Touchstone™ TM501 Telephony Modem User’s Guide
32
Getting
Ethernet
Safety
Started
Installation
Configuration
Usage
Troubleshooting
Glossary
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
Telephony Start-Up Sequence
DS
US
Online
Link
Description
Off
Off
Off
Off
No power to Cable Modem
Flash
Flash
Flash
Flash
Power-on Self Test
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
Telephony Start-Up
Power, DS,
US, Online
Link
Telephone
Description
On
On
Flash
Retrieving telephone network information
On
On
Off
Retrieving telephone line information
On
On
Flash
Activating telephone service
Normal Operation
