User's Manual 164 Document #: LTRT-10632
Mediant 800B Gateway & E-SBC
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' on page 436).
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' on
page 774. 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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