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
Power, DS, US,
Online
Link
Telephone
Description
Off
Off
Off
No power to Cable Modem
Flash
Flash
Flash
Power-on Self Test
See “Cable Modem Start Up Sequence” Below
On
On
Flash
Retrieving telephone network
information
On
On
Off
Retrieving telephone line
information
On
On
Flash
Activating telephone service
Normal Operation
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
Touchstone TM601 Telephony Modem User’s Guide
Safety
Getting
Started
Installation
Ethernet
Configuration
Usage
Troubleshooting
Glossary
38
