Network Clock Systems Network Clock Systems OneSourceTelecom (Vendor) (OP) 18 Jun 12 20:48 Looking to assist a school district in installing a IP Based Clock System. Anyone have any experience with any good input would be great. RE: Network Clock Systems wires (TechnicalUser) 20 Jun 12 10:41 American Time and Signal (www.atsclock.com) offers a wide range of master clock systems. Good support too. Depending on network design a clock VLAN might be helpful.