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Cisco ONS 15454 Procedure Guide, R5.0
August 2005
Chapter 6 Create Circuits and VT Tunnels
NTP-A185 Create a Manually Routed DS-3 Circuit
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OOS,MT—Puts the circuit cross-connects in the OOS-MA,MT service state. The maintenance
state does not interrupt traffic flow; it suppresses alarms and conditions and allows loopbacks
to be performed on the circuit. Use OOS,MT for circuit testing or to suppress circuit alarms
temporarily. Change the administrative state to IS; IS,AINS; or OOS,DSBLD when testing is
complete. See the “DLP-A230 Change a Circuit Service State” task on page 19-19.
For additional information about circuit service states, refer to the “Circuits and Tunnels” chapter
in the Cisco ONS 15454 Reference Manual.
• Apply to drop ports—Check this check box if you want to apply the administrative state chosen in
the State field to the circuit source and destination ports. CTC applies the administrative state to the
ports only if the circuit bandwidth is the same as the port bandwidth or, if the port bandwidth is
larger than the circuit, the circuit must be the first circuit to use the port. If not, a Warning dialog
box displays the ports where the administrative state could not be applied. If the check box is
unchecked, CTC does not apply the administrative state of the source and destination ports.
Note Loss of signal alarms are generated if ports in the IS-NR service state are not receiving
signals.
• Protected Drops—Check this check box if you want the circuit routed to protect drops only, that is,
to ONS 15454 cards that are in 1:1, 1:N, 1+1, or optimized 1+1 protection. If you check this check
box, CTC provides only protected cards as source and destination choices.
Step 8 If the circuit will be routed on a path protection, complete the “DLP-A218 Provision Path Protection
Selectors” task on page 19-12.
Step 9 Click Next.
Step 10 Complete the “DLP-A510 Provision a DS-3 Circuit Source and Destination” task on page 22-3.
Step 11 In the Circuit Routing Preferences area (Figure 6-5 on page 6-21), uncheck Route Automatically. When
Route Automatically is not selected, the Using Required Nodes/Spans, Review Route Before Circuit
Creation, and VT-DS3 Mapped Conversion check boxes are unavailable.
Step 12 To set the circuit path protection, complete one of the following:
• To route the circuit on a protected path, leave Fully Protected Path checked and continue with
Step 13. Fully protected paths might or might not have path protection path segments (with primary
and alternate paths), and the path diversity options apply only to path protection path segments, if
any exist.
• To create an unprotected circuit, uncheck Fully Protected Path and continue with Step 15.
• To route the circuit on a BLSR protection channel, if available, uncheck Fully Protected Path,
check Protection Channel Access, click Ye s in the Warning dialog box, then continue with Step 15.
Caution Circuits routed on BLSR protection channels are not protected and are preempted during BLSR
switches.
Step 13 If you selected Fully Protected Path in Step 12 and the circuit will be routed on a path protection, choose
one of the following:
• Nodal Diversity Required—Ensures that the primary and alternate paths within the path protection
portions of the complete circuit path are nodally diverse.
• Nodal Diversity Desired—Specifies that node diversity is preferred, but if node diversity is not
possible, CTC creates fiber-diverse paths for the path protection portion of the complete circuit path.
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