(Telecompaper) Ericsson has renewed its commitment to the OSS interoperability initiative (OSSii) by signing an extended memorandum of understanding (MoU) with Huawei and Nokia. Initiated by Ericsson, Huawei and Nokia in May 2013, the OSSii promotes interoperability between different OSS vendors' equipment. It aims to enable operators to simplify network operations, reduce overall integration costs and accelerate time-to-market for new services. The new MoU adds Management and Orchestration (MANO) interfaces and IP Multimedia Subsystem (IMS) domains to the original OSSii agreement. MANO is an ETSI-defined framework for the management and orchestration of resources in a cloud data centre. IMS is a core network solution that delivers rich real-time communication services, such as HD voice and Wi-Fi calling, for consumer and business users over any access network and for any device type.