Telecom New Zealand has announced that it plans to issue a credit to customers of its Go Large unlimited broadband internet tariff after discovering problems with its traffic management systems. The Go Large plan offers unlimited data transfer, with traffic limitations supposedly placed only on certain applications to reduce traffic congestion at peak times. However, Telecom says that the traffic management system has been affecting all Go Large traffic since 8 December and it will therefore issue a refund of fees paid between that date and the end of February. The firm says refunds are expected to total between NZD7.5 million and NZD8.5 million, with the average customer getting up to NZD160. Telecom no longer offers the Go Large plan to new customers and all its broadband packages now have monthly data caps.