Flow control of ABR service is identified by ATM forum as a rate-based close-looped feedback mechanism, which makes ABR service the only one whose rate can be controlled among the five services.

对于A BR业务，AT M论坛最终确定其流量及拥塞控制是一种基于速率的闭环反馈控制机制，这使得A BR成为五种业务中唯一一种速率可控的业务。

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