remote database and cursor

I have the procedure below. It retrieves rows from a table at a remote database (over WAN link) and inserts into a local table. My question is, at Point A (where the cursor to remote table has been opened) is it possible for a glitch in the WAN to cause my procedure to fail? Or is it still going back to the remote table to get a number of records at a time within the loop?
Thanks!

        PROCEDURE myproc IS

 		cursor	mycur is
			select 	*
			from
				triton.mytable_at_PDCDB r
			where
				col1 = 'A';

		dblink_down	exception;


                                .........

                                .........

	BEGIN

		begin
 			open mycur;
		exception
			when others then
				raise dblink_down;
		end;

                                -- Point A

 		loop
			fetch mycur into rec;
			exit when mycur%NOTFOUND;

			begin
                                                       for each row
                                                       insert into
local table
                                                       .............
                                                       .............
			end;
 		end loop;

	 	close recset;

	EXCEPTION
		when dblink_down then
		        dbms_output.put_line('.....');

		when others then
		        dbms_output.put_line('.....');

	END myproc;