M 5401A, Dante Master Clock. Model 5401 Dante Master Clock provides accurate time signals for DanteÆ AoIP networks, it supports hundreds of Dante devices. The compatibility with PTP v1 (IEEEÆ 1588-2002) for Dante as well as PTP v2 (IEEE 1588-2008) for AES67. Input and output for external sync with BNC connector available. ?tta audio tones can be generated on the network for maintenance and installation.