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| Service d'annonce de conférence (The service that implements in-conference services for multiple PSTN users at the same time. For example, it can be used to play an entry or exit tone to multiple PSTN users at the same time) | |||
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| Service d'annonce de conférence (The service that implements in-conference services for multiple PSTN users at the same time. For example, it can be used to play an entry or exit tone to multiple PSTN users at the same time) | |||