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Campus-REX RS Interface Card User Manual 1-5
The range of rates available for the HDSL Rate depends on the setting of
the Extended Mode Loop Configuration:
– 1 Loop HDSL Rate settings are between 128 kbps and 1.152 Mbps,
in 64 kbps increments
– 2 Loop HDSL Rate settings are between 256 kbps and 2.304 Mbps,
in 128 kbps increments
For information on setting these options, see “Set the HDSL Operating
Mode” on page 3-7.
ESTABLISHING AN HDSL LINK
Before an HDSL link can be established in Standard or Extended Mode, the
HDSL parameters for both the local and remote units must be set identically.
Using AutoSync Mode allows one unit to determine the HDSL parameters.
In AutoSync Mode, one unit is configured as a master and the other as a slave.
Upon startup, the HDSL parameters of the master unit are used to establish
the HDSL link. No further configuration of the slave unit is required.
If the remote unit is not configured as an AutoSync slave, an AutoSync
connection will not be established and the system generates an AutoSync
minor alarm. After several failed attempts, the master enters Fallback Mode
and attempts to establish a normal HDSL link with the same HDSL
parameters. If this is unsuccessful, for example, if the slave unit is configured
to a different HDSL Rate, the master unit reverts to attempting to establish an
AutoSync connection.
Not all of these modes and rates are available if the remote
Campus-RS system does not support them. Refer to the
remote interface card User Manual to see the HDSL modes
and rates supported by the card.
CAD1069i5.book Page 5 Thursday, May 30, 2002 7:32 AM