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Model 480i SIP User Guide
Troubleshooting
Troubleshooting
Why is my display blank?
Ensure that power is being
provided to your phone. If your
network does not provide inline
power over Ethernet, you can
obtain an additional accessory, the
Aastra PoE (Power over Ethernet)
inline power supply, to provide
power over Ethernet locally to your
phone. See the section “Connecting
to the Network and to Power” in
the Aastra 480i Installation Guide for
details.
Why is my speakerphone
not working?
If you press the d /f button
and the speaker light ßashes and
you do not hear dial tone through
the speaker phone, the Set Audio
option in the phone’s Options list
has been set up for headset use.
Press d /f a second time and if
the light goes out, the phone has
been set up to be used only with a
headset or handset. If the light stays
on steady and you hear dial tone,
the phone has been set up so that
you can alternate between the
speakerphone and the headset by
pressing d /f . See the section
“Customizing your phone” in
the 480i Installation Guide for
instructions on how to change
the Set Audio option.
Why can’t I get a dial tone?
Check for any loose connections
and that the phone has been
installed properly. For installation
instructions, please refer to the
“Installation and Setup” section in
the Aastra 480i Installation Guide
provided with your phone.
Why doesn’t my phone ring?
Check the ring volume on your
phone. It may be turned down or
turned off. To adjust the ringer
volume setting, press the volume
button when the phone is on-hook
and idle. For more information,
refer to the “Adjusting Volume
section” in the Aastra 480i
Installation Guide provided with
your phone.
Why is the light not coming on
with a new Voice Mail Message?
Your phone system or service
provider must provide “Visual”
Message Waiting service for this
function to work. Check with
your system administrator for
more information.
Why is my handset not working?
Check to ensure that the handset
cord is fully connected to both the
phone and handset. See the section
“Connecting a Handset or Head-
set” in the Aastra 480i Installation
Guide for information.
What are services, and how
do I use them?
Currently this feature is not
available on the 480i phone. How-
ever, in the future, services may
be provided by your phone system
or service provider, and will be
accessed through the Í
button. This may include services
such as Directory and Caller's List.