L M Ericsson Telefon AB’s Ericsson Radio Systems and Motorola Inc’s Cellular Infrastructure Group have signed a cross licence agreement covering all their existing and future essential Groupe Speciale Mobile digital cellular patents: the agreement also extends to the Orbitel Mobile Communications Ltd joint venture of Vodafone Group Plc and Ericsson; the companies also formally agreed to a programme that will enable Motorola’s GSM base station equipment to operate with the Ericsson GSM AXE exchanges.