AASTRA Office 10 User manual - Manual (Page 23)

Troubleshooting
23
Troubleshooting
Your call partner cannot hear you or you cannot hear your call partner
Make sure the handset cord is correctly plugged into both the handset and the phone (see "Installation").
Handset off-hook, no dialling tone
Make sure the phone cord is correctly plugged in to both the phone and the phone socket and that the
channel selector is in the end position (see "Installation").
Indicator LED is lit in standby mode
The system administrator has logged a different phone type onto the system or a number has not been
assigned to the phone. Contact your system administrator.