ADTRAN L768 - Manual (Page 26)

Chapter 1: Understanding HDSL and the Express L768/L1.5
10 Express L768/L1.5 User Manual 61202192L1-1
Front Panel
Figure 1-5 shows the front panel of the Express L768/L1.5. The indicators are
divided into LAN functions, WAN functions, and Test functions.
Indicators
TX/RX Flashes when transmitting and receiving data on the
10BaseT connector.
LI Link integrity. Illuminates when there is a good
connection between the Express L768/L1.5 and the
Hub/NIC card.
LOOP/LOOP1 Flashes when loop 1 (pins 1 and 2 on RJ-45) is not
in sync. Solid when loop 1 is in sync.
LINK/LOOP2 On Express L768: Illuminates when either PPP or
Frame Relay has an active connection.
On Express L1.5: Flashes when loop 2 (pins 4 and
5 on RJ-45) is not in sync. Solid when loop 2 is in sync.
Figure 1-5
Express L768/L1.5 Front Panels
LI
EXPRESS L1.5
TX/RX LOOP1 LOOP2 PWR
LINE
TEST
LI
EXPRESS L768
TX/RX LOOP LINK PWR
LINE TEST
L768
L1.5