Chapter 6: Operate the Telephony Modem
Mode
Power
US/DS
Online
Link
Tel 1/2/3/4
Battery
power
mode
Off =
disabled
Flash =
battery
bad or low
No AC
power / no
battery
Off
Off
Off
Off
Off
Off
Firmware
upgrade
On
Flash
On
(normal
operation)
(normal
operation)
(normal
operation)
Telephony startup sequence
Table 2: Light patterns that occur during telephony startup
Power, DS,
US, Online
Tel 1
Tel 2
Tel 3
Tel 4
Description
Off
Off
Off
Off
Off
No power to modem
Flash
Flash
Flash
Flash
Flash
Power-on self test
On
Flash
Off
Off
Off
Retrieving telephone
network information
On
Off
Flash
Off
Off
Retrieving telephone line information
On
Flash
Flash
Flash
Flash
Activating telephone service
Note:
Only phone lines
being provisioned will flash.
Normal operation begins
Note:
The DS and US indicators flash yellow during startup and turn green if the
Telephony Modem establishes an ultra-high speed connection. For some service
providers, these colors may be reversed. The Link indicator may be yellow or
green, as determined by the table in
Cable modem startup sequence
Table 3: Light patterns that occur during cable modem startup
DS
US
Online
Description
Flash
Off
Off
Downstream search
On
Flash
Off
Downstream found; upstream search
Touchstone TM804 Telephony Modem User Guide STANDARD Revision 1.2
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