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All above answers are absolutely right

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Posted by sagitraz

T1 is the United States standard, and is also used in Canada and Japan, and carries data at a rate of 1544 kbps

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Posted by grr

Difference between E1(European) & T1(American) is because of data rate.
E1=2.048Mbps
T1=1.544Mbps

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Posted by Hash007

E1 data rate is 2.048Mbps.

WHile

T1 data rate is 1.544Mbps

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Posted by waqqas1

E1 is the European of data rate 2.048 Mbps
T1 is the USA standard of data rate 1.544 Mbp
In Pakistan E1 Standard is used

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Posted by HamidAliKhan

E1 is the European equivalent of a T1 but runs at 2.048Mbps and has 32 64Kbps channels

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Posted by anders