Indicator Lights: Startup Sequence
The following table shows the Telephony Modem light patterns during each phase
of the startup sequence. There are two phases of startup; the Telephony phase and
the cable modem phase. Both are outlined below.
Cable Modem Start Up Sequence
DS
US
Online
Link
Description
Flash
Off
Off
Off
Downstream search
On
Flash
Off
Off
Downstream found; upstream search
On
On
Flash
Off
Downstream and Upstream found; retrieving
setup information from cable operator
Power,
DS, US,
Online
Link
Telephone
Battery*
Description
1
2
Off
Off
Off
Off
Off
No power to Cable
Modem
Flash
Flash
Flash
Flash
Flash
Power-on Self Test
See “Cable Modem Start Up Sequence” Below
On
On
Flash
Off
Off
Retrieving telephone
network information
On
On
Off
Flash
Off
Retrieving telephone
line information
On
On
Flash
Flash
Off
Activating telephone
service
Normal Operation
* = Battery LEDs only apply to those models with battery backup
Touchstone TM604 Telephony Modem User’s Guide
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