Canon LBP7660Cdn Manual page 466

Multicast discovery
This is a function that searches for certain devices using Service Location Protocol (SLP).
By using the multicast discovery function, you can search for only the devices whose values in [Scope Name] are
verified, using the service location protocol (SLP) from utility software, such as NetSpot Device Installer.
When configuring the SNTP Settings
NOTE
When the check box for [Use SNTP] is selected
[Check NTP Server Connection] is displayed on the [TCP/IP Settings] page on the [Network]. When [Check NTP Server
Connection] is clicked, the printer communicates with the specified NTP server, and the result of the communication is
displayed in [NTP Server Connection Check Result].
[OK] is displayed if the printer communicated with the NTP server successfully, and [Error] is displayed if the printer
could not communicate with the NTP server due to any reason such as a setting mistake or communication error.