Aastra 5370 User Manual Aastra 5370/5370ip (Office 70/Office 70ip) - Page 75
Troubleshooting, Malfunctions
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Further information Troubleshooting This section contains a few tips on how to operate your phone if you encounter any problems. ■ Malfunctions 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 chapter "Installation and First-Time Operation", page 77). Handset off-hook, no dialling tone, no display Make sure the phone cord is correctly plugged in to both the phone and the LAN socket (see chapter "Installation and First-Time Operation", page 77). Display reads "Not configured", handset off-hook, no dial tone Your phone has not been assigned a call number. Contact your system administrator for more information. The display reads: "Trying to register" The telephone cannot be registered. Contact your system administrator for more information. Display is working, but connection is not possible Your phone may be locked. Unlock your phone (see chapter "Unlocking Your Phone", page 38). Freely configurable keys cannot be configured. The configuration may be locked. Unlock your phone (see chapter "Unlocking Your Phone", page 38). The key for a reconfiguration may be locked in the system. Contact your system administrator for more information. The expansion key module Aastra M530⁄M535 possibly has not sufficient power supply. Contact your system administrator for more information. Insufficient display contrast The setting for the display contrast is inadequate. Change the setting (see Chapter "Setting the display", page 54). Impaired sound quality during hands-free operation The sound quality can be affected if the volume is too loud - turn down the volume. If the sound quality fluctuates, contact your system administrator. Note: For all other messages, faults and questions you may have, contact your system administrator. 75 eud-0830/2.1 - I7.7 - 10.2008