preAllocateResPad

This indicates whether or not a resource pad is pre-allocated during an incoming fast start call procedure that results in G.711 codec selected for the call. If subsequent TCS exchange deems resource pad not necessary, it will be released. It is advisable to turn on this setting to support DTMF digit collection, such as for 2-stage dialing, when the selected codec for the call is G.711. If enabled and no resource is available, the call will fail.