The ZMM220 device must be assigned an IP address on your local network. Your computer must be on the same subnet.
The ZMM220 is a widely utilized core hardware platform developed by ZKTeco, found in numerous biometric access control terminals, time attendance clocks, and face recognition devices. For network administrators, system integrators, and security professionals, managing these devices often requires low-level command-line access via Telnet.
Telnet is an unencrypted protocol. It is highly recommended to change these defaults immediately upon login to prevent unauthorized access to the biometric data or system configuration. Manufacturer Support: If these do not work, consult the specific ZKTeco Support