Data connections have two components – bandwidth and data allowance.
Example: An ADSL Connection (Asymmetric Digital Subscriber Line) may have connection speeds of 3.2Mbps/.8Mbps. Therefore, the available bandwidth at any one time is 3.2Mb for download, and .8Mb for upload.
Formula: (No. of Mbps * 10) = Possible number of concurrent calls over available download bandwidth.
3.2* 10 = 32
Formula: (No. of Mbps * 10 = Possible number of concurrent calls over available upload bandwidth.
.8 * 10 = 8
Therefore, because the most calls possible on the existing upload capacity is 8, only 8 phones should be used on this data connection. If the 8 phones were in use for 10 hours each, the total amount of data allowance used would be:
8 * 10 * 38MB = 3040MB
To summarise, an ADSL Connection with speeds of 3.2Mbps/.8Mbps will support 8 phones, and use 3040MB of data over 80 hours of talk time with NO Available bandwidth left for anything else.
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