HP Pavilion ZV6001 Hardware And Software Manual page 130

Modem and Networking
Noise suppression circuitry prevents interference from television
and radio reception.
When you connect a modem cable with noise suppression
circuitry 2, orient the circuitry end 1 of the cable toward
notebook.
✎
Modem cables vary in appearance by region and country.
10–2 Hardware and Software Guide