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
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.
15Model 480i SIP User Guide
