3Com 3C900B Installation And Operating Instructions Manual page 141

Register Default
S38 0
S39-S40 Reserved
S41 0
T
ECHNICAL
Function
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.
Bit-mapped register setup. To set registers, see instructions for S13.
Bit Value Result
0 1 Distinctive ring enabled.
1-7 2-128 Reserved
Q R
UICK EFERENCE
137