Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP) Guía De Diseño

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Service providers positioned in SDH markets to deliver STM-1 and higher speed services can 
benefit from the Cisco ONS 15454.  An ONS 15454 based network can be used to deliver high-
speed leased line services to customers leveraging its SDH aggregation and tunneling capability.  
As illustrated in Figure 3-3, an ONS 15454 network enables service providers to differentiate 
themselves by offering high-speed native Ethernet connectivity, along with more traditional 
private line STM-based services.  STM-n leased lines can be offered within the Metro network as 
well as between Metro Area Networks (MANs), leveraging the aggregation capability of SDH 
payloads for long haul transport.  This application is valid for both Au4 and Au3 SDH multiplexing 
schemes. 
 

 

National or Pan-continental

SDH/DWDM network

Metro area

 

Hybrid Au3 SDH Aggregation 
 
To reduce the cost of leased lines, the aggregation of lower order circuits is mandatory for service 
providers.  The ONS 15454 enables service providers to efficiently aggregate mixed service 
types, including DS1, DS3, and Ethernet signals, into an STM-n interface for transport across a 
DWDM or other transport network. This capability allows you to fully utilize a leased circuit to 
transport various payloads without the need for additional multiplexing equipment.  Figure 3-4 
displays an example of the capability of a DS3/Au3 aggregation application.