Detailed Product Description ZH-5000A IEEE1588 Ethernet Switch1. Description ZH-5000A Ethernet switch supports 3 models of IEEE-1588 ... Peer to Peer (P-to-P) transparent clock. Ethernet switch can configure differently according to customer needs, meanwhile, ... , 220KV, 500KV and above substation, power plants, industrial control, telecommunication systems where strictly requires the high precision ...