1. A system for automatic communication event routing and transfer capability in a multi-site communication-center environment comprising: a first processor in a first communication-center site, the first processor being configured to send a routing request to a second processor in a second communication-center site for transferring a communication event to the second communication-center site, wherein the routing request adheres to a proprietary protocol other than a standards-based protocol; a processing device coupled to the first and second processors, the processing device being configured to: receive a first message from the first processor, wherein the first message adheres to the standards-based protocol; and send a second message to the second processor for determining presence state of a target resource in the second communication-center site prior to transfer of the event, wherein the second message adheres to the standards-based protocol; and a switch coupled to the first processor for transferring the communication event to the second communication-center site, wherein the routing request and the first message are each transmitted by the first processor in response to receipt of the communication event at the first communication-center site, wherein the second processor at the second communication-center site is configured to transmit a response to the first processor indicative of whether the transfer of the communication event is to be completed, wherein the response is based on processing the routing request and the second message by the second processor.