Cabletron Systems KBU 64, Руководство пользователя

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KBU 64
User Manual
80-10100000-09 4–34
where
xxx is the time in seconds (0 to 999).
A value of 0 (factory default) disables backup on detection of I/DSR
going LOW on the LINK port.
Note: Only Kilostream NTUs operating at 9600 bit/s and below provide
an indication of line quality via the DCD control signal. Therefore, the
NTU delay timer has no effect on a Kilostream link which is operating at
a higher data rate. It also depends on the type of cable that is used
between the link ports and the Kilostream NTU, whether the DCD output
is routed to DSR (for NTU loss detection). Please contact your
Technical Support for further information.
4.15.9 CLOCKLOSS Timer
The KBU 64 monitors the incoming clock on the LINK port, and initiates
a backup (if BACKUP is set to AUTO, or WIN) to the ISDN line if the
clock fails. Any clock speed from 600Hz to 1.6MHz is detected as a
valid clock.
Backup starts immediately clock failure is detected. The Clock loss
timer defines how long the clock signal must be correct for, before
restoration of the leased line circuit is initiated:
1> SET DELAY CLOCKLOSS xx
[CR]
where
xxx is the time in seconds (0 to 999).
A value of 0 (factory default) disables backup on detection of clock loss
on the LINK port.
4.15.10 ALERT Timer
When an alert condition occurs (see section 4.12 ), a control signal (DSR)
is raised on the ALARM port for the period defined by this delay:
1> SET DELAY ALERT xx
[CR]
where
xxx
is the time in seconds (0 to 999).