Bay Technical Associates none Manual De Usuario
Operating the ARN
114200 Rev. A
3-7
ISDN BRI LEDs (S/T or U Interfaces)
DSU/CSU LEDs
Table 3-8.
ISDN BRI LEDs
LED
Meaning
S/T Interface
Unlabeled LED
Lights when the ARN is using the D-channel.
U Interface
D
(D-channel; 16-KB
Management Channel)
(D-channel; 16-KB
Management Channel)
Lights when the ARN is using the D-channel.
DD
(Data Detect)
(Data Detect)
Lights when the interface detects connection to an external
device (that is, a switch).
device (that is, a switch).
B1
(B-Channel #1; 64-KB
Data Channel)
(B-Channel #1; 64-KB
Data Channel)
Lights when the ARN is using B-channel #1.
B2
(B-Channel #2; 64-KB
Data Channel)
(B-Channel #2; 64-KB
Data Channel)
Lights when the ARN is using B-channel #2.
Table 3-9.
DSU/CSU LEDs
LED
Meaning
TxD
(Transmit Data)
(Transmit Data)
Lights when the interface transmits data over the network.
RxD
(Receive Data)
(Receive Data)
Lights when the interface receives data from the network.
CD
(Carrier Detect)
(Carrier Detect)
Lights when the interface detects a connection to another
device.
device.
Test
Lights when the interface is in test or loopback mode.