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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
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
a soak 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 7-2 shows 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.