Isdn Bri Leds (S/T Or U Interfaces); Dsu/Csu Leds - Bay Networks BayStack ARN Routers none Installation And Operating Manual

ISDN BRI LEDs (S/T or U Interfaces)

Table 3-8
Table 3-8.
LED
S/T Interface
Unlabeled LED
U Interface
D
(D-channel; 16-KB
Management Channel)
DD
(Data Detect)
B1
(B-Channel #1; 64-KB
Data Channel)
B2
(B-Channel #2; 64-KB
Data Channel)

DSU/CSU LEDs

Table 3-9
Table 3-9.
LED
TxD
(Transmit Data)
RxD
(Receive Data)
CD
(Carrier Detect)
Test
114200 Rev. A
describes the ISDN adapter module LEDs.
ISDN BRI LEDs
Meaning
Lights when the ARN is using the D-channel.
Lights when the ARN is using the D-channel.
Lights when the interface detects connection to an external
device (that is, a switch).
Lights when the ARN is using B-channel #1.
Lights when the ARN is using B-channel #2.
describes the DSU/CSU adapter module LEDs.
DSU/CSU LEDs
Meaning
Lights when the interface transmits data over the network.
Lights when the interface receives data from the network.
Lights when the interface detects a connection to another
device.
Lights when the interface is in test or loopback mode.
Operating the ARN
3-7