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Micro House PC Hardware Library Volume II: Network Interface Cards And Modems 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

COL On A data collision is detected on the network
COL Off No data collision detected on the network
POL On Polarity is normal
POL Off Polarity is reversed (twisted pair receive or transmit wires are reversed)
JAB On Network jabber is detected (Continuous defective transmissions due to faulty wiring or node connections)
JAB Off Network jabber is not detected

Table 3.3: Diagnostic LED Description - Token Ring

NET On Adapter successfully joined the ring - network connection is good
NET Off Adapter did not successfully join the ring - network connection is not available
16/4 On 16 Mbps transmission speed is enabled
16/4 Off 4 Mbps transmission speed is not enabled

Table 3.4: Diagnostic LED Description - ARCNET

NET On Network configuration is good
NET On Card is reconfiguring to the network
NET Off Network configuration is bad

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)
Maximum Onboard Memory 128KB SRAM
Boot ROM Not available
Network Transfer Rate 155Mbps
Topology Star
Wire Type Fiber optic cable
Data Bus 32-bit PCI
Card Size Full height, half length

CONNECTIONS
Function Label
Fiber optic SC cable connector CN1

DIAGNOSTIC LED(S)
LED Color Status Condition
LINK Unidentified On Network connection is good
LINK Unidentified Blinking Card is in test mode or driver is being loaded
LINK Unidentified Off Network connection is broken, card is on standby mode, or driver not loaded

ETHERLINK 16 TP (3C507-TP)

NIC Type Ethernet
Transfer Rate 10Mbps
Data Bus 16-bit ISA
Topology Star
Wiring Type Unshielded twisted pair
Boot ROM Available

10BASE-T STANDARD COMPATIBILITY CONFIGURATION
Setting Jumper Setting
DC signal disabled2 J1 Pins 2 & 3 closed
     DC signal enabled (On receive wires)3 J1 Pins 1 & 2 closed
Link beat enabledJ2 Pins 1 & 2 closed
     Link beat disabled J2 Pins 2 & 3 closed
Receive threshold select normalJ3 Pins 1 & 2 closed
     Receive threshold select low1 J3 Pins 2 & 3 closed
Equalization disabled2 J4 Pins 2 & 3 closed
     Equalization enabled3 J4 Pins 1 & 2 closed
Transmit level select normal (±5V)J6 Pins 1 & 2 closed
     Transmit level select low (±2V) J6 Pins 2 & 3 closed
Cable Impedance select 100ohmsJ7 Pins 2 & 3 closed
     Cable Impedance select 150ohms J7 Pins 3 & 4 closed
     Cable Impedance select 75ohms J7 Pins 1 & 2 closed
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.

DIAGNOSTIC LED(S)
LED Color Status Condition
L1 Yellow Blinking Data is being transmitted or received
L1 Yellow Off Data is not being transmitted or received
L2 Green On Twisted pair network connection is good
L2 Green Blinking Twisted pair wire polarity reversed
L2 Green Off Twisted pair network connection is broken
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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