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| Word |
Explanation |
| B2BUA (Back-to-Back User Agent) |
Handles SIP call signaling from its initiation to completion. Based on SIP, B2BUA functions as a SIP User Agent Client (UAC) when initiating a call. On the other hand, it also functions as a SIP User Agent Server (UAS) to receive incoming messages.B2BUA participates in call transfer, call disconnection, maintaining network transparency and billing. Providers use B2BUA to offer multi-feature services to subscribers.
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