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Problem
No telephone service
– or–
TEL 1 or TEL 2 LED is
off
Front Panel LEDs and Error Conditions
LED
Turns Off During Startup, If:
POWER
SBV6220 is not properly plugged into
the power outlet
RECEIVE
Downstream (receive) channel cannot
be acquired
SEND
Upstream (send) channel cannot be
acquired
ONLINE
IP registration is unsuccessful
TEL 1 or
If the TEL LED fails to flash during
TEL 2
startup, telephone line configuration has
failed
BATTERY
AC power is not present
Troubleshooting Tips • Front Panel LEDs and Error Conditions
SBV6220 DOCSIS 3.0 Digital Voice Modem • Installation Guide
548415-001-a
Possible Solution
If your telephone requires external power, check the AC power
connection to your telephone.
Check the connection between the SBV6220 and your telephone. If
they are properly connected and the TEL 1 or TEL 2 LED remains off,
the telephone line is not set up for voice service. Contact your service
provider.
Check the coaxial cable on the SBV6220 and the electrical outlet.
Hand-tighten the cable connectors if necessary.
If you have cable TV, check that your TV is working and the picture is
clear. If you cannot receive your regular TV channels, your telephone
service will not function.
15
Turns Off During Normal Operation,
If:
SBV6220 is unplugged
Downstream channel is lost
Upstream channel is lost
IP registration is lost
Connected during a phone call and does
not blink, telephone connection is lost
AC power is not present
B
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