Snom M500/M58/M55 Common Issues Troubleshooting Guide 

1. Check if the device is enabled on speaker mode by verifying the presence of a speaker icon on the main screen. Use the speaker button to toggle the feature off.
2. Deregister the handset:
   • Press the MENU/Confirm key.
   • Press and select (Settings), then press OK.
   • Scroll to User settings, and press Enter.
   • Scroll to Registration, and press Enter.
   • Scroll to Deregistration, and press Sel. The “Deregistration” screen appears, showing the list of registered handsets. Your handset is indicated by **.

   

    

   • Press or to select the handset you want to deregister, and press Sel.
   • Enter the PIN and press OK. The default PIN is 0000. The handset beeps and displays “Handset is deregistered.”
3. Register the handset: 

• Make sure the base station is connected to power and the network. 
• If the handset is displaying the following screen: IPEI and REG, proceed with REG. Select Auto-Reg within the sub-menu only if the custom config portion contains the new IPEI number. This may take up 2-3 minute even if the phone displays Registered.

• If the handset is displaying the following screen: Press Cancel. If the handset displays “Registration failed.” Press OK. If the handset displays “Device not registered to base station.”  

• On the “Device not registered to base station.” screen, press Reg.  

• With LINK key on Base highlighted, press Sel. The handset displays the following screens (press Next) 

•  Press and hold the LINK key on the base station for four seconds. The (power) and (SIP) LEDs flash green.  

• Press the # key on the handset to begin registration. The handset displays “Registering... Please Wait.” If registration is successful: The handset beeps and displays “Handset Registered,” and then displays the idle screen. 

• Check handset cabling and ensure the handset cable is securely plugged into the handset receiver port which has the phone icon. 

• Deregister the desktop. 

• Register the desktop. 

1. Confirm the IPEI number of the device with the custom config section. 
   • M55 Handset: Check label under the battery. 
   • M58 Desktop: Navigate to Settings > Status and locate the IPEI. 
2. Reboot the phone and proceed with auto-register. If it takes too long, press Cancel. 
3. Manually register via the LINK key on the base station. 
   • On the “Device not registered to base station.” screen, press Reg.  
   • With LINK key on Base highlighted, press Sel. The handset displays the following screens (press Next) 
   • Press and hold the LINK key on the base station for four seconds. The (power) and (SIP) LEDs flash green.  
   • Press the # key on the handset to begin registration. The handset displays “Registering... Please Wait.” If registration is successful: The handset beeps and displays “Handset Registered,” and then displays the idle screen. 

1. If call logs are normal hang up causes, power cycle the Snom Base Station. 
2. Confirm all devices are registered. 

Helpful Registration Video: https://www.youtube.com/watch?v=RbZxE8EH65w&ab_channel=VTech%26SnomWorkshop