I think that I have now fixed the problem. It appeared to be the PCMCIA slot not being properley recognised as a COM port. I uninstalled that and the modem and after reinstallation it now seems to work OK.
Hands-on: Acer Predator Triton 700 review
D&AD Awards 2017: see the best design, advertising, illustration, animation and VR of the past year
How to lose weight with an Apple Watch
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.