Intercom Not Registering (Device Not Available)

Symptoms

The intercom device does not register in CoCoS and remains in a not available state.

• Ping is successful but the device is not available
• Ping is unsuccessful
• Intercom shows Not Registered after configuration
  
• Intercom does not appear online in CoCoS
  

Details

This issue can be identified as follows:

• The intercom is configured and saved in its web interface
• The device responds to network tests (such as ping)
• In CoCoS, the device remains not registered
• The status does not change over time

This indicates that the device can be reached over the network, but registration to the system is not successful.

Cause

Incorrect Credentials

The username or password configured in the intercom does not match the credentials configured in CoCoS.

This can happen when:

• Credentials are copied incorrectly
• A wrong device configuration is used

Incorrect SIP Transport or Port

The configured SIP transport (for example UDP or TCP) does not match the configuration in CoCoS.

Additionally:

• The selected port may be incorrect
• The selected port may be blocked by the network

Incorrect Server Address

The intercom is trying to register to the wrong server address.

Examples:

• Using an external IP address from an internal network
• Using an internal IP address from an external network

Network Restrictions

Even when ping is successful, other network issues may block registration:

• Firewall rules blocking SIP traffic
• NAT configuration issues
• Required ports not open

Solution / Resolution / How To

Verify Credentials

References

• Troubleshooting TLS Transport Registration Issues

• Unstable registration status