Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 215)

Configuration Options for AS2000 and ConnecT1 Plus
Access Manager 2000 User Manual 5 -91
DIUs must be synchronized to the CSU for proper operation.
To view the timing options, press . The following screen appears:
See the individual CSU hardware manuals for further information on the
clock source options listed below.
Option Conditions
NONE
(default) Choose if the CSU circuit element is not associated with any
DIUs. The
Data Bus Used option must first be set to
NONE .
THROUGH Choose fo CSU/DIU drop-and-insert configurations that
require through timing. This is the choice for drop-and-insert
operation. Do not select this for DSU/CSU mode of operation.
INT Choose fo CSU /DIU configurations in which the clock
generated internally is to be used for data timing and both
DS1’s transmit timing.
EXT 422 or
EXT TTL Choose one if an external 1.544 MHz gapped or non-gapped
clock is connected directly to the CSU. Choose EXT 422 if the
clock is RS422, or choose EXT TTL if the clock is TTL.
NET Choose fo CSU/DIU configurations in which timing is provide
from a clock recovered from the incoming network signal. This
is the default setting for CSU/DIU configurations without drop-
and-insert.
DIU Timin
F8