Προβλήματα Εξοπλισμού

The Do Not Disturb (DND) feature may be enabled on your device.

Please check the following:

• Verify that the Do Not Disturb (DND) mode is disabled in your device settings.
  
• If DND is already disabled, ensure that your device is properly connected to the internet.

If the issue continues, please contact our customer technical support team for further assistance.

Windows (English versions)

• Open Command Prompt (Start → Run → type cmd → Enter).
• Type the following command:
  ipconfig /all | findstr Gate
• Look for the line labeled Default Gateway.
• The displayed numeric value (usually in the format 192.168.x.x) is your router’s IP address.

Windows (Greek versions)

• Open Command Prompt (Start → Run → type cmd → Enter).
• Type the command:
  ipconfig /all | findstr Πύλη
• Locate the line marked Προεπιλεγμένη Πύλη.
• The numeric value shown is your router’s IP address.

macOS (all versions)

• Open Terminal (search via Spotlight).
• Enter the command:
  ifconfig
• Locate the Default Gateway entry.

The displayed numeric value is your router’s IP address.

In some cases, technical support may ask you to reboot your phone.

You can restart your phone by:

• Disconnecting the power supply.
• Waiting a few seconds.
• Reconnecting the power.
  

Some devices also allow restart directly from the keypad or via their web management interface.

Please refer to your device manual for detailed instructions.

To maintain the security of a self-hosted PBX system, administrators should follow these minimum best practices:

• Avoid assigning a public IP address directly to PBX interfaces whenever possible.
• If a public IP is required, use a firewall allowing only:
  • Outgoing connections
  • Established and related incoming traffic

   

• Avoid using port forwarding (DNAT) unless strictly necessary, as this may expose your internal network to attacks.
• Do not allow the default Asterisk context to accept calls.
  
• For FreePBX-based systems, ensure that “Allow Anonymous Inbound SIP Calls” is disabled.

These measures help reduce security risks and prevent unauthorized access.

Many VoIP issues are caused by the SIP Application Layer Gateway (SIP ALG) feature being enabled on routers.

SIP ALG may interfere with SIP signaling and cause problems such as:

• One-way audio
• Call drops
• Registration failures

• Inconsistent call behavior

Recommended solution:

• Access your router settings.
• Locate the SIP ALG option (often under NAT, Firewall, or Advanced settings).
  
• Disable SIP ALG.
• Save settings and restart the router if required.

If you are unsure how to disable SIP ALG, contact your network administrator or ISP.