HP OmniBook XE Reference Manual page 4

%Tn
PTT Testing of Signal Level
%TT00_%TT09 Dual Tone Multifrequency ( DTMF ) tone dial digits 0 to 9
%TT0A DTMF digit *
%TT0B DTMF digit #
%TT0C DTMF digit A
%TT0D DTMF digit B
%TT0E DTMF digit C
%TT0F DTMF digit D
%TT10 V.21 Channel 1mark ( originate ) symbol.
%TT11 V.21 Channel 2mark symbol.
%TT15 V.22 originate signaling at 1200 bps
%TT16 V.22 bis originate signaling at 2400 bps
%TT17 V.22 answering signaling ( guard tone if PTT required).
%TT18 V.22 bis answer signaling (guard tone if required )
%TT19 V.21 Channel 1sapce symbol.
%TT1A V.21 Channel 2 space symbol.
%TT20 V.32 9600 bps.
%TT21 V.32 bis 14400 bps.
%TT30 Silence, i.e. Go off-hook.
%TT31 V.25 answer tone
%TT32 1800Hz guard tone
%TT33 V.25 calling tone ( 1300 Hz )
%TT34 Fax calling tone ( 1100 Hz )
%TT40 V.21 channel 2
%TT41 V.27 ter 2400 bps
%TT42 V.27 ter 4800 bps
%TT43 V.29 7200 bps
%TT44 V.29 9600 bps
%TT45 V.17 7200 bps long train
%TT46 V.17 7200 bps short train
%TT47 V.17 9600 bps long train
0 USA
1 Japan
2 Germany
3 UK(CTR-21)
4 France
5 Austria
6 Italy
7 Australia
8 Sweden
9 Denmark
10 New Zealand
11 Korea
12 China
13 Singapore
14 Malaysia
15 South Africa
16 Poland
17 Czechoslovakia
18 Hungary
19 Hong Kong
20 Turkey
21 Spain