AASTRA 51i User Guide

86 Model 51i IP Phone User Guide

Troubleshooting Solutions

Why is my display blank?

Ensure that power is being provided to your phone. Make sure your phone is plugged 
into a power source.

Why is my speakerphone not working?

If you press the 

 button and the speaker 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 handset by pressing 

.

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 51i 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 51i 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.

How do I find the IP address of my phone?

Instructions on where to find the IP address of your phone can be found in this guide 
in the section, 

.