Jaime (te voy a borrar el nombre de tanto usarlo..

) aquí tienes una captura de pantalla del lefebure teóricamente conectado:
Y aquí un par de capturas de sentencias nmea, una concectada a un servidor ntrip y otra al ntrip de Zuera, a ver si ves si realmente está conectado o no:
$GPRMC,100412.000,A,4137.9538,N,00045.1639,W,0.00,142.98,051111,,,A*73
$GPVTG,142.98,T,,M,0.00,N,0.0,K,A*0B
$GPGGA,100412.000,4137.9538,N,00045.1639,W,1,09,1.0,240.5,M,50.1,M,,0000*4D
$GPGSA,A,3,30,21,31,29,16,06,03,25,18,,,,1.6,1.0,1.3*33
$GPGSV,3,1,12,03,19,268,28,05,06,036,,06,34,269,25,13,03,321,17*7F
$GPGSV,3,2,12,16,35,308,27,18,12,135,41,21,69,126,43,23,02,297,26*79
$GPGSV,3,3,12,25,13,121,46,29,35,061,24,30,83,107,35,31,45,210,38*70
$GPGLL,4137.9538,N,00045.1639,W,100412.000,A,A*47
$GPRMC,100413.000,A,4137.9538,N,00045.1639,W,0.00,142.98,051111,,,A*72
$GPVTG,142.98,T,,M,0.00,N,0.0,K,A*0B
$GPGGA,100413.000,4137.9538,N,00045.1639,W,1,09,1.0,240.5,M,50.1,M,,0000*4C
$GPGSA,A,3,30,21,31,29,16,06,03,25,18,,,,1.6,1.0,1.3*33
$GPGSV,3,1,12,03,19,268,28,05,06,036,,06,34,269,25,13,03,321,17*7F
$GPGSV,3,2,12,16,35,308,28,18,12,135,41,21,69,126,43,23,02,297,26*76
$GPGSV,3,3,12,25,13,121,46,29,35,061,25,30,83,107,35,31,45,210,38*71
$GPGLL,4137.9538,N,00045.1639,W,100413.000,A,A*46
$GPRMC,100414.000,A,4137.9538,N,00045.1639,W,0.00,142.98,051111,,,A*75
$GPVTG,142.98,T,,M,0.00,N,0.0,K,A*0B
$GPGGA,100414.000,4137.9538,N,00045.1639,W,1,09,1.0,240.5,M,50.1,M,,0000*4B
$GPGSA,A,3,30,21,31,29,16,06,03,25,18,,,,1.6,1.0,1.3*33
$GPGSV,3,1,12,03,19,268,27,05,06,036,,06,34,269,25,13,03,321,17*70
$GPGSV,3,2,12,16,35,308,27,18,12,135,40,21,69,126,43,23,02,297,27*79
$GPGSV,3,3,12,25,13,121,46,29,35,061,25,30,83,107,35,31,45,210,37*7E
$GPGLL,4137.9538,N,00045.1639,W,100414.000,A,A*41
$GPRMC,100415.000,A,4137.9538,N,00045.1639,W,0.00,142.98,051111,,,A*74
Y al de zuera:
$GPRMC,100637.000,A,4137.9538,N,00045.1639,W,0.00,157.32,051111,,,A*72
$GPVTG,157.32,T,,M,0.00,N,0.0,K,A*0F
$GPGGA,100637.000,4137.9538,N,00045.1639,W,1,09,1.2,240.5,M,50.1,M,,0000*4A
$GPGSA,A,3,30,21,31,29,16,06,03,25,18,,,,1.8,1.2,1.3*3F
$GPGSV,3,1,12,03,20,268,23,05,06,036,,06,35,269,30,13,03,320,*7C
$GPGSV,3,2,12,16,36,308,25,18,12,135,45,21,69,123,44,23,02,296,*7B
$GPGSV,3,3,12,25,12,122,44,29,34,061,25,30,82,113,37,31,44,210,41*79
$GPGLL,4137.9538,N,00045.1639,W,100637.000,A,A*42
$GPRMC,100638.000,A,4137.9538,N,00045.1639,W,0.00,157.32,051111,,,A*7D
$GPVTG,157.32,T,,M,0.00,N,0.0,K,A*0F
$GPGGA,100638.000,4137.9538,N,00045.1639,W,1,09,1.2,240.5,M,50.1,M,,0000*45
$GPGSA,A,3,30,21,31,29,16,06,03,25,18,,,,1.8,1.2,1.3*3F
$GPGSV,3,1,12,03,20,268,23,05,06,036,,06,35,269,30,13,03,320,*7C
$GPGSV,3,2,12,16,36,308,25,18,12,135,45,21,69,123,44,23,02,296,*7B
$GPGSV,3,3,12,25,12,122,44,29,34,061,25,30,82,113,37,31,44,210,41*79
$GPGLL,4137.9538,N,00045.1639,W,100638.000,A,A*4D
$GPRMC,100639.000,A,4137.9538,N,00045.1639,W,0.00,157.32,051111,,,A*7C
$GPVTG,157.32,T,,M,0.00,N,0.0,K,A*0F
$GPGGA,100639.000,4137.9538,N,00045.1639,W,1,08,1.2,240.5,M,50.1,M,,0000*45
$GPGSA,A,3,30,21,31,29,06,03,25,18,,,,,1.8,1.2,1.3*38
$GPGSV,3,1,12,03,20,268,23,05,06,036,,06,35,269,30,13,03,320,*7C
$GPGSV,3,2,12,16,36,308,,18,12,135,45,21,69,123,44,23,02,296,*7C
$GPGSV,3,3,12,25,12,122,44,29,34,061,25,30,82,113,37,31,44,210,41*79
$GPGLL,4137.9538,N,00045.1639,W,100639.000,A,A*4C
$GPRMC,100640.000,A,4137.9538,N,00045.1639,W,0.00,157.32,051111,,,A*72