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Chapter 5: Using the telephony modem
PN 365-095-33947 x.1 SBV2402 Internet & Voice cable modem for Xfinity® customers user guide
22
Mode
Power
US/DS
Online
Tel 1 / Tel 2
No AC power
Off
Off
Off
Off
Firmware
upgrade
On
Flash
On
(normal operation)
Patterns: startup sequence
There are two SBV2402 light patterns that display during each phase of the startup
sequence:
◼ Telephony startup sequence
◼ Cable modem startup sequence
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
On
Flash
Off
Retrieving telephone network
information
On
Off
Flash
Retrieving telephone network
information
On
Flash
Flash
Activating telephone service
Cable modem startup sequence
DS/US
Online
Description
Flash
Off
Downstream or upstream search
On
Flash
Downstream and upstream found; retrieving setup
information from service provider
On
On
Ready for service
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