Minimum bandwidth for voip phone

I have purchased a voip service recently. Unfortunately, it did not work at all. When I asked my provider, he said, i needed more bandwidth for voip service. Let me know what is the minimum bandwidth required for a voip phone service.

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Minimum bandwidth depends on what codecs and protocols you are using. Generally, recommended speed is at least 1M download and 512k upload.

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It is a minimum speed for VoIP transmission only. You need more bandwidth if you want to do browsing on the same internet line.