OSDP provides the following benefits:

• OSDP is digital and bidirectional, which facilitates diagnosing communication and/or alarm problems when devices aren't responding. 

• OSDP is encrypted, whereas the Wiegand interface isn't and can be easily hacked. 

• OSDP works on only 2 wires, whereas the Wiegand interface requires up to 6 wires. 

• OSDP can run on a  cable distance of approx. 1.2Km between the field devices, whereas the Wiegand interface only supports distances up to 150m.