Specification of ProGate cable. ProGate has 2 H/W.(4 Generation and 3 Generation)
1. ProGate H/W 4 Generation
4 Generation have a PTT-IN and PTT-OUT for COR.
2. ProGate H/W 3 Generation
3 Generation have only a PTT-OUT switch. So there is only SAD/VAD for PTT-IN detection.
3. How can you distinguish which H/W is?
You can find it on system page in adminWeb of ProGate.
If there is no information, it is 3 Generation.