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View Full Version : Data Transfer & Bandwidth


Bob Biddy
02-12-2002, 05:05 PM
Since I'm new here can someone explain how to convert data transfer speed into bandwidth?

We're looking at putting a server at an offsite facility and they want to charge us by the Kbps (kilo bits er second?). Is this normal? We also have the option of getting a capped connection but it is more expensive at first.

What are some fair prices for Kbps?

Lots of great info here!!!

hypernatic.net
02-12-2002, 05:07 PM
CONNECTION SPEED Daily Traffic
ISDN1 / DS-0 64 Kb/sec 559.96Mb
ISDN2 128 Kb/sec 1.106Gb
2way Satellite upload 150 Kb/sec 1.296Gb
Fixed Wireless upload 256 Kb/sec 2.211Gb
G.lite ADSL upload 384 Kb/sec 3.318Gb
2way Satellite download 500 Kb/sec 4.320Gb
ADSL upload 768 Kb/sec 6.637Gb
G.lite ADSL download 1.5 Mb/sec 12.960Gb
T1 / DS1 1.544 Mb/sec 13.340Gb
E1 / DS1 2.048 Mb/sec 17.695Gb
Fixed Wireless download 5 Mb/sec 43.200Gb
ADSL download 6.144 Mb/sec 53.084Gb
T2 / DS2 6.312 Mb/sec 54.536Gb
E2 8.448 Mb/sec 72.991Gb
Cable upload 10 Mb/sec 86.400Gb
Cable download 27 Mb/sec 233.280Gb
E3 34.368 Mb/sec 296.939Gb
T3 / DS3 44.736 Mb/sec 386.519Gb
OC1 51.48 Mb/sec 444.787Gb
OC3 155.52 Mb/sec 1.344Tb
T4 / DS4 274.76 Mb/sec 2.374Tb
OC9 466.56 Mb/sec 4.031Tb
OC12 622.08 Mb/sec 5.375Tb
OC18 933.12 Mb/sec 8.062Tb
OC24 1.244 Gb/sec 10.748Tb
OC36 1.866 Gb/sec 16.122Tb
OC48 2.488 Gb/sec 21.496Tb
OC96 4.976 Gb/sec 42.993Tb
OC192 9.952 Gb/sec 85.968Tb
OC255 13.271 Gb/sec 114.661Tb
OC768 39,813 Gb/sec 343.984Tb

webinfo
02-13-2002, 10:09 AM
Not sure if this is what you are after but here goes.....


Mbits equal 1 million bits
1 Byte = 8 bits
KB = 1024 bytes
MB = 1,000,000 bytes
GB = 1,000,000,000 bytes

To calculate how much data
you can transfer with 1mbit
using 100% data usage.

Per second 1mbit/8=125kb
Per minute 60x125kb=7.5mb
Per hour 60x7.5mb=450mb
Per day 24x450mb = 10.8gb
Per month 30x10.8 = 324gb

YOU COULD TRANSFER
UP TO 324GB PER
MONTH PROVIDED YOU
USED 100% CAPACITY
OR 162GB IF USED 50%

hypernatic.net
02-13-2002, 10:13 AM
Originally posted by webinfo
Not sure if this is what you are after but here goes.....


Mbits equal 1 million bits
1 Byte = 8 bits
KB = 1024 bytes
MB = 1,000,000 bytes
GB = 1,000,000,000 bytes


Incorrect.

1MB = 1024^2 = 1024*1024 = 1048576 bytes
1GB = 1048576 * 1024 = 1099511627776 bytes

also, in my table above you can see:
T1 / DS1 1.544 Mb/sec 13.340Gb

13.34 a day, equals (*30) = 400,2gb

dektong
02-13-2002, 10:49 AM
.

webinfo
02-13-2002, 12:48 PM
ok I was rounding it down a little ... lol but the calc is there ....

hypernatic.net
02-13-2002, 12:50 PM
Originally posted by webinfo
ok I was rounding it down a little ... lol but the calc is there ....

Don't you think 76,2 GB a month isn't a little too much to just "forget"...? :)

webinfo
02-13-2002, 01:04 PM
Its always better t round it down .... best be on the safe side .....
;) LOL

I nicked this from a uk2 website.... just pasted it here to assist...

dektong
02-13-2002, 01:16 PM
Originally posted by hypernatic.net
also, in my table above you can see:
T1 / DS1 1.544 Mb/sec 13.340Gb

13.34 a day, equals (*30) = 400,2gb

Dear Sir, I would bet your calculation is wrong.

We know that 1 mbps (not a T1) can push around 320GB/mo
and hence, a 1.5 mbps (roughly a T1) can push around 1.5x320GB/mo or about 480GB/mo

The difference of 80GB/mo isn't a little too much to just "forget" .. ? :)

cheers,
:beer:

hypernatic.net
02-13-2002, 01:21 PM
Hmm the table seems to be off :)

You're right...

1.544/8*60*60*24*30/1024=16,284375GB per day

epgs
02-13-2002, 02:36 PM
yes it is

hypernatic.net
02-13-2002, 02:38 PM
Originally posted by epgs
yes it is

Just wondering... What is this post good for? :D

bombino
02-13-2002, 07:16 PM
If you use MRTG Average bandwidth numbers, a 128 kbit monthly average is about ~40 gigs of transfer per month. Multiply as needed.