View single post by slychiu
 Posted: Tuesday Aug 17th, 2021 12:08 pm
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Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 5246

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VOiP lines are not suited for Control by DTMF. This is because the technology is meant for voice which can tolerate delays in the signal frequenmcies. DTMF may not work well on these lines. GSM is still the better alternative

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