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Cisco Systems, Inc.
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Performance Monitoring
The performance-monitoring capabilities of the 2.5G transponder card depend on the service being transported. For 2R services, performance
monitoring is limited to that provided by the SFP, which includes received and transmit powers, laser bias current, inventory, and the DWDM
optical interface, including received and transmit powers and laser bias current. For 3R services, performance monitoring is available based on
the signal type, except for 2-Gbps Fibre Channel, which again is limited to the performance-monitoring statistics delivered by the SFP optics
module. For SONET/SDH signals, extensive performance-monitoring and threshold-crossing conditions and alarms are supported per Telcordia
GR-474 and GR-2918, as well as ITU G.783 and ETS 300 417-1 standards. For data applications, such as Gigabit Ethernet and 1-Gbps Fibre
Channel, 8b/10b performance monitoring is supported. Finally, the digital wrapper channel is monitored per ITU-T requirements (G.709 and
G.798). Optical performance parameters on the DWDM line interface are supported, including laser bias current and receiver optical power.
Calculation and accumulation of the performance-monitoring data are in 15-minute and 24-hour intervals.
The 2.5 transponder cards incorporate faceplate-mounted LEDs to provide a quick visual check as to the operational status at the card. Printed
on the faceplate is an icon, an orange circle, indicating that the shelf slots on the card can be physically installed.
APPLICATION DESCRIPTION
The 2.5G transponder card adds numerous new applications to an already flexible Cisco ONS 15454 platform. One identified application
includes storage area networking (SAN) transport (Figure 6), providing connectivity between the primary and backup data centers for disaster
avoidance.
Figure 6
SAN Connectivity for Disaster Avoidance
Another application, detailed in Figure 7, is the transparent transport of SONET/SDH-based services, OC-48/STM-16 in this example, for a
carrier’s carrier service application.