Chapter 7 Circuits and Tunnels

Circuit Properties

is completed. This allows you to provision a circuit using TL1, verify its path continuity, and prepare the port to go into service when it receives an error-free signal for the time specified in the port soak timer. Two common examples of state changes you see when provisioning circuits using CTC are:

When assigning the Automatic In Service administrative state to cross-connects in VC-12 circuits and VC low-order path tunnels, the source and destination ports on the VC-12 circuits remain in the locked-disabled,Automatic In Service service state until an alarm-free signal is received for the duration of the soak timer. When the soak timer expires and an alarm-free signal is found, the VC-12 source port and destination port service states change to unlocked-enabled and the circuit service state becomes unlocked.

When assigning the Automatic In Service administrative state to cross-connects in VC high-order path circuits, the circuit source and destination ports transition to the locked-disabled,Automatic In Service service state. When an alarm-free signal is received, the source and destination ports remain locked-disabled,Automatic In Service for the duration of the soak timer. After the port soak timer expires, VC high-order path source and destination ports change to unlocked-enabled and the circuit service state to unlocked.

To find the remaining port soak time, choose the Maintenance > Automatic In Service Soak tabs in card view and click the Retrieve button. If the port is in the locked-disabled,Automatic In Service service state and has a good signal, the Time Until unlocked column shows the soak count down status. If the port is locked-disabled,Automatic In Service and has a bad signal, the Time Until unlocked column indicates that the signal is bad. You must click the Retrieve button to obtain the latest time value.

Note Although the ML-100T-8 card does not use the Telcordia GR-1093-CORE state model, you can also set

asoak timer for ML-100T-8 card ports. The soak period is the amount of time that the ML-100T-8 port remains in the Down state after an error-free signal is continuously received before changing to the Up state. To find the remaining port soak time, choose the Maintenance > Ether/POS Port Soak tabs in ML-100T-8 card view and click the Retrieve button.

For more information about port and cross-connect service states, see Appendix B, “Administrative and Service States.”

7.2.3 Circuit Protection Types

The Protection column on the Circuit window shows the card (line) and SDH topology (path) protection used for the entire circuit path. Table 7-2shows the protection type indicators that you see in this column.

Table 7-2 Circuit Protection Types

 

 

Protection Type

Description

 

 

 

 

 

 

 

 

LMSP

The circuit is protected by a LMSP protection group.

 

 

 

 

 

 

 

 

N/A

A circuit with connections on the same node is not protected.

 

 

 

 

 

 

 

 

Protected

The circuit is protected by diverse SDH topologies, for example, a Linear Multiplex

 

 

 

 

Section Protection and 1+1.

 

 

 

 

 

 

 

 

Unknown

A circuit has a source and destination on different nodes and communication is

 

 

 

 

down between the nodes. This protection type appears if not all circuit components

 

 

 

 

are known.

 

 

 

 

 

 

 

 

Unprot (black)

A circuit with a source and destination on different nodes is not protected.

 

 

 

 

 

 

 

 

 

 

 

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

78-19417-01

 

 

 

7-5

 

 

 

 

 

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Cisco Systems 15310-MA manual Circuit Protection Types, Protection Type Description, Lmsp

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