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121 T1
"A U.S. telephone standard for a transmission facility at digital signal level 1 (DS1) with 1.544 megabits per second in North America and 2.048 megabits per second in Europe. The bit rate is the equivalent bandwidth of approximately twenty-four 56-kilobits-per-second lines. A T1 circuit is capable of serving a minimum of 48 modems at 28.8 kilobits per second or 96 modems at 14.4 kilobits per second. T1 circuits are also used for voice telephone connections. A single T1 line carries 24 telephone connections with 24 telephone numbers. When it is used for voice transmission, a T1 connection must be split into 24 separate circuits."T1 -
122 Transmission Level 1
"A U.S. telephone standard for a transmission facility at digital signal level 1 (DS1) with 1.544 megabits per second in North America and 2.048 megabits per second in Europe. The bit rate is the equivalent bandwidth of approximately twenty-four 56-kilobits-per-second lines. A T1 circuit is capable of serving a minimum of 48 modems at 28.8 kilobits per second or 96 modems at 14.4 kilobits per second. T1 circuits are also used for voice telephone connections. A single T1 line carries 24 telephone connections with 24 telephone numbers. When it is used for voice transmission, a T1 connection must be split into 24 separate circuits." -
123 T3
"A U.S. telephone standard for a transmission facility at digital signal level 3 (DS3). T3 is equivalent in bandwidth to 28 T1s, and the bit rate is 44.736 megabits per second. T3 is sometimes called a 45-meg circuit."T3 -
124 Transmission Level 3
"A U.S. telephone standard for a transmission facility at digital signal level 3 (DS3). T3 is equivalent in bandwidth to 28 T1s, and the bit rate is 44.736 megabits per second. T3 is sometimes called a 45-meg circuit." -
125 blind via
A copper-plated hole in a printed circuit board that does not extend all the way thru a PCB. This prevents probing a component's signal pin by removing access to the via on the opposite side of the board. -
126 EEPROM
"A type of EPROM that can be erased with an electrical signal. It is useful for stable storage for long periods without electricity while still allowing reprogramming. EEPROMs contain less memory than RAM, take longer to reprogram, and can be reprogrammed only a limited number of times before wearing out." -
127 electrically erasable programmable read-only memory
"A type of EPROM that can be erased with an electrical signal. It is useful for stable storage for long periods without electricity while still allowing reprogramming. EEPROMs contain less memory than RAM, take longer to reprogram, and can be reprogrammed only a limited number of times before wearing out."ذاكرة للقراءة فقط مبرمجة يمكن مسحها كهربياً (EEPROM)English-Arabic terms dictionary > electrically erasable programmable read-only memory
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128 audio waveform
A visual representation of an audio signal over time.
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signal — sub. m. Signe que l on donne pour servir d advertissement. Faire un signal. donner le signal. à ce signal ils mirent tous l espée à la main. ils tirerent trois coups de canon pour signal. On leur fit plusieurs signaux. ils firent les signaux dont … Dictionnaire de l'Académie française
