Detection method of analog trunk line
A technology of analog trunking and line detection, applied in monitoring/monitoring/testing arrangements, interconnection devices, electrical components, etc., can solve problems such as call flow impact, incorrect call connection, and lengthening call setup time, to improve success. rate, avoid the effect of misconnection
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[0017] The technical solutions of the present invention will be described in detail below in conjunction with the drawings and specific implementations.
[0018] The invention uses hardware or software to off-hook the analog relay interface, and then hangs up after a short period of time. In this short period of time, the PBX does not respond to the user's off-hook, thereby completing the state detection of the analog trunk, and judging whether it is necessary to select another analog trunk for detection based on the detection result.
[0019] In the present invention, the environment where the analog relay interface is used is figure 1 , Before the analog trunk interface actively calls (or passively answers), implement a short-term off-hook and then on-hook in order to select an available interface. When the analog trunk interface is in the off-hook state, the analog trunk line forms a loop with the interface circuit of the opposite PBX. During the off-hook state, it detects whe...
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