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U.S. Robotics I-modem Command Reference

Appendix A: Alphabetic Command Summary • Page A-35

Bit Value Result

0 1 Disable the I-modem's extra high-frequency equal-

ization if it causes problems on shorter-link calls Ð for

HST modulation only.

1 2 Disable online fallback.

2 4 Disable 450 bps back channel Ð 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.

5 32 Set Backspace key to delete.

6 64 Some earlier 2400 bps MNP I-modems, not made by

U.S. Robotics or Microcom, were not fully compatible

with the MNP protocol

. If you have difÞculty making a

successful 2400 bps MNP connection with a remote

MNP I-modem, it may be because of this incompati-

bility. Set S15 to 64 and try again to make the con-

nection.

Table AÐ1. S-register

s: Their Functions and Default Settings

1 2 ... 237 238 239 240 241 242 243 244 245 246 247 ... 307 308

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US Robotics COURIER Manuale Utente Pagina 242