bits/second:
-------------------------------
10baseT	(10 meg)    10,000,000	
100baseT(100 meg)  100,000,000	
1000baseT(1 gig) 1,000,000,000	

   T1  (1.544 Mb)    1,544,000
   T2  (4 T1's)      6,312,000
   T3  (28 T1's)    44,736,000

   DS 0 (64 k)          64,000
   DS 1 (1.544 Mb)   1,544,000 (1.5 Meg)
   DS 2  (4 DS 1's)  6,312,000 (6.3 Meg)
   DS 3 (28 DS 1's) 44,736,000 (45 Meg)