Verilink Access Manager 2000 (896-502037-001) Product Manual User Manual
Page 293
Displaying individual circuit element status
Access Manager 2000 User Manual
8-23
In the following screen, the status indicators show the source of timing
for the TIU .
■
If both the
EXT TTL
and
EXT 422
lines on the screen are
NO
and the
Frequency
line indicates
Nx56kbps
or
Nx64kbps
,
then the TIU is timing off the data bus from a DIU.
■
If either the
EXT TTL
or
EXT 422
line is
YES
on the screen
and
Frequency
line is
Nx56kbps
or
Nx64kbps
, then the
TIU is timing off a data port.
The following items explain the fields in this screen.
Field Value
Meaning
Frequency
The frequency of the clock source from which
the TIU derives synchronization.
EQPT Clock
Yes
The source clock is in the signal received fro
the EQPT.
NET Clock
Yes
The source clock is in the signal received fro
the NET.
DIU
Yes
The source clock is derived internally, from the
DIU
EXT-TTL
Yes
The source clock is from an external source,
not EQPT or NET signal, at TTL levels.
EXT-442
Yes
The source clock is from an external source,
not EQPT or NET signal, at RS422 levels.