Can I still use my Analog 28.8 or 56K Modem if I have a Cable or xDSL modem?
Usually, if you have a 2-Way Cable Modem or xDSL modem installed, you will never use your analog modem again! Most Cable systems will use the Cable or xDSL connection to send and receive data, thus eliminating the need for an Analog modem. You should keep the modem, and keep it plugged in, just in-case your Cable or xDSL Provider goes offline for any reason, you may need the analog modem as a backup.