Why is my Mitel SX-200 ICP Conference System phone service lost and showing a MOSS alarm?
S
Sydney MorrisAug 17, 2025
This issue occurs when a database from another system with different MOSS options has been installed in the controller. To resolve this, enable the correct options to restore phone service and clear the MOSS alarm.
L
lori41Aug 20, 2025
Why can't I make external calls on my Mitel SX-200 ICP?
T
Tanner MccartyAug 20, 2025
There are several reasons why you might be unable to make external calls. First, the service provider may not have connected the line. To check this, unplug the cable connecting the trunk to the LS trunk port on the controller, then plug a standard analog phone directly into the service provider’s line jack and listen for a dial tone. If there's no dial tone, contact your service provider. Another reason could be faulty programming of the trunks, make sure the trunks are programmed correctly. Finally, there might be a faulty Analog Main Board or Analog Option Board; in this case, power down the controller and replace the suspect board.
A
Ashley WardAug 23, 2025
What to do if my Mitel SX-200 ICP IP phone won’t boot?
G
grahamdwayneAug 23, 2025
If your Mitel Conference System IP phone won’t boot, and the display is stuck at DHCP Discovery or an IP address, it might be caused by a few things. First, the phone may not be connecting to the DHCP server. You can try to recycle the power to reboot the phone, verify that you're using a straight-through cable instead of a crossover cable to connect the IP Phone to the controller, or try another phone. Another cause may be that the IP Phone Licences have been exceeded, you should purchase more licences. Finally, it could be due to a failure to reset the controller following the installation of new system software; in this case, reset the controller.
S
Samuel GonzalezAug 26, 2025
Why can't I make external calls on my Mitel SX-200 ICP and the phone shows call barred?
I
idanielsAug 26, 2025
If you can’t make external calls and your Mitel Conference System phone displays 'call barred', it's likely due to a restricted Class of Restriction (COR) or incorrectly programmed Automatic Route Selection (ARS). To fix this, identify the numbers dialed, then check the route used in ARS. Remove the COR number from the COR group table in COR assignment used in the route, or change the COR group number in the route assignment form, or modify ARS programming to allow the call.
D
David CamposAug 28, 2025
What to do if I have no dial tone on my Mitel SX-200 ICP set?
Z
Zachary LaneAug 28, 2025
If you have no dial tone on your Mitel Conference System set, there are several potential causes. The set may not be programmed; if so, program the extension in CDE. There could be wrong wiring; check the wiring between the phone jack and the Peripheral Cabinet, MDF, etc. The handset wire could be faulty; try replacing the handset cord, the handset, or the set itself. It is also possible that the circuit is manbusy, in which case you should use the Maintenance DIAGNOSTICS > RET-TO-SVC command. Finally, the circuit might be locked out; verify the wiring between the phone and the patch panel.
M
Matthew DavisAug 31, 2025
What to do if my Mitel SX-200 ICP Conference System sets cannot receive DID calls?
C
Crystal CoffeyAug 31, 2025
If your Mitel Conference System sets cannot receive DID calls, it may be because Non-DID is enabled in the Station Service Assignment form. To resolve this, disable non-DID in the set’s COS and check for NMX fields in Form 15 for valid entries.
A
Angela TaylorSep 3, 2025
Why do Mitel SX-200 ICP Conference System sets take 10-12 seconds to receive incoming calls?
R
russellshellySep 3, 2025
If your Mitel Conference System sets are taking 10-12 seconds to receive incoming calls, the ANI/DNIS number delivery trunk option might be enabled in the T1 trunk’s COS. To solve this, disable the ANI/DNIS number delivery in the trunk’s COS. You can assign an unused COS to verify if this is the problem.
H
Heather ArmstrongSep 5, 2025
What to do if none of my Mitel SX-200 ICP Conference System sets are responding?
J
jeffrey15Sep 5, 2025
If none of the Mitel Conference System sets are responding, the problem might be with the controller. Check for the following: no alarms, the program reboot is scheduled, there are no error logs, and the database is backed up.
S
shannon53Sep 8, 2025
Why does the Mitel SX-200 ICP voice mail system resets itself?
K
Kimberly BrownSep 8, 2025
The voice mail system has the ability to automatically reset itself in the event of a critical error. Also, the SX-200 ICP automatically resets daily at 3:00 AM.