The Ericsson GRU 0401 NCD 901 65/1 GPS Receiver Unit is a component used in telecommunications systems. It is designed to receive signals from Global Positioning System GPS satellites and provide accurate timing and synchronization information for network operations. The GRU 0401 NCD 901 65/1 unit is specifically designed for reliable and precise GPS signal reception, ensuring the synchronization of network elements and maintaining accurate timing for various applications within the telecommunications network.