| 摘要 |
A device receives a request, from a first endpoint device, to initiate a communication session with a second endpoint device. The device determines whether an IP version that is likely to be used by the second endpoint device, in establishing a media communication session, is compatible with the IP version used by the first endpoint device. The device transmits, when the determination is that the IP version likely to be used by the second endpoint device is compatible with the IP version used by first endpoint device, SIP messages to signal the establishment of a direct media communication session between the first and second endpoint devices. Otherwise, the device may transmit SIP messages to signal the establishment of the media communication session through an intermediary device.
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