JAJSLL2B April 2021 – November 2021 DP83561-SP
PRODUCTION DATA
When operating in 10BASE-Te or 100Base-T mode, signals can be looped back at the RJ-45 connector by wiring the transmit pins to the receive pins. Due to the nature of the signaling in 1000Base-T mode, this type of external loopback is not supported. Analog loopback provides a way to loop data back in the analog circuitry when operating in 1000Base-T mode. For proper operation in Analog Loopback mode, attach 100-Ω terminations to the RJ45 connector.