Hi there!
1. Determine the problem of the non-network cable and telephone contact through the exclusion method.
2. Compare the phone configuration parameters with other regional eSpace phones. The main difference between the phone parameter configurations is the VLAN value.
3. Compared with the regional VLAN planning table, there is no problem with the phone configuration in the problem area.
4. Check the configuration of the access layer switch. Note that the MAC address configuration error may cause the phone not to obtain an IP address automatically.