AudioCodes Mediant 800 - Page 154

CHAPTER13 Network
Mediant 800 Gateway & E-SBC | User's Manual
The device's support for ICE-Lite means that it does not initiate the ICE process. Instead, it
supports remote endpoints that initiate ICE to discover their workable public IP address with the
device. Therefore, the device supports the receipt of STUN binding requests for connectivity
checks of ICE candidates and responds to them with STUN responses. Note that in the response
to the INVITE message received from the remote endpoint, the device sends only a single
candidate for its' own IP address. This is the IP address of the device that the client uses. To
support ICE, the SBC leg interfacing with the ICE-enabled client (SIP entity) must be enabled for
ICE. This is done using the IP Profile parameter, IPProfile_SBCIceMode (see Configuring IP
Profiles).
As the ICE technique has been defined by the WebRTC standard as mandatory for communication
with the WebRTC client, ICE support by the device is important for deployments implementing
WebRTC. For more information on WebRTC, see WebRTC . Once a WebRTC session
(WebSocket) is established for SIP signaling between the device and the WebRTC client, the
client's IP address needs to be discovered by the SBC device using the ICE technique.
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