[Freeswitch-users] is it possible to use mod_callcenter queues without answering the line

Hi, is it possible to use mod_callcenter queues without answering the line, that is the customer is held in the queue and hearing ringing (without the call being answered). In fact this is a mandatory requirement when calls have a cost and we don't want to charge customer for waiting time but only for talk time. Thanks in advance. Khalil