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 
 
 
 
 1. Open the intercom configuration interface 
 
 
 
 2. Locate the SIP account or registration settings 
 
 
 
 3. Compare the username and password with the CoCoS device configuration 
 
 
 
 4. Correct any mismatches and save the configuration 
 
 
 
 
 
 References 
 
 
 Troubleshooting TLS Transport Registration Issues 
 
 Unstable registration status