User`s guide

Touchstone TM401 Telephony Modem User’s Guide 32
Safety Getting Started Installation Ethernet Configuration Usage Troubleshooting Glossary
LED Indicators: 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
* = If this pattern of all LEDs flashing persists, the Telephony Modem has detected foreign voltage on
the telephone line. Disconnect the telephone connection and call a qualified telephone installer to
troubleshoot.
Power DS US Online Description
On Flash Off Off Downstream search
On On Flash Off Downstream found, upstream search
On On On flash Downstream and Upstream found,
retrieving setup information from cable
operator
CM Normal Operation