.05.29 : [ freedict:fra-jpn ]
T1 /te.œ̃/
1Q
From XDICT the English-Chinese dictionary : [ xdict ]
T1
网络名称,(传输率1.54MBPS的计算机骨干网络)
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