US Robotics 56K MESSAGE MODEM - QUICK FOR WINDOWS Guide de l'utilisateur télécharger pdf (Page 88)

TECHNICAL REFERENCE

S22 17 Stores the ASCII decimal code for the Xon character

S23 19 Stores the ASCII decimal code for the Xoff character

S24 0 Reserved

S25 20 Sets the duration, in hundredths of a second, that DTR must be dropped so that the modem

does not interpret a random glitch as a DTR loss

Most users will want to use the default

This register is useful for setting compatibility with older systems running under older

operating software

S26 0 Reserved

S27 0 Bit-mapped register setup

To set the register, see instructions for S13

Bit Value Result

0 1 Enables ITU-T V.21 modulation at 300 bps for overseas calls; in V.21

mode, the modem answers both overseas and domestic (U.S. and Canada)

calls, but only originates V.21 calls

Default is Bell 103

1 2 Enables unencoded (non-trellis coded) modulation in V.32 mode

2 4 Disables V.32 modulation

3 8 Disables 2100 Hz answer tone to allow two V.42 modems to connect faster

4 16 Enables V.23 fallback mode

5 32 Disables V.32 bis mode

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 99 100

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US Robotics 56K MESSAGE MODEM - QUICK FOR WINDOWS Guide de l'utilisateur Page 88