US Robotics COURIER - Page 127

COURIER HIGH SPEED MODEMS
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Register Default Function
S16 0 Bit-mapped test register. To set the
register, see
the instructions for S13. For
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information on testing, see Appendix F.
Bit Value Result
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0 1 Analog Loopback
1
2 Dial test
2 4 Test
pattern
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3 8 Remote Digital Loopback
4
16 Reserved
5
32
Reserved
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6
64 Reserved
S17
0 Reserved.
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S18
0
Test timer for software-initiated loopback
testing
(&Tn), disabled when S18 is set to 0.
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See Appendix F. Used to set the duration
of testing, in seconds, before the modem
automatically times out and terminates the
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test.
S19
0 Sets the duration, in minutes, for the
Inactivity Timer. The timer activates when
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there is no data activity on the phone line
and at the timeout the modem hangs up.
Sl 9=0 disables the timer.
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S20
0
Reserved.
S21 10 Sets, in 10-millisecond units, the length of
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Breaks sent from the modem to the DTE.
Applies to ARQ
mode only.
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S22 17
Stores
the ASCII decimal code for the XON
character.
523
19 Stores the ASCII decimal code for the
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XOFF character.
S24 150
Sets the duration, in 20-millisecond units,
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between pulsed DSR signals when the
modem is set to &S2 or &S3. The default is
3 seconds.
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8-16 Summaries and Tables
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