Cisco Cisco TNCS Element Management System Data Sheet

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Description 
This full frequency agile transponder is designed to interface with 
Scientific-Atlanta’s Prisma
®
 Model 6940, 6942, and 6944 Optical 
Nodes.  It is controlled by Scientific-Atlanta’s Transmission 
Network Control System (TNCS) software. 
 
The transponder monitors the operational parameters of the node 
and allows remote control of certain node functions.  
Communications to and from the transponder are accomplished 
via the built in forward RF data carrier receiver and reverse RF 
data carrier transmitter.   
 
The unit monitors a wide range of operational parameters, including: 
•  Optical receive power for up to four receivers 
•  Optical transmit power for up to four transmitters 
•  RF level of the forward status monitor data carrier 
•  AC and DC power supply voltages  
•  Internal station temperature 
•  Open/closed housing status 
 
If the status of any monitored parameter is outside of established thresholds an alarm can be activated by the 
centrally located TNCS console.   All alarm thresholds are remotely adjustable from the console.  The transponder 
also enables remote control of the reverse “On/-6 dB/Off” RF switches (for remote isolation of ingress) and of the 
power supply. 
 
The transponder is packaged in an aluminum housing that mounts in the lid of the Model 6940 and 6944 Optical 
Nodes.  The input, output, and power cables that interface between the transponder and node are easily routed 
and plugged into quick connect sockets.  No tools are required to mount the transponder.   Once installed, LEDs 
on the transponder indicate; “Power On”, “Receiving Data”, and / or “Error” condition. 
 
 
Features 
•  “Plug-in” compatibility with the Model 6940, 6942, and 6944 Optical Nodes 
•  Frequency agile 5 to 65 MHz for reverse path 
•  Frequency agile 45 to 174 MHz for forward path 
•  Monitors all critical internal station parameters 
•  Controls all switches within the node  
•  Simple and efficient installation 
•  Wide operating temperature range 
 
Element Management 
Transponder for  
Prisma
®
 Model 6940/6942/6944 Optical Nodes