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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