Troubleshooting147Call IssuesWhy can’t I receive calls? Check the SIP registration with your system administrator. Check that DND (Do Not Disturb) mode is deactivated on your phone. Refer to Do NotDisturb (DND) on page 86. Check that call forward is disabled on the phone. Refer to Call Forward on page 87. Check whether the caller number is stored in the blacklist directory. Refer to Blacklist onpage 50.Why can’t I record calls? Ensure that the USB flash drive is inserted to the USB port on the phone. Ensure that the USB flash drive inserted is compatible with the phone. For moreinformation, contact your reseller. Check if there is enough free space (greater than 2 minutes) on the USB flash drive. TapMenu->USB->Storage Space.Audio IssuesWhy doesn’t the phone ring?Check the ringer volume on the phone. To adjust the ringer volume setting, tap the Volume keywhen the phone is on-hook and idle. For more information, refer to Volume on page 37.Why does the phone play a tone when hold? How to disable it?When there is a call is on hold, the phone will play a hold tone every 30 seconds. Play hold toneis enabled by default. Play hold tone and the interval of playing a hold tone are configurable viaweb user interface only.To configure the call hold tone and call hold tone delay via web user interface:1. Click on Features->General Information.2. Select the desired value from the pull-down list of Play Hold Tone.3. Enter the desired time in the Play Hold Tone Delay field.
