3com 3c523 EtherLink MC TP

ETHERLINK/MC TP (3C523-TP) Jumpers



1C, 5D Mot 10116
1D Mot 10115
2B, 14A Mot MC3346D
5A EtherStart/MC PROM
6C MAC address
6E DP8391AV
7A,C CXK5864BM-10L
7D N82586
9C, 11C 3com 6408-01
13A MAXIM MAX700
13D Mot MPQ2369
J1-4 Line Impedance
J5 RJ45 port
J6 AUI port
 J5 Equalization
J6 Receive Threshold
J7 SQE Heartbeat "LK BT"
J8 Transmit Level
J9 DC Signal
MODE pads for two pin header
TEST pads for two pin header
TX1 FIL-MAG 66Z1250A [RJ45]
TX2 FIL-MAG 23Z114SM [RJ45]
TX3 FIL-MAG 23Z81SM [RJ45]
TX4 Valor PT3800 [AUI]
Y1 20.0000 MHz
Y2 16.0000 MHz
0
NOTE: J5 and J6 are both for jumpers for  -AND- the RJ45 port and AUI port.
NOTE: TEST and MODE do unknown things.

MAX700 Power-Supply Monitor with Reset 
Motorola MPQ2369 Quad Dual-In-Line Switching Transistor NPN Silicon
DP8391AV  Serial Network Interface [SNI]
Motorola MC3346D Transistor Array One differential pair, three isolated  arrays
Motorola 10115 Quad differential amplifier
Motorola 10116 Triple differential amplifier
N82586  IEEE 802.3 Ethernet LAN Coprocessor, 8MHz
FIL-MAG 23Z114SM  Isolation Transformer For 10BASE-T
FIL-MAG 23Z81SM  Data Line Filter
Valor PT3800  huh?

 Line Impedance Jumpers [J1-J4]  
  NOTE: These are four pin jumpers. For each value of Impedance, the Jumpers use the same pin-pairs on each jumper.

Impedance
 Jumpers J1-J4
75 ohms
 1-2
100 ohms
 2-3
150 ohms
 3-4

User Configurable Settings 

Jumper
 Function
 Pin Pair
J5 Equalization
 Transmit [10b-T] 1-2

Receive [non 10b-T] 2-3
J6 Receive Threshold
 Normal [10b-T] 1-2

Low [non 10b-T] 2-3
J7 SQE Heartbeat
 Enable [10b-T] 1-2

Disable [non 10b-T] 2-3
J8 Transmit Level
 Normal [10b-T]
 1-2

Attenuated [non 10b-T]
 2-3
J9 DC Signal
 Enabled [10b-T]
 1-2

Disabled [non 10b-T]
 2-3
NOTE: If you have a 10b-T hub, use 1-2 on all jumpers.

Jumper Settings for 10BASE-T and Non-10BASE-T Hubs  
Jumper 10base-T
 SynOptics
LattisNet
(non 10b-T)
 ATT/HP StarLan 10
David Systems
(non 10b-T)		 BULL Hub 10
(non 10b-T)
J5 Equalization TX RX TX RX
J6 RCV Thresh NORM LOW NORM LOW
J7 Link Beat ON OFF OFF OFF
J8 XMIT Level NORM LOW NORM LOW
J9 DC Signal OFF ON OFF OFF