Inspecting the PXS

Front Panel

PXS Front Panel View
PXS - Front Panel

There are 4 LEDs in the center of the front panel and 4 LEDs near the bottom edge.

LED Description
100 Mbps When lit, this green LED indicates a 100 Mbps Ethernet connection has been established.
Duplex When lit this green LED indicates a full duplex Ethernet connection has been established.
Link/Active This green LED is on when a valid Ethernet connection has been established. It blinks when data is being transmitted or received.
Status A green LED blinks approximately twice a second to indicate that the on-board software is running. If the on-board software is not running, a orange LED is lit.
TD There are two green Transmit Data (TD) LEDs, one for each channel. When lit, they indicate bits are being transmitted on the corresponding channel.
RD There are two orange Receive Data (RD) LEDs, one for each channel. When lit, they indicate bits are being received on the corresponding channel.

Note: It is common in bit-synchronous operation to transmit "flags" on the line continuously whenever it is idle. In this case, the TD LED will flicker as soon as the corresponding channel is enabled.

Bottom View

Front View
PXS - Bottom View

The bottom of the PXS contains 2 high density DB-26 female connectors. The left connector is synchronous channel 0, the right one is synchronous channel 1. These connectors support RS232 (EIA232), V.35 and EIA530 signaling as defined in Table A.1 and X.21 as defined in Table A.2.

Top View

Rear View
PXS - Top View

The top of the PXS has three connectors:

Note: The PXS does not have a power switch. Unplug the AC power supply to powercycle it.