12 4012160 Rev C
Front Panel Description
The front panel of your cable modem provides status LEDs that indicate how well
and at what state your cable modem is operating. See Front Panel LED Status
Indicator Functions (on page 53) for more information on front-panel LED status
indicator functions.
1 POWER – Illuminates solid green to indicate that AC power is being applied to
the cable modem. AC power must be available to recharge the optional battery.
2 DS (Downstream) – Indicates the status of the connection for receiving data.
Illuminates during normal operation
3 US (Upstream) – Indicates the status of the connection for sending data.
Illuminates during normal operation
4 ONLINE – Illuminates solid green when the cable modem is registered on the
network and fully operational. This indicator blinks to indicate one of the
following conditions:
The cable modem is booting up and not ready for data
The cable modem is scanning the network and attempting to register
The cable modem has lost registration on the network and will continue
blinking until it registers again
5 LINK – Illuminates solid green to indicate that an Ethernet/USB carrier is
present and blinks to indicate that Ethernet/USB data is being transferred
between the PC and the cable modem
6 TEL 1 – Illuminates solid green when telephony service is enabled. Blinks when
line 1 is in use
7 TEL 2 – Illuminates solid green when telephony service is enabled. Blinks when
line 2 is in use
8 BATTERY (optional models only) – Illuminates solid green to indicate that the
battery is charged. Blinks to indicate that the battery charge is low. Off when
operating from battery power or when the battery charge is depleted or the
battery is defective
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