[H] modem out of range

[Winterlight]

I got a message from COX today saying that they were performing 
upgrades on the lines in my area next week, and they noticed that my 
modem = Surfboard 2 was out of range. The upgrades may adversely 
effect my connection, and they want to send a tech out to adjust the 
lines so my modem is in range, and I don't experience any outages 
during the upgrades.

Does this make any sense to anybody? And if they want to adjust my 
lines why do they need to make an appointment?