Detailed instructions for use are in the User's Guide.
[. . . ] ACER does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein. Certificate of the Manufacturer/Importer
It is hereby certified that the GS108T Gigabit Smart Switch has been suppressed in accordance with the conditions set out in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example, test transmitters) in accordance with the regulations may, however, be subject to certain restrictions. The Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market and has been granted the right to test the series for compliance with the regulations. [. . . ] Multicast
You can configure IGMP snooping, static multicasting, and multicast group membership. IGMP Snooping
IGMP specifies how a host can register to a router to receive specific multicast traffic. Configure the switch to use IGMP snooping in subnets that receive IGMP queries from either IGMP or the IGMP snooping querier. IGMP snooping constrains multicast traffic at Layer 2 by configuring Layer 2 LAN ports dynamically to forward multicast traffic only to those ports that want to receive it. IGMP is a standard defined in RFC1112 for IGMPv1 and in RFC2236 for IGMPv2. When you enable IGMP snooping, the screen expands to display fields in which you can specify how IGMP leave packets are processed. When you enable IGMP snooping, the screen expands to display fields in which you can specify how IGMP leave packets are processed. Select a radio button to specify how IGMP leave packets are processed: • Disable. Specifies that an incoming IGMP leave packet is forwarded to the multicast router, that is, the incoming IGMP leave packet is not blocked. Specifies that an incoming IGMP leave packet is filtered (also referred to as blocked) and, therefore, not forwarded to the multicast router. Static Multicasting
Static multicast addressing provides a way to add or delete static multicast addresses that are related to a VLAN. The QoS setting lets you map each of the eight priority levels to one of four internal hardware priority queues: High, Normal, Low, and Lowest. The six most significant bits of the DiffServ field are called the Differentiated Services Code Point (DSCP) bits. You can map the DSCP value to one of the eight priority levels (p0 to P7) of IEEE 802. The switch empties the four hardware priority queues in order, beginning with the highest priority queue to the lowest priority queue. Each hardware queue transmits all of the packets in its buffer before permitting the next lower priority to transmit its packets. Basic—Rate Limit
The Rate Limit screen, which is also referred to as the Rate Control Setting screen, lets you control the bandwidth of ingress (incoming) and egress (outgoing) traffic for a specific port. You can make changes to the bandwidth limits for an individual port, for a group of ports, or for all ports simultaneously: • To change the bandwidth limits for an individual port, select the check box to the left of its port number, and then select bandwidth limits. Note: You can also enter the interface number (that is, the port number) in the GO TO INTERFACE field, and then click GO. • To change the bandwidth limits for a group of ports, select the check boxes to the left of their port numbers, and then select the bandwidth limits. To change the bandwidth limits for all ports simultaneously, select the check box at the top of the column of check boxes, and then select the bandwidth limits. The possible values in bits per second (bps) are: – 512K bps, 2M bps, 4M bbps, 10M bps, 20M bps, 40M bps, 60M bps, 100M bps, 200M bps, 400M bps, and 1000M bps. [. . . ] The nature of 1000BASE-T renders this measurement very important; if too much energy is reflected back onto the receiver, the device does not perform optimally. Unlike 10BASE-T and 100BASE-TX, which use only two of the four pairs of wires within the Category 5 cable, 1000BASE-T uses all four pairs of the twisted pair. This Factors that affect the return loss are: • • • • The number of transition points, as there is a connection through an RJ-45 to another connector, a patch panel, or device at each transition point. ACER strongly recommends that, when RJ-45 connections are made, this is minimized to 1 1/4 inch (32 mm). [. . . ]