Has the modem been set up properly for xp. It might only have default drivers installed. Check make of modem and download updated drivers from net. This helped with my intel internal modem - speed went up from 30 to 45K.
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
Comment envoyer gratuitement des gros fichiers ?