Intel SR870BN4 - Server Platform - 0 MB RAM Product Manual page 114

Modem Escape Sequence
Enter the ASCII escape string to be sent to the modem before sending a command string. This
string can be up to five characters long and is typically set to +++. If this field is left empty, the
BMC uses +++. The modem escape sequence is not sent to the modem if DTR Hang-up is enabled
on the initial Serial/Modem Channel Configuration Sub-task screen.
Hang-up Sequence
Enter the ASCII string that is sent to the modem to terminate the session. This string can be up to
eight characters long is typically set to ATH. The BMC automatically follows this string with an
<Enter> character when sending it to the modem. If this field is left empty, the BMC uses ATH.
The hang-up sequence is not sent to the modem if DTR Hang-up is enabled on the initial
Serial/Modem Channel Configuration Sub-task screen.
Dial Command
Enter the ASCII string for the modem string used to initiate a dial sequence with the modem. If this
parameter is left empty, the BMC uses ATD.
Ring Duration
The Modem Ring Time setting specifies the time it takes the BMC to claim the serial connection
after detecting the phone ringing while monitoring the Ring Indicator (RI) line. By configuring the
Ring Duration, the user can specify the amount of time that the BMC takes to switch the mux when
RI is first detected. The ring duration and ring dead time have meaning only when the
serial/modem channel access mode is set to shared.
The default values that are stored in firmware need to be adjusted for the phone in the region where
the server/modem is located. The suggested ring duration for a US phone is 10000 ms.
The ring duration value should be entered in 500 ms increments; the SMU will round entries down
to the nearest 500 ms. A value of 0 configures the BMC to switch the mux immediately on the first
detected transition of RI.
The range of values entered can be in the range between 0 and 31000; be aware that the SMU
rounds values down to the nearest 500 ms.
Ring Dead Time
This setting allows the user to specify the amount of time that the RI signal must be deasserted
before the BMC determines that ringing has stopped. The ring duration and ring dead time have
meaning only when the serial/modem channel access mode is set to shared.
The ring duration value should be entered in 500 ms increments and the SMU will round entries
down to the nearest 500 ms. A value of 0 configures the BMC to switch the mux immediately on
the first detected transition of RI. The value entered should reflect any dependencies on modem
type, location of server, and the phone line carrier.
The default values that are stored in firmware need to be adjusted for the phone in the region where
the server/modem is located. The suggested ring dead time for a US phone is 7000 ms.
The range of values entered can be in the range between 500 and 8000; be aware that the SMU
rounds values down to the nearest 500 ms.
114 Intel® SR870BN4 Server System Product Guide