4-Port and 8-Port Asynchronous/Synchronous Serial Network Module
Each port on an asynchronous/synchronous serial network module also has the additional
LEDs shown in Table 6-7.
Table 6-7
LED
CN/LP
RXC
RXD
TXC
TXD
6-18
Cisco Network Modules Hardware Installation Guide
Asynchronous/Synchronous Serial Network Module LEDs
Meaning
Connect when green, loopback when yellow
Receive clock
Receive activity
Transmit clock
Transmit activity