| Protocol | Application | Physical Layer | Data Rate | Typical Command Set | |----------|-------------|----------------|-----------|----------------------| | ccTalk | Vending (Europe) | 2-wire RS-232 | 9600 bps | Poll, Stack, Reject, Inhibit | | MDB | Vending (NA) | 9-pin D-sub, 24V | 9600 bps | Master-slave (VMC driven) | | Pulse | Legacy retrofit | TTL level shift | N/A | Simple accept pulse per denomination | | Serial TTL | Gaming/Casino | 5V UART | 19200 bps | JCM extended (encrypted) |
[5] JCM Co., Ltd. (2022). “Touch bill validator with capacitive pre-insertion detection.” US Patent Application US20230215162A1.
[4] O’Brien, M. (2024). “Reliability analysis of currency validators in high-volume casino operations.” Journal of Gaming Technology , 12(3), 45–62.
