Chapter 4: Using the telephony modem
Patterns: normal operation
The following table shows light patterns during normal operation.
Mode
Power
US/DS
Online
Tel 1 / Tel 2
Battery
AC power
On
On
= Connected to
the Internet (ultra-
high speed)
Flash
= Not
connected to the
Internet
On
= Internet
available
Off = Internet
not available
On
= On-
hook
Flash
= Off-
hook
Off =
disabled
On
= Battery
charging
Off = Battery
fully charged
OR battery
missing
OR MTA not
registered
Flash
= Battery
bad
Battery mode
(no AC power;
battery
installed)
Flash
Off
Off
On
= On-
hook
Flash
= Off-
hook
Off =
disabled
Off = Battery
good
Flash
= Battery
bad or low
No AC power;
no battery
Off
Off
Off
Off
Off
Firmware
upgrade
On
Flash
On
(normal
operation)
(normal
operation)
Patterns: startup sequence
The following tables show your 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
(page 31)
On
Flash
Off
Retrieving telephone network information
On
Off
Flash
Retrieving telephone network information
On
Flash
Flash
Activating telephone service
SURFboard
®
SBV3202 DOCSIS 3.0 telephony modem for Xfinity
®
customers User Guide STANDARD Revision x.3
30
