| 摘要 |
<p>A node device in a ring transmission system in which a plurality of node devices are connected as a ring via serial links has a PHY transitioning between a normal mode and a loopback mode with timing that maintains symbol lock between an idle frame transmitted to a later serial link in the normal mode according a transmission instruction, and an idle frame from an earlier node device looped back for output to a later serial link during the loopback mode, thus performing relay processing on non-locally addressed data packets during the loopback mode.</p> |
