3Com 2126-G User Guide - Page 2

PHYSICAL FEATURES !LLPORTSARE!UTO-$)-$) 8     6^(Z!         0ORT    "ASELINE3WITCH   The numbers in this diagram refer to numbered sections in the text. Front Panel 1 24 RJ-45 10/100 Ports WARNING: RJ-45 ports. These are shielded RJ-45 data sockets. They cannot be used as standard traditional telephone sockets, or to connect the unit to a traditional PBX or public telephone network. Only connect RJ-45 data connectors, network telephony systems, or network telephones to these sockets. Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets. AVERTISSEMENT: Les ports RJ-45. Ceux-ci sont protégés par des prises de données. Ils ne peuvent pas être utilisés comme prises de téléphone conventionnelles standard, ni pour la connection de l'unité à un réseau téléphonique central privé ou public. Raccorder seulement connecteurs de données RJ-45, systèmes de réseaux de téléphonie ou téléphones de réseaux à ces prises. Il est possible de raccorder des câbles protégés ou non protégés avec des jacks protégés ou non protégés à ces prises de don. WARNUNG: RJ-45-Porte. Diese Steckdose sind geschützte Datensteckdosen. Sie dürfen weder wie normale traditionelle Telefonsteckdosen noch für die Verbindung der Einheit mit einem traditionellem privatem oder öffentlichem Telefonnetzwerk gebraucht werden. Nur RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese Steckdosen anschließen. Entweder geschützte oder ungeschützte Buchsen dürfen an diese Datensteckdosen angeschlossen werden. ADVERTENCIA: puertos RJ-45. Son conectores de datos RJ-45 blindados. No pueden utilizarse como tomas de teléfono tradicionales estándar ni para conectar la unidad a una central de conmutación PBX tradicional ni a una red telefónica pública. Conecte sólo conectores de datos RJ-45, sistemas de telefonía de red local o teléfonos de red local a estas tomas. Es posible conectar cables de datos blindados o sin blindar con clavijas blindadas o sin blindar a estos conectores de datos. The Switch has 24 10/100 Mbps auto-negotiating ports. To connect a device to the Switch, use Category 5 unshielded or shielded (screened) 100 Ohm TP cable (or Category 3 cable for a 10 Mbps connection). The maximum length of cable for each connection is 100m (328ft). Connect one end of the cable to an RJ-45 port on the Switch, and the other end to the appropriate RJ-45 port on the connecting device. Each port on the Switch is auto-negotiating: its speed and duplex mode (half duplex or full duplex) are automatically determined by the capabilities of the connected device. Each port supports automatic MDI/MDI-X detection and can be connected to either a 10BASE-T or a 100BASE-TX device. If you connect two Switch units together, the link between them operates at 100 Mbps full duplex. You must use Category 5 cable when connecting the units. CAUTION: The Switch supports full duplex ! auto-negotiation. If the connected device does not support auto-negotiation, the Switch will operate in half duplex mode (even if the device is operating in full duplex mode). In such a configuration, you may notice some degradation of network performance. 3Com recommends that you use devices that are capable of auto-negotiation (and that you ensure that auto-negotiation is enabled, if it is a configurable option). 2 Two 10/100/1000BASE-T Ports Ports 25 and 26 are Gigabit RJ-45 ports. These 1000BASE-T RJ-45 ports support automatic MDI/MDI-X operation, so you can use either straight-through or crossover cables for all network connections to workstations or servers, or to other switches or hubs. Use Category 5e cables for 1000BASE-T operation. 3 Activity/Link/Speed Status LEDs The first (top) and third row of LEDs, which are colored yellow or green, show the activity and speed status of the related ports: Status Meaning On The link has been established. Flashing Packets are being received or transmitted on the port. Off If the link has not been established, either nothing is connected to the port, or there is a problem: ■ Check that the attached device is powered on. ■ Check that the cable is the correct type and is not faulty. If these checks do not identify the cause of the problem, it may be that the unit or the device connected to the port is faulty. Contact your supplier for further advice. 2