(Answered) Abc inc is planning to lease a 512 kbps frame relay

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ABC Inc. is planning to lease a 512 Kbps frame relay connection between two PBXs from two branch locations. On the connection, 120 call attempts with an average call duration of 10 minutes during the busy hour were observed. What's the traffic volume/load in erlangs on this trunk connection?

The audio codec used on the trunk is G.729A with a 20-millisecond packet duration. What's the call-blocking probability, as a percentage, achieved on this trunk? Is such a calling-blocking probability acceptable, given the 1-5% norm in the industry?

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