2. Each user with a dedicated 1mbps line.
T1 line
1.5 Mbps www.intelletrace.com
The E1 has a greater line capacity. E1 is the European standard and runs at 2.084 Mbps. The American T-1 standard runs at a capacity of 1.544 Mbps.
T1 line
A leased line with a bandwidth of 2 Mbps (megabits per second) provides a dedicated and consistent download speed of up to 2 Mbps for data transfer. This means that users can expect to download data at a rate of 2 megabits per second under optimal conditions. However, actual speeds may vary slightly due to factors like network congestion or equipment limitations.
That will depend A LOT on what the users want to do. For instance, if you read a mainly-text website (for example: Wikipedia), and only open a new page every few minutes, you use so little bandwidth that you can probably support HUNDREDS of such users on 2 Mbps.On the other extreme, if each and every user is watching movies, they use a fairly large bandwidth - and you can only support a few users. Here are some reference values which I found for typical YouTube movies - I am not sure how accurate they are, and the actual bandwidth can DEFINITELY vary: 480p: 1 Mbps 360p: 0.5 Mbps 240p: 0.25 Mbps So, according to these numbers, if just TWO users watch YouTube videos at 480p (which is a fairly decent quality, but still LESS than HD), they will use up the entire bandwidth.
A T3 line can carry 28 T1 lines. Each T1 line has a data rate of 1.544 Mbps, while a T3 line has a data rate of 44.736 Mbps. Therefore, a T3 line aggregates the bandwidth of these 28 T1 lines to provide higher capacity.
T3 is 44.736 Mbps (megabytes per second) both ways.
Digital Subciber Line
appale
In North American a T1 line carries signals at 1.544 Mbps (24 channels at 64Kbps). E1 is the European format for digital transmission. E1 carries signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling). T1 and E1 lines may be interconnected for international use.