The SIP voice gateway used aluminum casting, high mechanical strength and strong impact resistance.
Support SIP application, including before the call (unconditional transfer/no answer transfer/user busy transfer), call waiting, call a hotline number, call transfer (blind turn/ask), after three calls, call hold, quickly abbreviated dial, number replace rules, restrictions, call, don’t disturb, caller id, outside threats ringing, outside threats ring and so on.
In today\'s industrial landscape, safety and communication are of paramount importance, especially in hazardous environments where explosive materials or gases...