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Troubleshooting Solutions
41-001451-00 REV00 – 07.2011 200
Troubleshooting Solutions
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 6735i Installation Guide
for details.
Why is my speakerphone not working?
If you press the button and the speaker light flashes 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 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
. See the section “Set Audio” on page 31 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 6735i 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 6735i 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 Headset” in the Aastra 6735i Installation Guide for information.
What are services, and how do I use them?
Services on the IP phone include:
• XML Applications
• Callers List
• Directory List
• Voicemail
See the section, “Services Key” on page 102 more information about the options available under "Services".
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, “Finding Your Phone’s
IP Address” on page 21.
Why does my phone display the “No Service” message?
The phone displays the “No Service” message if the SIP settings have not been set up correctly.