1. A base station controller, comprising: a call control resource manager, said call control resource manager controlling exchanges of messages between at least one mobile terminal and a mobile switching center (“MSC”); a first coding resource associated with said call control resource manager, said first coding resource performing digital-to-analog (“D/A”) and analog-to-digital (“A/D”) conversions for a first message type; and a second coding resource associated with said call control resource manager, said second coding resource performing D/A and A/D conversions for a second message type.