satellite modem

A Satellite SID will be your Serial Identification Number. Its much like an IP address that designates your modem. This is used so that your Satellite provider can keep track of who is requesting service from them. Your Modem will send the SID to the satellite which will then verify that modem should have service. If you cancel your payments they will block that SID which is tied to your Name and Account.

Cable,phone,satellite.

Modem

Satellite Internet does not use a cable modem. The service doesn't use cable or phone wiring in the house. There is a satellite on the property and wiring that brings the service into the house. The provider would supply the necessary peripherals to connect to the Internet.