Intel MD566X User Manual
Page 66
56K V.92 Data, Fax, and Voice Chipset
66
Intel Confidential
Programmer’s Guide
Table 4-2.
V.44 / V.42 / V.42 bis and MNP Data Mode Command Descriptions
Note:
An asterisk (*) denotes the factory-default setting.
Command
Default
Description
%An
13
Set Auto-Reliable Fallback Character: In auto-reliable mode (\N3) with auto-reli-
able fallback character enabled (\C2), receipt of the fallback character from the line
during the V.42 detection phase causes the modem to switch to buffer (normal)
mode. This allows a remote user with a non-V.42 modem to connect immediately
with a V.42 modem. A space or carriage return is usually chosen for the fallback
character.
n = 0–127 (ASCII character)
%Cn
1
MNP 5 Data Compression Control: This command controls whether the data sent
during the MNP frames is compressed using MNP Class 5 compression standard.
MNP 5 data compression can improve throughput by as much as 150%.
n = 0, 1
n = 0
No compression
n = 1*
MNP Class 5 compression
\An
3
MNP Block Size: This command specifies the maximum number of data bytes in an
MNP data frame. A smaller frame size may improve throughput on high-impairment
(noisy) telephone lines.
n = 0–3
n = 0
Maximum 64 characters
n = 1
Maximum 128 characters
n = 2
Maximum 192 characters
n = 3*
Maximum 256 characters
\Bn
none
Transmit Break: This command causes the modem to send a break (attention sig-
nal) to the remote modem for a duration specified by ‘n’. When n = 0, the default
break length is used.
n = 0–9 (units of 100 ms)