13-7
Cisco ONS 15454 Procedure Guide, R5.0
December 2004
Chapter 13 Convert Network Configurations
NTP-A303 Convert an Unprotected Point-to-Point or 1+1 Linear ADM to a Two-Fiber BLSR Automatically
Note Before beginning this procedure, you should have a unique ring name to identify the new BLSR and a
unique node ID number for each node in the ring.
Note Before beginning this procedure, optical transmit and receive levels should be in their acceptable range
as shown in Table 2-3 on page 2-15.
Note If overhead circuits exist on the network, this procedure is service affecting. The overhead circuits will
drop traffic and have a status of PARTIAL after the upgrade is complete.
Step 1 Complete the “DLP-A60 Log into CTC” task on page 17-66 at a node on the point-to-point or linear
ADM. If you are already logged in, continue with Step 2.
Step 2 Complete the “DLP-A298 Check the Network for Alarms and Conditions” task on page 19-63.
Step 3 Complete the “DLP-A155 Delete a Protection Group” task on page 18-23 at the nodes that support the
point-to-point or linear ADM span to remove any protection groups that may exist.
Step 4 Complete the “DLP-A377 Provision Section DCC Terminations” task on page 20-61 at the nodes that
support the point-to-point or linear ADM span. Provision the slot in each node that is not already in the
SDCC Terminations list.
Step 5 From the Tools menu, choose Topology Upgrade > Convert UPSR to BLSR. In the Topology
Conversion dialog box, set the BLSR properties:
• Ring Type—(Display only.) The default is two-fiber.
• Speed—Choose the BLSR ring speed: OC-12, OC-48, or OC-192. The speed must match the OC-N
speed of the BLSR trunk (span) cards.
Note If you are creating an OC-12 BLSR and will eventually upgrade it to OC-48 or OC-192, use
the single-port OC-12 cards (OC12 IR/STM4 SH 1310, OC12 LR/STM4 SH 1310, or
OC12 LR/STM4 LH 1550).
• Ring Name—Assign a ring name. The name can be from 1 to 6 characters in length. Any
alphanumeric string is permissible, and upper and lower case letters can be combined. Do not use
the character string “All” in either upper or lower case letters. This is a TL1 keyword and will be
rejected. Do not choose a name that is already assigned to another BLSR.
• Reversion time—Set the amount of time that will pass before the traffic reverts to the original
working path following a ring switch. The default is 5 minutes. Ring reversions can be set to Never.
Step 6 Click Next. If the network graphic appears, go to Step 7.
If CTC determines that a BLSR cannot be created, for example, not enough optical cards are installed or
it finds circuits with path protection selectors, a “Cannot Create BLSR” message appears. If this occurs,
complete the following steps:
a. Click OK.
b. In the Create BLSR window, click Excluded Nodes. Review the information explaining why the
BLSR could not be created, then click OK.
c. Depending on the problem, click Back to start over or click Cancel to cancel the operation.
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