| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a private branch exchange which can suppress the fluctuation of synchronous packets transmitted from a clock master to clock slaves. SOLUTION: An LU (clock master) 103-1 transmits synchronous packets from its LAN interface 105-1 and interface 106-1 exclusively used for synchronous packet. LUs 103-2 and 103-3 which are clock slaves requiring high-accuracy synchronization receive the synchronous packets transmitted from the interface 106-1 from their interfaces 106-2 and 106-3 exclusively used for synchronous packet through a hub 104. Since paths exclusively used for synchronous packet are provided separately from an L2SW 102 path, the fluctuation of the synchronous packets can be suppressed.</p> |
