Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
Unframed All Ones:
Enabling this will instruct the DACS module to consider the UA1 condition when evaluating which
map to use.
PCV (Path Code Violation) Rate Exceeded:
Enabling this will instruct the DACS module to consider PCV condition when evaluating which map
to use. Note that the threshold of PCVs required to consider the port faulted is programmable and
must be set by the user.
Fast Loss of Frame:
This feature must be disabled in an M-DACS.
System Type:
This feature allows the user to set the DACS module for either T1 or E1.
Note: When switching from one mode to the other, you must recycle power on the M-
DACS after the setting has been changed.
Recovery Delay:
This specifies the delay from the restoration of a port to taking action and returning to the default map.
This delay is intentionally long (settable in seconds) to ensure that the network has been properly
healed and is stable prior to changing paths.
PCV Rate:
If the user has decided to use PCVs as part (or all) of the switching decision inputs, the error threshold
must be set. For user convenience, the input is expressed in bit error rate and converted to units
appropriate for the actual PCV detection. Note that due to limitations in the basic T1 framing
structure, only PCVs are detected, not actual bit errors - the bit error rate entered by customer is only
used as an approximation.
Primary Clock:
The primary source of timing for the DACS module must be specified by the user. Note that incorrect
network timing can cause system errors and instability. The available timing options are:
Internal clock,
External clock, and
Timing recovered from any of the 8 T1 ports as a Master Timing source. This may be set at
one node of a network to help improve system performance in the event of a catastrophic
failure of the node that is intended to provide the system timing. To do this the node adjacent
to the timing source is configured to use the port connected to the master timing node as a
master timing port.
Timing recovered from any of the 8 T1 ports.
Note: Refer to paragraph 5.5.3.7.1.1 for T1 Timing Modes
M-DACS-T1 RFL Electronics Inc.
February 28, 2006 5-27 (973) 334-3100
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