Isdn Bri Leds (S/T Or U Interfaces); 56/64K Dsu/Csu Leds - Nortel 114200-E Installation And Operating

ISDN BRI LEDs (S/T or U Interfaces)

Table 3-10
Table 3-10.
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)

56/64K DSU/CSU LEDs

Table 3-11
Table 3-11.
LED
TxD
(Transmit Data)
RxD
(Receive Data)
CD
(Carrier Detect)
Test
114200-E Rev 00
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 ISDN-BRI 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 56/64K DSU/CSU adapter module LEDs.
56/64K DSU/CSU LEDs
Meaning
Lights when the 56/64K DSU/CSU interface transmits data
over the network.
Lights when the 56/64K DSU/CSU interface receives data
from the network.
Lights when the 56/64K DSU/CSU interface detects a
connection to another device.
Lights when the 56/64K DSU/CSU interface is in test or
loopback mode.
Operating the ARN
3-7