Server Technology PP02 - Manual (Page 21)

No Answer RE BOOT
With the No Answer RE BOOT method, the Power On/Off +Aux control unit will count incoming RINGs and only initiate
a reboot when a selected Ring-Count occurs and the call is not answered. If the call is answered (off-hook is detected) at
anytime, either before or after the selected Ring-Count, the reboot is canceled.
The minimum Ring-Count required to initiate a reboot can be set to either one (1) or eight (8). Set to one, any incoming
call that is not answered will initiate a reboot when the caller hangs-up (RINGs cease). Set to eight, the caller must allow
at least eight RINGs to occur before hanging-up to initiate the reboot.
This method is extremely useful for high-traffic systems, such as a bulletin-board or fax servers, where lock-up/error
conditions generally cause incoming calls to go unanswered. Using this method, the lock-up/error condition will clear
automatically when the system reboots after a failed connection attempt.
To be covered for ALL types of lock-up/error conditions, it is advisable to configure the host modem to answer on two
rings greater than the minimum Ring-Count. If the Ring-Count is set to one (1), the host should be set to answer on ring
number three (3). If the Ring-Count is set to eight (8), the host should be set to answer on ring ten (10). In cases where
the modem answers but the connection fails or operation is unsuccessful, this will allow a reboot to be forced by re-
dialing and hanging-up after the selected Ring-Count but before the modem answers.
For example, the system will operate as follows (Ring-Count = 1):
A call placed to the host PC is answered on the third ring, the modem connection is made, and the session is
successful. A
RE BOOT will not occur.
A call placed to the host PC is answered on the third ring, the modem connection is made, but the session is not
successful. To force a
RE BOOT, place another call and allow only one (1) RING to occur, and then hang-up.
A call placed to the host PC is not answered (the line continues to ring). A RE BOOT will occur automatically
when the caller gives up and hangs-up (rings cease).
On-Hook RE BOOT
With the On-Hook RE BOOT method, the Power On/Off +Aux control unit will initiate a reboot upon detecting the ON-
HOOK condition that occurs upon hang-up with every modem disconnect. Often called the "sledgehammer" method, this
is a hardware equivalent to the 'reboot on hang-up' option found in many host/communication programs. This method
will initiate a reboot after each and every inbound call.
Similar to the No Answer RE BOOT method, this method also counts incoming rings to provide a reboot in cases where
incoming calls are never answered. In such cases, the caller will need to either hang-up (Ring-Count set to 1) or allow at
least eight rings to occur before giving up (Ring-Count set to 8).
Remote Power On/Off RE BOOT Mode • 21