What is CS-MGW (Circuit-switched media gateway)?

The CS-MGW is liable for bearer control. Its capacities incorporate Bearer control, Bearer channel termination, Media conversion and payload processing, and Mobile-specific functions. The prerequisites for the bearer control are set in the (G)MSC-Server. The CS-MGW gets this data. The CS-MGW decides whether it can make bearers accessible in accordance with the QoS parameters set. In Media conversion and payload processing,
If the CS-MGW is interfacing with UTRAN, voice data should be handled. The UMTS-specific voice codec is found in the MGW. A CS-MGW should also assist mobility-specific attributes, like handover procedures.