Juniper Networks M20 Manuel d'utilisateur télécharger pdf (Page 47)

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Autosensing full-duplex and half-duplex modes

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Virtual Router Redundancy Protocol (VRRP)

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802.1Q virtual LANs (VLANs)

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Circuit cross-connect (CCC) VLAN

Software features

4-port PIC:

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Connector: Two-pair, Category 5 unshielded twisted-pair connectivity through an RJ-45

connector

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Pinout: MDI noncrossover

8-port PIC:

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Connector: MT-RJ female

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FX optical interface—See Table 11 on page 48

12-port PIC:

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Connector: One very High Density Connector Interface (VHDCI) to RJ-21 cable that

connects to an RJ-45 patch panel

Cables and connectors

Status LED, one bicolor:

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Off—PIC ports not enabled

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Green—PIC is operating normally

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Red—PIC has an error or failure

4-port PIC—One pair of port LEDs:

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Link LED—If green, the port is online; if there is no light, the port is down

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RX LED—If flashing green, the port is receiving data; if there is no light, the port might

be on, but is not receiving data

8-port PIC—one pair of port LEDs per port:

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Port link LED—If green, the port is online; if there is no light, the port is down

NOTE: The Link LED remains lit on the 8-port PIC when the port is down.

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Port RX LED—If flashing green, the port is receiving data; if there is no light, the port

might be on, but is not receiving data

12-port PIC—one port LED per port:

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Green—100-Mbps link established

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Flashing green—100-Mbps activity

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Yellow—10-Mbps link established

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Flashing yellow—10-Mbps activity

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Off—No link present

NOTE: The port LEDs remains lit on the 12-port PIC when the ports are down.

LEDs

Fast Ethernet PICs ■ 47

Fast Ethernet PICs

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Juniper Networks M20 Manuel d'utilisateur Page 47

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