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The device supports two telephone lines.

Phone Number: The Phone Number field displays 'Not Subscribed' when the phone is not registered or ready for use. When available, the phone number is displayed in xxx-xxx-yyyy format, but only the last 4 digits are shown.

Registration State: This state refers to the connection between the SIP server and the device for each line.

Line State: This state refers to the Phone Line state for each line.

TimeStamp: The time at which the last registration took place.

Server Address: The IP Address of the Registration Server.

Last Registration Message: Response to last Registration request, SUCCESS/FAILURE.

Last Retry Interval: The interval in seconds before a registration attempt is retried.