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16.3.2 Registering at remote SIP server
To use the IP Phone, it doesn’t need to be registered to a proxy. You can make call to another device in your local
network by entering its hostname or IP address (ex. sip:toto@192.168.1.23). This also works on the public internet
provided that both ends have public IP addresses or appropriate firewall rules. On the public internet, because of
dynamic IP addresses and firewalls, direct calls may not be possible so there is possibility you may need to register to a
proxy. To register a SIP proxy account, go though the following steps:
o Select your proxy account from drop down list of accounts. Notice that, the first item in the list is your
local default identity and you can’t register it.
o Press to start registration process.
o If required, enter the proxy account password in prompt.
o Wait for the registration process to end. If registration is successful, the icon is displayed next to
proxy account. indicates the registration process failed.
o To unregister press button and wait for the unregistartion process to end.