To interface the TB-5 with external (3rd party) equipment, one should be familiar with the pin-out.
The TB-5 is using our standard wiring used with our ITC-100 intercom and is as follows:
 
| VIDEO CHANNEL | 
LIVE RED [PIN]  | 
PREVIEW GREEN/AMBER [PIN]  | 
|---|---|---|
| 1 | 1 | 3 | 
| 2 | 6 | 8 | 
| 3 | 11 | 13 | 
| 4 | 5 | 15 | 
PIN 4, 9 and 14 are connected to GND