using TListenDisconnect and TListenReconnect

[Vivek]

when we receive a call from a customer, we call 3 rd party carrier to get some information. I want to provide the ability
to "toggle" back and forth between the customer and a 3rd party carrier when we make conference call.

I know that I can use TListenDisconnect and TListenReconnect for this. But I am having a problem to get listenerDN. Any idea how to get listenerDN. We are using lucent switch.

Thanks