Hosted by CPSG, please join us on Wed, Sept, 15, 2021 at 11AM ET, 10AM CT, 9AM MT, 8AM PT. What is it. Why you should understand it. Tools you will need. Convert legacy Wiegand readers to SIA’s OSDP 2-wire protocol. Due to advances in technology, the wiegand protocol can easily be hacked, disabling your access control - or worse.