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Appendix E - Homologation Testing Command
Homologation Automated Test Options
This command is a special test hook that causes the modem to go off-hook and generate a
continuous signal. In order to enable this command you must first type the command ATS46=0.
The signal that is specified by the AT*HO options is sent over the modem
long as AT*HO is set to a non-0 option. This capability is necessary for measuring the inband
and outband noise condition for each signal.
Spectrums
Spectrums are affected by the transmit level and other options.
DTMF
When DTMF is selected, the modem goes off-hook and generates the digit specified as option 2.
This is a continuous DTMF signal (no off time). It is necessary to characterize the inband and
outband noise.
The AT*HO command takes between 1 and 4 option parameters.
This command has the format:
AT*HOa,b,c,d
where:
a = a parameter 1 option
b = a parameter 2 option
c = a parameter 3 option
d = a parameter 4 option
Examples:
AT*HO1,15,0,1 represents V.21, -15dB, Answer Band, Space
AT*HO12,4 represents DTMF, digit 4
Parameter 1
Parameter 2
(Tx Level)
Option Description
0
Normal
1
V.21
9 to 20
2
Bell 103
9 to 20
3
V.23
9 to 20
Parameter 3
Option Description
Option Description
-9 to -20 dB
0
1
-9 to -20 dB
0
1
-9 to -20dB
0
1
2
line interface as
Parameter 4
Optio
Answer Band
0
Originate Band
1
Answer Band
0
Originate Band
1
Forward (1200)
0
Forward (600)
1
Backward (75)
2
Description
n
Mark
Space
Mark
Space
Binary 1
Binary 0
Pattern