The amount of data used with a Hosted Voice PBX System will vary depending on the quality settings used. On most hosted PBX system you adjust the amount of data used for voice calls by varying the codec used to carry your calls.
If you use G729 then expect to use around 13mb/hour of talk time, for G711a allow 30-40mb/hour. Our statistics show that the average talk time per line per day is between 30 min to 1 hour so if you have 5 lines, allow between 650mb and 1.3gb per month using G729 and between 1.8gb to 3.5gb per month if using G711. Note we assume a 20 day working month and usage is based upon general office conditions.
If your operating hours or days of operation vary from the example provided just modify talk time on a pro rata basis to suit your business and recalculate.
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