Check if the simultaneous use of multiple devices is causing IP network congestion (if using an IP digital hybrid system).
If it is a simulated external channel, it may be due to poor line quality and the operator needs to be contacted for testing.
6.4 Transfer function invalid or call incorrectly transferred
Confirm if the forwarding target number is correct and if the target terminal is in an available state.
If "Follow Me" or "Remote Forward" is enabled, make sure it is set correctly on the target phone and remember to cancel the old forwarding (FwdOff can be executed uniformly to clear all forwarding).
Check for multiple forwarding condition conflicts (such as setting both unconditional transfer and busy transfer, with unconditional transfer having the highest priority).
6.5 Message indicator light does not turn off or cannot listen to messages
If there are new messages, press the Message button to enter the voicemail. After listening to all the new messages, the indicator light should turn off. If it still lights up, try long pressing the Message key to force a refresh (supported by some systems).
If the voicemail system is busy, wait for a moment and try again. If there is a long-term abnormality, you can contact the administrator to check the status of the voicemail server.
6.6 Button unresponsive or stuck
For physical card keys, you can use a clean soft cloth to lightly press the card key position to reset it. If it is liquid contamination, power off and clean with anhydrous alcohol (operated by professionals).
If it is a software lock key (such as not exiting in programming mode), press Menu → END to exit all menu modes.
Personalized optimization suggestions
Set Interphone mode: Press the Mute key to make the LED flash, and incoming calls from the internal line will be automatically hands-free connected, suitable for open office areas. To cancel, press Mute again.
Adjust ringtone and volume: When idle, press Menu → Prog → Ring to select 16 melodies and use the navigation keys to adjust the ringtone volume.
Associate: You can associate your own phone with another phone or voicemail for one click calling. Set the target number through Menu → Prog → Assoc.
Save missed call number: If no one answers the call, press Store # before hanging up to temporarily store the number, and then press Store # to redial.
