BLSR
Use the BLSR subtab to view bidirectional line switched ring (BLSR) information and to perform BLSR ring and span switches.
 
Item
Description
Type
Displays the BLSR type, either two-fiber or four-fiber.
Rate
Displays the BLSR OC-N rate.
Ring Name
Displays the user-assigned BLSR name.
Node ID
Displays the node’s BLSR identification number.
West Line
Indicates the BLSR west line at the node.
West Switch
Switches the BLSR west line:
CLEAR—Clears a switch event not caused by a line failure.
LOCKOUT PROTECT SPAN—Prevents traffic from reverting to the span with the lockout applied. A lockout overrides other switching commands.
FORCE SPAN (For four-fiber only)—Forces a span switch. The Force Span command overrides normal protective switching mechanisms. Applying this command incorrectly can cause traffic outages.
FORCE RING—Forces a ring switch. The Force Ring command overrides normal protective switching mechanisms. Applying this command incorrectly can cause traffic outages.
MANUAL SPAN (For four-fiber only)—Initiates a span switch.
MANUAL RING—Initiates a ring switch.
EXERCISE SPAN (For four-fiber only)—Tests the BLSR functionality without switching traffic. Span exercise conditions (including the K-byte pass-through) are reported and cleared within 10 to 15 seconds. The field changes to NO COMMAND after the span exercise.
EXERCISE RING—Tests the BLSR functionality without switching traffic. Ring exercise conditions (including the K-byte pass-through) are reported and cleared within 10 to 15 seconds. The field changes to NO COMMAND after the ring exercise.
NO COMMAND—Indicates that a switch command is not in effect.
East Line
Indicates the BLSR east line at the node.
East Switch
Switches the BLSR east line:
CLEAR—Clears a switch event not caused by a line failure.
LOCKOUT PROTECT SPAN—Prevents traffic from reverting to the span with the lockout applied. A lockout overrides other switching commands.
FORCE SPAN (For four-fiber only)—Forces a span switch. The Force Span command overrides normal protective switching mechanisms. Applying this command incorrectly can cause traffic outages.
FORCE RING—Forces a ring switch. The Force Ring command overrides normal protective switching mechanisms. Applying this command incorrectly can cause traffic outages.
MANUAL SPAN (For four-fiber only)—Initiates a span switch.
MANUAL RING—Initiates a ring switch.
EXERCISE SPAN (For four-fiber only)—Tests the BLSR functionality without switching traffic. Span exercise conditions (including the K-byte pass-through) are reported and cleared within 10 to 15 seconds. The field changes to NO COMMAND after the span exercise.
EXERCISE RING—Tests the BLSR functionality without switching traffic. Ring exercise conditions (including the K-byte pass-through) are reported and cleared within 10 to 15 seconds. The field changes to NO COMMAND after the ring exercise.
NO COMMAND—Indicates that a switch command is not in effect.
Apply
Applies changes made to the BLSR subtab.
Reset
Cancels any BLSR subtab changes and returns the fields to their last-saved settings.
Help
Displays context-sensitive help.

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