T
ROUBLESHOOTING
The front panel of the CyberSWITCH has several LED indicators. Refer to
page 20
for an illustration
of the front panel. The Power indicator will remain lit while the unit is on. There is a series of three
LAN indicators
: they light up indicating transmissions, receptions, or good link integrity on the
10Base-T port. The
WAN indicators
include the Sync, D-Chan, CH-1, and CH-2. Detailed
descriptions of the indicators follow.
L
OCAL
A
REA
N
ETWORK
LED I
NDICATORS
There are three LAN indicators: TX, RX, and 10BaseT. These three indicators provide information
about the state of the communication link between the CyberSWITCH and the LAN to which it is
connected.
1.
The 10BaseT indicator signifies connection to a 10Base-T LAN. If there is good link integrity on
the 10Base-T port, this light shines steadily. If a connection other than 10Base-T is used (such
as an AUI connection) or there is no link integrity, this light will not shine.
2.
The TX indicator signifies that the CyberSWITCH has transmitted data to the LAN. TX flashes
whenever the CyberSWITCH sends at least 128 bytes of data on the LAN.
3.
The RX indicator signifies that the CyberSWITCH is receiving data from another device on the
LAN to which it’s connected.
W
IDE
A
REA
N
ETWORK
LED I
NDICATORS
The bank of four LED indicators make up the Wide Area Network (WAN) LED indicators. The
WAN LED indicators provide information on the status of the BRI line. The four LED indicators
include: Sync, D-Chan, CH-1, and CH-2.
•
The Sync indicator identifies whether or not the most basic level of the ISDN connection (Layer
1) is established. It verifies that the CyberSWITCH is connected to the ISDN network at this BRI
port. This light must be on for D-CHAN, CH-1 or CH-2 to be operational.
•
The D-Chan indicator signifies data link and D-channel activity. If the D channel is active, the
indicator flashes. When a call goes up, the D-Chan indicator flickers momentarily, and then
turn on as the CH-2 indicator turns on. With a second call, the D-Chan indicator flickers mo-
mentarily and then the CH-1 indicator turns on.
