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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 15      Management Network Connectivity
15.8    TCP/IP and OSI Networking
OSI has to be carried or tunneled to the other TXP/MXP card through an OSC termination, GCC 
termination, or both. The third-party NMS has OSI connectivity to its NEs with the MSTP ONS NE 
serving as the GNE for third-party vendor, OSI-based SONET equipment.
Figure 15-27 OSI/MSTP Scenario 1
OSI/MSTP Scenario 2 (Figure 15-28) is similar to Scenario 1, except the MSTP NEs do not have 
connectivity to an OSI NMS.
Third party OSI
based NMS
OSC
OSC
GCC
OSC
OSC
SDCC/RS-DCC
SDCC/RS-DCC
OSI over SDCC/RS-DCC
OSI over SDCC/RS-DCC
TXP/MXP
TXP/MXP
Other vendor
SONET/SDH
Other vendor
SONET/SDH
DCN (IP/OSI)
MSTP
GNE
MSTPMSTP
MSTP
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