VTech SIP Contemporary Series User Manual page 22

Question
The Speed Dial key does not work at all.
The telephone cannot register to the SIP
network server.
The LOW BATTERY LED illuminates on the
cordless handset.
Suggestions
• The Speed Dial key may not be properly
programmed. Refer to the SIP Phone
Configuration Guide for details.
• Make sure your network is providing
Power over Ethernet (PoE).
• Make sure the initialization and system
registration process completes (pages
9 and 14).
• If there is an error during the initialization
and system registration process, the
key flashes twice every second.
Disconnect the Cat-5 network cable from
the network wall jack and connect it back
into the network wall jack with Power over
Ethernet (PoE) to start the initialization
and system registration process again.
• Place the cordless handset in the
telephone base or charging stand for
recharging.
• Remove the battery and then install it
again, and use it until fully depleted.
Then charge the cordless handset in the
telephone base or charging stand for up
to 16 hours.
• If the above measures do not correct the
problem, replace the battery.
EN - 22