Transceivers

• Most transceivers are stamped or molded to show which port is transmit and which port is receive:

Polarity Examples

Juniper QFX5100/QFX5110

• On Juniper QFX5100 and QFX5110:
  • Even ports (top row) will have the transmitter on left, receiver on the right
  • Odd ports (bottom row) will have the receiver on the left, transmitter on the right

ASR920

Mux/Demux