User`s guide
56K Professional Message Modem74
Register Default Function
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-S40 0 Reserved
S41 0 Reserved
S42 0 Reserved