Item
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Description
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STS
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Shows the specific synchronous transport signal (STS) number.
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VT
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Shows the virtual tributary (VT) number.
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UPSR
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(UPSR circuits only) If the STS and VT are protected by a UPSR, a check appears in the UPSR column.
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Circuit
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Shows the circuit name that uses the STS and VT. If the STS and VT are not used by a circuit, "unused" is displayed. For virtual concatenated (VCAT) circuits, the name of the VCAT circuit is shown with the member circuit name in brackets.
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Switch State
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(UPSR circuits only) Shows the switch state of the circuit span. Valid values are:
CLEAR: No UPSR switch is active.
MANUAL: A Manual switch is active on the span.
FORCE: A Force switch is active on the span.
LOCKOUT_OF_PROTECTION: A protection Lockout is active on the span;
traffic cannot be switched to it.
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Perform UPSR span switching
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(UPSR circuits only) Allows you to initiate a span switch. Valid entries are:
CLEAR: Clears any UPSR switches that are active on the span.
MANUAL: Initiates a Manual switch on the span.
FORCE: Initiates a Force switch on the span.
LOCKOUT_OF_PROTECTION: Initiates a protection Lockout on the span;
traffic cannot be switched to it.
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Apply
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Applies the switch or lockout.
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Help
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Displays CTC context-sensitive help.
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