Member for Gilmore Ann Sudmalis urged frail or elderly people relying on the system to check with their internet service provider before signing a contract.

"There are some internet service providers who do not have the back-up systems and the only way to change that is by changing the ISP provider," she said. "I'm so sympathetic [to those in that situation] because you would have thought it would be the same no matter who your provider is."

VitalCall pendants have a button the user can press in the event of a fall or medical emergency, or when assistance is required. A signal is sent from the pendant to a base unit, which then calls a response centre.

The centre assesses the resident's needs and sends help if necessary.

Mrs Sudmalis said three constituents had raised the issue with her, saying they were concerned about their ability to live independently.

She also said residents could ring the free NBN hotline to find out what information they should seek from their service providers before signing up.

"They're things most people don't know to ask," she said.

The hotline is available for all NBN-related problems.

Mrs Sudmalis said residents could also contact the Telecommunications Industry Ombudsman, but must first log a complaint with their service provider.

The free call number for NBN Co is 1800 881 816. The Telecommunications Industry Ombudsman can be reached on 1800 062 058.

Telstra customers can access help directly from Mrs Sudmalis' office by calling 4423 1782.

However, Mrs Sudmalis said her meeting with NBN Co was "very productive" and the internet wholesaler was determined to iron out problems for a smoother rollout.