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How fast is my modem connecting?
When a user looks at their connection speed, they may see one of two
things.
Either the speed that their modem is talking to the other modem (DCE)
or the speed their computer is talking to their modem (DTE).
Unfortunately many modems will report the modem to computer speed
which is not very useful. If a speed of 38400, 57600 or 115200 is
being shown, this is the modem to computer speed and tells nothing
about how fast the modems are actually communicating at.
The modem to computer speed should always be quicker than the modem
to modem speed. If 19200 is shown then this can be either the modem
to modem or the computer to modem speed as this is a valid speed for
either one. Otherwise the speed shown will be the initial connection
speed. End users can not see what speeds their modems change to
during a call.
Valid speeds for V.34 connections are:
300, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 24000,
26400, 28800, 31200, 33600
Valid speeds for K56Flex connections are:
32000, 34000, 36000, 38000, 40000, 42000, 44000, 46000, 48000, 50000,
52000, 54000, 56000
Valid speeds for V.90 connections are:
28000, 29333, 30666, 32000, 33333, 34666, 36000, 37333, 38666, 40000,
41333, 42666, 44000, 45333, 46666, 48000, 49333, 50666, 52000, 53333,
54666, 56000.
Using the above, it is sometimes possible to tell which protocol is
being used by the speed. For example, a 49333 connection would have
to use the V.90 protocol. A 32000 connection would be K56Flex or V.90
but not V.34.
A user service from Connect.ie, free to copy, free to use, please notate source.