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Micro House PC Hardware Library Volume II: Network Interface Cards And Modems
by Micro House International, Inc. and Scott Mueller
Que, Macmillan Computer Publishing
ISBN: 078971664x Pub Date: 06/17/98
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Table 3.2: Diagnostic LED Description - Ethernet
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COL
| On
| A data collision is detected on the network
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COL
| Off
| No data collision detected on the network
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POL
| On
| Polarity is normal
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POL
| Off
| Polarity is reversed (twisted pair receive or transmit wires are reversed)
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JAB
| On
| Network jabber is detected (Continuous defective transmissions due to faulty wiring or node connections)
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JAB
| Off
| Network jabber is not detected
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Table 3.3: Diagnostic LED Description - Token Ring
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NET
| On
| Adapter successfully joined the ring - network connection is good
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NET
| Off
| Adapter did not successfully join the ring - network connection is not available
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16/4
| On
| 16 Mbps transmission speed is enabled
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16/4
| Off
| 4 Mbps transmission speed is not enabled
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Table 3.4: Diagnostic LED Description - ARCNET
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NET
| On
| Network configuration is good
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NET
| On
| Card is reconfiguring to the network
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NET
| Off
| Network configuration is bad
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Jumper Settings
The remainder of this chapter contains set-up information on selected network interface devices.
3COM CORPORATION
ATMLINK (3C975-F)
NIC Type
| ATM (OC-3c)
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Maximum Onboard Memory
| 128KB SRAM
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Boot ROM
| Not available
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Network Transfer Rate
| 155Mbps
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Topology
| Star
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Wire Type
| Fiber optic cable
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Data Bus
| 32-bit PCI
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Card Size
| Full height, half length
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CONNECTIONS
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Function
| Label
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Fiber optic SC cable connector
| CN1
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DIAGNOSTIC LED(S)
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LED
| Color
| Status
| Condition
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LINK
| Unidentified
| On
| Network connection is good
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LINK
| Unidentified
| Blinking
| Card is in test mode or driver is being loaded
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LINK
| Unidentified
| Off
| Network connection is broken, card is on standby mode, or driver not loaded
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ETHERLINK 16 TP (3C507-TP)
NIC Type
| Ethernet
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Transfer Rate
| 10Mbps
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Data Bus
| 16-bit ISA
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Topology
| Star
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Wiring Type
| Unshielded twisted pair
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Boot ROM
| Available
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10BASE-T STANDARD COMPATIBILITY CONFIGURATION
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Setting
| Jumper
| Setting
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DC signal disabled2
| J1
| Pins 2 & 3 closed
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DC signal enabled (On receive wires)3
| J1
| Pins 1 & 2 closed
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Link beat enabled | J2
| Pins 1 & 2 closed
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Link beat disabled
| J2
| Pins 2 & 3 closed
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Receive threshold select normal | J3
| Pins 1 & 2 closed
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Receive threshold select low1
| J3
| Pins 2 & 3 closed
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Equalization disabled2
| J4
| Pins 2 & 3 closed
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Equalization enabled3
| J4
| Pins 1 & 2 closed
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Transmit level select normal (±5V) | J6
| Pins 1 & 2 closed
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Transmit level select low (±2V)
| J6
| Pins 2 & 3 closed
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Cable Impedance select 100ohms | J7
| Pins 2 & 3 closed
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Cable Impedance select 150ohms
| J7
| Pins 3 & 4 closed
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Cable Impedance select 75ohms
| J7
| Pins 1 & 2 closed
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Note 1 Use thist setting with the 3Com MultiConnect TP Module. Do not use this setting with the 3Com LinkBuilder, or the SynOptics LattisNet Model 3308. Note 2 This is the 10BASE-T standard and should be used with all 10BASE-T standard hubs. Note 3 This setting is required when using any Pre-10BASE-T SynOptics hub.
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DIAGNOSTIC LED(S)
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LED
| Color
| Status
| Condition
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L1
| Yellow
| Blinking
| Data is being transmitted or received
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L1
| Yellow
| Off
| Data is not being transmitted or received
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L2
| Green
| On
| Twisted pair network connection is good
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L2
| Green
| Blinking
| Twisted pair wire polarity reversed
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L2
| Green
| Off
| Twisted pair network connection is broken
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Note: Reversed polarity is automatically corrected for but this may impede performance. It is suggested that reversed polarity wires be corrected to attain maximum performance.
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