Chapter 7: Using the Telephony Modem
Release 8 STANDARD 1.3 August 2016 Touchstone TM822G Telephony Modem User Guide
© 2011-2016 ARRIS Enterprises LLC. All Rights Reserved. 35
Note 1: Your service provider may configure the Telephony Modem to always display the DS,
US, and Link indicators in green regardless of the connection speed or swap the meaning
(speed indication) of yellow and green.
Patterns: Startup Sequence
The following tables show 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.
Telephony Startup Sequence
Power, US/DS,
Online
Telephone 1 Telephone 2 Description
Off Off Off No power to modem
Flash Flash Flash Power-on Self Test
See Cable Modem Startup Sequence (page 35)
On Flash Off Retrieving telephone network
information
On Off Flash Retrieving telephone line
information
On Flash Flash Activating telephone service
Normal Operation
Note: The US/DS indicator flashes yellow during startup and turns green if the Telephony
Modem establishes an ultra-high speed connection. For some service providers, these colors
may be reversed.
Cable Modem Startup Sequence
DS US Online Description
Flash Off Off Downstream search
On Flash Off Downstream found; upstream search
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