Chapter 8 SONET Topologies and Upgrades

8.3.4 BLSR Fiber Connections

Table 8-2

Four-Fiber BLSR Capacity

 

 

 

 

 

OC Rate

Working Bandwidth

Protection Bandwidth

Ring Capacity

 

 

 

 

OC-48

STS 1-48 (Fiber 1)

STS 1-48 (Fiber 2)

48 x N1 – PT2

OC-192

STS 1-192 (Fiber 1)

STS 1-192 (Fiber 2)

192 x N – PT

 

 

 

 

1.N equals the number of ONS 15600 nodes configured as BLSR nodes.

2.PT equals the number of STS-1 circuits passed through ONS 15600 nodes in the ring (capacity can vary depending on the traffic pattern).

Figure 8-8shows an example of BLSR bandwidth reuse. The same STS carries three different traffic sets simultaneously on different spans around the ring: one set from Node 3 to Node 1, another set from Node 1 to Node 2, and another set from Node 2 to Node 3.

Figure 8-8 BLSR Bandwidth Reuse

Node 0

STS 1

STS 1

Node 3

STS 1

Node 2

Node 1

STS 1

= Node 3

– Node 1 traffic

 

= Node 1

– Node 2 traffic

96662

= Node 2

– Node 3 traffic

8.3.4 BLSR Fiber Connections

Plan your fiber connections and use the same plan for all BLSR nodes. For example, make the east port the farthest slot to the right and the west port the farthest slot to the left. Plug fiber connected to an east port at one node into the west port on an adjacent node. Figure 8-9shows fiber connections for a two-fiber BLSR with trunk (span) ports in Slot 4 (west) and Slot 12 (east). Refer to the Cisco ONS 15600 Procedure Guide for fiber connection procedures.

Cisco ONS 15600 Reference Manual, R7.2

8-9

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Cisco Systems ONS 15600 manual Blsr Fiber Connections, OC-48 STS 1-48 Fiber N 1 PT OC-192 STS 1-192 Fiber N PT
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ONS 15600 specifications

Cisco Systems ONS 15600 is a highly versatile optical networking platform designed to meet the demands of modern telecommunications and data services. This multiservice edge platform supports various transmission mediums and offers a wide array of features that enable efficient data transport. Ideal for service providers and large enterprises, the ONS 15600 is engineered to provide scalable and reliable optical transport solutions.

One of the notable features of the ONS 15600 is its capability to support multiple protocols, including SONET/SDH, Ethernet, OTN, and legacy TDM services. This flexibility allows users to tailor their networks according to specific service requirements while ensuring interoperability with existing infrastructure. The platform is designed to facilitate seamless service migration, accommodating both legacy and next-generation services.

The modular architecture of the ONS 15600 enhances its scalability. It allows for easy expansion by incorporating additional line cards or interface modules without requiring significant downtime. This modularity ensures that service providers can evolve their networks over time, responding to increasing bandwidth demands and new service offerings with ease.

Incorporating advanced technologies, the ONS 15600 employs Dense Wavelength Division Multiplexing (DWDM), significantly increasing the capacity of fiber networks by allowing multiple signals to be transmitted simultaneously over a single optical fiber. This capability helps to optimize fiber utilization and reduce operational costs. In addition, the platform supports Optical Transport Network (OTN) for improved error detection and correction, contributing to higher reliability and performance.

Another key characteristic of the ONS 15600 is its robust management capabilities. The platform can be managed through Cisco's Optical Networking Manager (ONM), providing a centralized interface for network configuration, monitoring, and troubleshooting. This enhances operational efficiency and minimizes downtime, allowing service providers to focus on delivering quality services to their customers.

The ONS 15600 also prioritizes security, offering various features like encryption and access control to safeguard sensitive data during transmission. With its combination of scalability, flexibility, and security, the Cisco ONS 15600 stands out as a reliable choice for organizations looking to enhance their optical networking capabilities while meeting the evolving demands of the digital landscape. Its commitment to quality and performance makes it a cornerstone of modern optical networks.
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