Hitachi Energy 560NMD01 Managed Layer 2 Switch
Applications
The 560NMD01 Top Hat DIN-Rail Appliance is a managed Layer 2 switch.
It provides four Fast Ethernet RJ45 ports with automatic MDI/X (Automatic Cross Detection and Correction) and a 2-wire SDSL interface.
The SDSL interface can be used to connect sites with distances of up to 20 km (copper cable, 0.8 mm diameter).
Thanks to the (fast) Spanning Tree Protocol, the switch enables a redundant topology.
For documentation purposes, Ethernet ports are labelled with numbers 1-4. There are no special uplink ports. All ports are functionally identical.
The SDSL ports are externally www.cniacs.com connected via backplane or expansion connectors. The connection (link) and speed status of all Ethernet and SDSL ports is indicated by LEDs on the front panel.
The switch “learns” Ethernet addresses by analysing received frames.
The addresses learned in this way are stored in the address table (up to 2048 entries) and are used to forward the frames to the correct interface.
Frames are forwarded to all interfaces only if they are received with a wide or multicast address, or if the destination address is not found in the address table.
If an entry in the address table is not acknowledged by the corresponding received frame, it is deleted after a maximum of 304 seconds (default).
IEEE 802.1Q-compliant VLAN configuration is supported. Frames can be transparently forwarded or assigned to (access or trunk) VLANs.
The switch can support quality of service if IEEE 802.1p-compliant frame formats are used. The switch can divide outbound frames into up to four priority-controlled queues.
The device has a wide-range power supply, requiring a voltage between 24 and 60 V. The switch can be used with a wide range of power supplies.
The Ethernet interface, SDSL, RS232 (Con 0) and the expansion bus interface (Ext) can be plugged in during operation (hot-swap).