Dwdm Node Configurations - Cisco ONS 15454 DWDM Installation And Operation Manual

17.2 DWDM and TDM Hybrid Node Types
17.2 DWDM and TDM Hybrid Node Types
The node type in a network configuration is determined by the type of card that is installed in an
ONS 15454 hybrid node. The ONS 15454 supports the following hybrid DWDM and TDM node types:
1+1 protected flexible terminal, scalable terminal, hybrid terminal, hybrid OADM, hybrid line amplifier,
and amplified TDM.
The MetroPlanner tool creates a plan for amplifier placement and proper equipment for DWDM node
Note
configurations. Although TDM cards can be used with DWDM node configuration, the MetroPlanner
tool does not create a plan for TDM card placement. MetroPlanner will support TDM configurations in
a future release.
17.2.1 1+1 Protected Flexible Terminal Node
The 1+1 protected flexible terminal node is a single ONS 15454 node equipped with a series of OADM
cards acting as a hub node configuration. This configuration uses a single hub or OADM node connected
directly to the far-end hub or OADM node through four fiber links. This node type is used in a ring
configured with two point-to-point links. The advantage of the 1+1 protected flexible terminal node
configuration is that it provides path redundancy for 1+1 protected TDM networks (two transmit paths
and two receive paths) using half of the DWDM equipment that is usually required. In the following
example
ring for protection purposes. If the fiber is damaged on one side of the ring, traffic still arrives safely
through fiber on the other side of the ring.
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
17-14
(Figure 17-15), one node transmits traffic to the other node on both east and west sides of the
Chapter 17 Node Reference
August 2005