A still undiagnosed fault caused intermittent disruptions to Telecom’s landline, landline-to-mobile, dial-up Eftpos and possibly 111 emergency calls for two hours today, affecting an area from the Bombay Hills to the top of the North Island during the telco's peak calling period.

Telecom head of external media Mark Watts says the fault first hit at 10.40am.
Services were progressively fixed, and fully restored by approximately 12.40pm.

Mr Watts says the root cause of the fault, or how many customers it affected, has yet to be determined.