Westermo TDW-33 - Manual (Page 13)

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Fn – Select Line Modulation
Supported by: TDW-33 TD-36 TD-36 485 TR-36 TR-36B
This command selects which type of modulation will be used on the phone line. If this
parameter is set to something other than F0, the line speed will be fixed.
(See also the +MS command)
Syntax:
ATF
Parameters:
0: Selects Auto V8 automatically line speed according to the preference of the remote
modem. (Default)
1: Selects 300 bit/s, V.21 (if B0 is set) or Bell 103 (if B1 is set).
2: Selects V.22 600 bit/s
3: Selects V.23 , see %Fn for speed.
4: Selects V.22 (if B0 is set) or Bell 212A (if B1 is set). 1 200 bit/s.
5: Selects V.22bis,.2 400 bit/s,
6: Selects V.32bis 4 800 bit/s or V.32 4 800 bit/s.
7: Selects V.32bis 7 200 bit/s.
8: Selects V.32bis 9 600 bit/s or V.32. 9 600 bit/s.
9 : Selects V.32bis 12 000 bit/s.
10: Selects V.32bis 14 400 bit/s.
14: Selects V.34
15: Auto
Command example Possible responses Note
ATF OK The command is valid
and accepted
ERROR Otherwise