32
Action
tec External 56K/V92 Modem User Manual
H0
Hangs up the telephone line*
H1
Picks up the telephone line
Ln
Speaker volume
L0
Off or low speaker volume
L1
Low volume
L2
Medium volume*
L3
High volume
ITU–T V.90 Operation Commands
Three S-registers support K56flex, V.90, and V.34 connections. The S37 register is
used to control the upstream V.34 rate. The S38 register is used to control the maxi-
mum downstream speed at which the Modem attempts to connect. To disable V.90,
set S38 to
0
. The S109 register is used to select between K56flex and V.90 protocols.
Dial Line Rate (S37)
S37 = 0
maximum modem speed*
S37 = 1
reserved
S37 = 2
1200 bits/s and 75 bits/s
S37 = 3
300 bits/s
S37 = 4
reserved
S37 = 5
1200 bits/s
S37 = 6
2400 bits/s
S37 = 7
4800 bits/s
S37 = 8
7200 bits/s
S37 = 9
9600 bits/s
S37 = 10
12000 bits/s
S37 = 11
14400 bits/s