[SOLVED] RJ-45 with magnetics transformer (Ethernet port) connections

[mandarsansare]

I am working on circuit having RJ45 connector with built-in magnetics transformer. The schematic diagram of mentioned circuit shows following connections with Rj45 magnetics connector. At first I did not connect the RC circuit (consisting of R17-R18-C10 ,R19-R20-C8 ) to the Rj45 magnetics connector....circuit worked but gave some random behavior. After that i connected the RC circuit and then circuit worked perfectly... I want to know- what is the need of that RC circuit in this???...how it helps in improving the performance..??

Any kind of help is appreciated !!! Thank you

 

[techgreed]

Those resistors are added for line termination to reduce the reflections and maintain signal integrity.