Time Warner Cable (NYSE:TWC) is taking aim at unwanted telemarketing and robocalls. The company is launching an online sign up process for Nomorobo, a third-party call-blocking application, for TWC phone customers. TWC has integrated the feature into its home phone management Website, VoiceZone.

Nomorobo automatically blocks phone calls from many telemarketers and robocallers. The service takes advantage of TWC's "Answer Anywhere" technology, a feature designed to allow incoming calls to be routed to up to five different telephone lines. The call rings in the home and simultaneously at Nomorobo's servers. If the number is on a "blacklist," the call will end after one ring.