Specifications

August 26, 2004 TechMemo 01-0011B
22 of 24
Bit-mapped registers
To set a bit-mapped register, select the bit(s) you want on and set the register (for example, S13) to the total of
the values in the Value column. For example, ATS13 = 17 enables bit 0 (value is 1) plus bit 4 (value is 16) = 1 + 16.
Settings for S13
Settings for S15
S28
0 Eliminates the V.32 answer tones for a faster connection.
8 Default item, all times are in tenths of seconds.
255 Disables all connections except V.32 at 9600 bps.
S29 20 Sets the duration, in tenths of a second, of the V.21 answer mode fallback timer.
S30 0 Reserved.
S31 128 Reserved.
S32 2
Bit-mapped register setup. To set this register, see the instructions for S13 (“Settings for S13” on
page 22).
S33 0
Bit-mapped register setup. To set this register, see the instructions for S13 (“Settings for S13” on
page 22).
S34 0 Reserved.
S35 0 Reserved.
S36 0 Reserved.
S37 0 Reserved.
S38 0
Sets an optional delay, in seconds, before a forced hang-up and clearing of the Transmit buffer when DTR
drops during an ARQ call. This allows time for a remote modem to acknowledge receipt of all transmitted
data before it is disconnected. The modem immediately hangs up when DTR drops. This option only
applies to connections terminated by dropping DTR. If the modem receives the ATH command, it ignores
S38 and immediately hangs up.
S39 0 Reserved.
S40 0 Reserved.
S41 0 Bit-mapped register setup. To set registers, see the instructions for S13 (“Settings for S13” on page 22).
S42 0 Reserved.
Bit Value Result
0 1 Reset when DTR drops.
1 2 Reset non-MNP transmit buffer from 1.5K to 128 bytes.
2 4 Set backspace key to delete.
3 8 On DTR signal, autodial the number stored in NVRAM at position 0.
4 16 At power on/reset, autodial the number stored in NVRAM at position 0.
5 32 Reserved.
6 64 Disable quick retrains.
7 128 Disconnect on escape code.
Bit Value Result
0 1 Disable ARQ/MNP for V.22.
1 2 Disable ARQ/MNP for V.22bis.
2 4 Disable ARQ/MNP V.32/V.32bis.
Register Default value Function