Power has been restored to more than 2000 properties in Auckland after a truck brought down a phone line.

Some 2010 properties and multiple traffic signals across Otahuhu were affected by this morning's power cut after a rubbish truck snagged a telecom wire.

Vector immediately shut down supply to the surrounding area to investigate the accident and confirm the downed line was not connected to the electricity network.

A spokeswoman for the lines company said the power supply had now been restored to the area.

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Auckland Transport tweeted that the outage at Otahuhu had caused multiple traffic signals to go out.

"Please follow give-way rules and take care."

The Vector website said 2010 properties were affected and the outage was reported at 8.53am and it was expected to be restored at 10.53am.