PLANET ICF-1700 - Manual (Page 51)

Previous page: When added to the incoming call firewall number
more than one page and need to flip up and down will show" a page"
button.
Next page: When adding “Call firewall” number more than one page
will display "Previous page" button.
M/N: Where M represents the current number of pages, N represents
the total number of pages.
51