Planet Technology GSD-804 - Manual (Page 9)

This product also supports store-and-forward forwarding scheme to
ensure low latency and high data integrity, eliminates unnecessary
traffic and relieves congestion on critical network paths. With an
intelligent address recognition algorithm, the switches could recognize
up to 4K different MAC address and enables filtering and forwarding at
full wire speed.
2.1.2 Switch Front Panel
Figure 2-1 & 2-2 show the front panel and rear panel of GSD-503
Figure 2-1 GSD-503 front panel
Figure 2-2 GSD-503 rear panel
Figure 2-3 & 2-4 show the front panel and rear panel of GSD-504
Figure 2-3 GSD-503 front panel
Figure 2-4 GSD-504 rear panel