_ExcerptWebRTCBackup
If VCC loses connection with Vonage's WebRTC and if enabled for your account, Vonage will automatically connect VCC to a backup WebRTC provider to restore service. As long as the backup provider is not blocked by your firewall, the switch from Vonage's WebRTC to the other provider will occur seamlessly. For information about configuring your firewall to allow WebRTC traffic, see Firewall configuration in Technical prerequisites.
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