Operation and Maintenance
232
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
6. 5. 2. 5
Malfunction of the Mitel DECT radio unit
Tab. 94
Malfunction of the Mitel DECT radio unit
6. 5. 2. 6
Malfunctions of Mitel DECT cordless phones
Tab. 95
Malfunctions of Mitel DECT cordless phones
Error description
Error cause / error handling
No radio connection in a coverage area.
Check LED on radio unit:
LED is flashing red (short red phase):
• Check power supply / line length of DSI bus cable
LED is flashing red (long red phase):
• Check DSI bus cable
• Unplug DSI bus cable for one minute, then reconnect
LED is flashing green (long green phase):
• All B channels busy
Radio unit not activated.
LED on radio unit is flashing red/green (various patterns):
• Radio unit in startup phase
LED on radio unit is flashing red (long red phase):
• Radio unit defective
If LED on radio unit not flashing:
• Check trunk connections
• Radio unit defective
• LED of the radio units deactivated throughout the system
Error description
Error cause / error handling
No display.
• Switch cordless phone on and test
• Replace or charge battery
No radio link to radio unit; no aerial symbol.
Check coverage area (within range of a radio unit).
• Check radio units in this section
Cordless phone not registered with the system
• Cordless phone registered
Impossible to dial.
Keypad blocked (keylock)
• Unlock keypad
No dial tone.
• Check radio units in this section
Poor connection quality (echo effect).
• Turn back loudspeaker opposite (for call parties)
Cordless phone beeps approx. every 10 s during a
call (or in standby) while battery indicator is flashing.
• Replace battery immediately, either after or during the call
(see cordless phone user’s guide)
Call breaking up.
You are moving out of range.
• Find a location with a better radio contact
