3Com Courier, Reference

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A-6 A
PPENDIX
A: S-R
EGISTERS
0 1 Reset when DTR drops.
1 2 Reverse normal Auto Answer operation:
On incoming RING, enter Originate
Mode and look for an answer tone.
2 4 Disable 250 ms pause before result code
display.
3 8 On DTR signal, autodial the number
stored in NVRAM at position 0 (external
Courier V.Everything modem only).
4 16 At power-on/reset, autodial number
stored in NVRAM at position 0.
5 32 Disable HST (used for testing V.32terbo
in Dual Standard Courier V.Everything
modems).
6 64 Disable MNP Level 3 (used for testing
Level 2).
7 128 Hardware reset (works like powering off
and then on).
S14 1 Bit-mapped register ( See the beginning of this appendix for
information about setting bit-mapped registers).
Bit Value Result
0 1 Disconnect on escape code.
S15 0 Bit-mapped register. ( See the beginning of this appendix for
information about setting bit-mapped registers).
Bit Value Result
0 1 Disable the Courier V.Everything
modem's extra high-frequency
equalisation if it causes problems on
shorter-link calls for HST modulation
only.
1 2 Disable online fallback.
2 4 Disable 450 bps back channel* HST only.
3 8 Reset non-ARQ mode Transmit buffer
from 1.5K bytes to 128.* (for the
convenience of BBS operators taking
calls from remote users of slower
modems).
4 16 Disable MNP Level 4; retransmitting the
larger Level 4 data blocks may be a
problem if you expect a great number of
errors during a call.
Register Default Function