The satirical term mocking the annoying cold callertelesales people and companies involved who outsource western based companies call centres to India as a money saving practice.
These call centres will often ring you up uninvited and attempt to sell you a product, such as an internet service even though they don't have a firm grasp of the English language.
The phrase can also be attributed to the UK television show Fonejacker, who impersonates such a person as a prank caller.
Common Internet Service Proviers: Earthlink, Verizon, Comcast, AOL, MSN, Adelphia, Bell Atlantic (now Verizon, unfortunately), Cox, Road Runner, NetZero, Joi, Juno, People PC, etc.