HEWLETT PACKARD COMPANY
HP 28685B
Card Type | Ethernet transceiver |
Network Transfer Rate | 10Mbps |
Topology | Star |
Wire Type | Unshielded twisted pair |
Data Bus | AUI via DB-15 connector |

CONNECTIONS | |||
Function | Label | Function | Label |
UTP connector | CN1 | AUI via DB-15 connector | CN2 |
USER CONFIGURABLE SETTINGS | |||
Setting | Label | Position | |
| » | Transceiver configured for maximum UTP cable length of 100 meters | SW1/1 | Off |
Transceiver configured for maximum UTP cable length of 150 meters over Cat 3 cable or 225 meters over Cat 4 cable | SW1/1 | On | |
| » | Loopback test mode disabled | SW1/2 | Off |
Loopback test mode enabled | SW1/2 | On | |
| » | Heartbeat signal enabled | SW1/3 | On |
Heartbeat signal disabled | SW1/3 | Off | |
| » | SQE signal enabled | SW1/4 | On |
SQE signal disabled | SW1/4 | Off | |
Note:When the transceiver is configured for long cable lengths, it must be connected to another HP transceiver or hub which supports and is configured for this option. | |||
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
PWR | Green | On | Power is on |
PWR | Green | Off | Power is off |
LINK | Green | On | Network connection is good |
LINK | Green | Off | Network connection is broken |
TX | Green | On | Transceiver is transmitting large amounts of data |
TX | Green | Off | Transceiver is not transmitting data |
TX | Green | Blinking | Transceiver is transmitting data |
RX | Green | On | Transceiver is receiving large amounts of data |
RX | Green | Off | Transceiver is not receiving data |
RX | Green | Blinking | Transceiver is receiving data |
POL | Green | On | Line polarity is normal |
POL | Green | Off | Line polarity is reversed |
COL | Yellow | On | UTP cable is faulty |
COL | Yellow | Off | Network collision not detected |
COL | Yellow | Blinking | Network collision detected |