The domestic mobile terminating access service (MTAS) is a wholesale input used by providers of fixed-to-mobile and mobile-to-mobile calls to allow their customers to call mobile subscribers. It allows consumers (either fixed line or mobile) to call mobile users. If a call made by a service provider's customer terminates on another mobile network, the service provider pays the other network's owner for the MTAS.
On 19 March 2009, the ACCC released final pricing principles and indicative prices for the mobile terminating access service for the period of 1 January 2009 to 31 December 2011.
In 2007, the ACCC developed a 'bottom-up' cost model for the MTAS. This was part of an extensive consultation process which began with the Mobile Services Review in 2003.