User guide

2-20
Cisco Transport Manager Release 9.2 GateWay/CORBA User Guide and Programmer Manual
OL-20937-01
Chapter 2 NE- and CTM-Specific Details
2.1.11 ONS 15600 SONET
2.1.11.3 Topological Links
Topological links are unidirectional or bidirectional for ONS 15600 SONET NEs.
2.1.11.4 PTPs
All PTPs are bidirectional for the ONS 15600 SONET. These ports are always in channelized mode.
PTPs support In Service and Out of Service–Maintenance values for the service state attribute.
2.1.11.5 CTPs
All CTPs are in channelized mode for the ONS 15600 SONET. Alarm monitoring cannot be turned on
or off for CTPs.
2.1.11.6 SNCs
One ONS 15600 SONET NE supports a maximum of 1536 STS SNCs.
2.1.11.7 Protection
The ONS 15600 SONET supports 1+1 protection to create redundancy for optical ports. Protect ports
must match the working ports. For example, port 1 on an OC-48 card can be protected only by port 1 on
another OC-48 card.
2.1.11.8 Autodiscovery
The ONS 15600 SONET supports automatic discovery of connected elements. CTM can connect to one
node and retrieve information about all connected nodes. The first time CTM connects to a node, it
retrieves only the IP address of the connected node; CTM does not retrieve the node name. However,
CTM must report this element to the users. Because the IP address is unique, CTM initializes the name
of the newly discovered element with the IP address. An object creation event is generated for this
managed element with the IP address as the name. Later, CTM connects to this element and retrieves all
information, including the actual name, and an AVC event is generated for the managed element name.
The NMS listens to the AVC event for the managed element name and invokes
managedElementManager::ManagedElementManager_I:: getManagedElement.
Disabled (DSBLD) The entity has been manually removed from service and cannot perform its provisioned
functions. All of its provisioned services are disrupted. Traffic is not carried.
Loopback (LPBK) The loopback command is in effect (any loopback type).
Table 2-15 Equipment Service State–Secondary (ONS 15600 SONET) (continued)
Secondary States (SST)
Attribute Value Meaning