1, all calls must be recorded:
Currently on the domestic market, almost no one wireless device can get to the intercom call, some manufacturers claim that you can get wireless actual principle is at the recording device which adds a walkie-talkie receiver module, in other words, that is, which has a a walkie-talkie. This approach has several problems: the frequency range of the collection, from the acquisition, and costs. Because the built-in receiver module can only cover a certain frequency range, and a lot of different applications have different frequency ranges industry, such as civil, military, public security, railways, Maritime Bureau, which has an independent frequency range, if only built a receiver module, its scope will be very small; second problem is the collection distance, walkie-talkie power is relatively small distances much smaller than radio transceiver, if the built-in radio, antenna module can not be replaced, it would be unable to record the radio; the third problem is the cost for professional radio, the price is very expensive, with a built-in receiver module is certainly more expensive than external. Swift VLD series recording equipment, walkie-talkies are using an external way to the recording of the walkie-talkie brands and models, without any requirements for recording are still routine use walkie-talkie, walkie-talkie can be replaced at any time, you can use the existing walkie-talkie, civilian dedicated arbitrary replacement.
2, the omission will not occur when recording:
When you select a sound recording device, not just consider price, cheap recording equipment itself, in addition to a single function and performance than the reaction rate of the voice often low, because they are based on low speed in order to save cost microcontroller. So there will be a large number of cases of missing words, good words to say a word in front of the late forensic inquiries brought a lot of trouble. Swift's VLD series intercom voice recording equipment in response rate similar products second to none, only millisecond delay than the delay of a few seconds while moving much faster.
3, the ability to obtain ID:
ID Normally there are two, one is launching DTMF code, there is a digital encoding. For the first, we VLD series intercom recording equipment, it is acquired. For a second, unfortunately, not only we VLD series of recording equipment can not be obtained, other third-party products like no one can get to, because it is digital, is used only to identify the intercom own code, third-party audio equipment, it can not be decoded
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