Can extranet users on the U1980 register with the gateway through the VPN?

If you want to log in to and manage the firewall through external IP addresses, try to configure address/port mapping on the management PC and map the login address of the firewall to an external IP address.

After a static IP address is manually assigned to a phone, the phone fails to register with the gateway. Both the account and password are correct. The network between the SIP server and phone is disconnected (because the VLAN or 802.1x setting is incorrect). On the login screen of an eSpace 79XX series phone, choose Apps > Advanced > Network > Network Access, and set 802.1x or VLAN parameters. If the network between the SIP server and phone is normal, but the SIP server address is in domain name format, the registration fails because the DNS server address is not set on the phone. Set the DNS server address correctly.

No. Only one IP address can be configured for one network port for user login and registration .

The U1980 uses the 6 U (1 U = 44.45 mm) standard subrack, and its dimensions (H x W x D) are 264 mm x 436 mm x 420 mm.

After a static IP address is manually assigned to a phone, the phone fails to register with the gateway. Both the account and password are correct. The network between the SIP server and phone is disconnected (because the VLAN or 802.1x setting is incorrect). On the login screen of an eSpace 79XX series phone, choose Apps > Advanced > Network > Network Access, and set 802.1x or VLAN parameters. If the network between the SIP server and phone is normal, but the SIP server address is in domain name format, the registration fails because the DNS server address is not set on the phone. Set the DNS server address correctly.