– Integrated Managed Layer 2 Switch

– 24… 60 VDC supply voltage

– 4x 10/100 BaseT (RJ45. auto-negotiation)

– 1x SHDSL port for copper lines

– Redundant topology via Spanning Tree Protocol (STP/RSTP/MSTP)

– 1x RS-232/ RS-485 interface for tunneling of serial protocols

entry will age out in up to 304 seconds (by default, this value is configurable).Applications

The DIN-rail mountable 500NMD01 is a dcs-sis.com managed plug-and-play Layer 2 switch that offers

– 4 Fast Ethernet auto-negotiating RJ45 ports with automatic MDI/X (automatic cross detection and correction)

– 1 2-wire SHDSL port for dedicated copper cable

– 1 RS-232/ RS-485 interface for tunneling of serial protocols

The switch provides a redundant topology via Spanning Tree Protocol (STP/ RSTP/ MSTP). It supports VLAN framing and serial data tunnelling.

Ethernet can be distributed within the station via the switch’s four RJ45 ports.

The SHDSL port can be used for interstation interconnections up to a maximum distance of 25 km (0.8 mm diameter copper cable).

The SHDSL interface connects to any EDS500 SHDSL-compatible device, including the 560NMS24 and 560NMS34. as well as any EFM-based SHDSL device.

Features

For documentation purposes, the Ethernet ports are labelled 1 to 4 and there are no specific uplink ports.

All ports are functionally identical, and the SHDSL port is connected via a pluggable threaded connector.

The link and speed status of each Ethernet port and SHDSL port is indicated by status indicators (see ‘Connectors and Indicators’).

The switch learns the Ethernet address by analysing incoming frames and stores it in a lookup table (up to 2048 entries).

used to forward frames only to the correct port. If it is a broadcast or multicast, or if the destination address is not found in the lookup table, the

then the received frame is forwarded to all ports other than the receiving port. If an incoming frame with a specific source address does not refresh the entry in the lookup table, the

entry will age out in up to 304 seconds (by default, this value is configurable).