We have a customer who has subscribed to 1M of EF ( Expedite forwarding) class bandwidth ( in a 2M link)for transporting voice, AF1 class 392K for Voice signalling. The codec used is G.729b.The problem faced by the customer is they are not able to fully utilise the 1M bandwidth allocated for voice. The number of voice calls doesn't exceed 30 although there is enough bandwidth for about 35+ calls.There are also no drops seen in EF class.
Any idea whats causing this? Any specific debug which can be captured on the router when call volume peaks?