| Both the Cisco 675 and Cisco 678 modems have diagnostic lights that allow you to check the activity on your modem. |
| WAN LNK: | A steady green light shows that the modem has made a connection through the telephone line to MSN Broadband. |
| WAN ACT: | A blinking yellow light shows that the modem is sending/receiving data. |
| LAN LNK: | A steady green light shows that the modem has made a connection to a computer through your LAN. |
| LAN ACT: | A blinking yellow light shows that the modem is sending/receiving data. |
| ALARM: | A red light warns that the modem has an internal problem. |
| POWER: | A steady green light shows that the modem is on. |
