Technical data

Installing and Operating BayStack ARN/DC Routers

3-6

116273-B Rev 00

Adapter Module LEDs

When the ARN/DC has an optional serial, ISDN, 56/64K DSU/CSU, FE1/E1

DSU/CSU, FT1/T1 DSU/CSU, X.25 PAD, or V.34 modem adapter module

installed, its interface LEDs are visible on the front panel. For the location of the

two ARN/DC adapter module slots, see Figure 1-4 on page 1-9.

Serial LED

Table 3-7

describes the serial adapter module LED.

ISDN BRI LEDs (S/T or U Interfaces)

Table 3-8

describes the ISDN BRI adapter module LEDs.

Note:

The ARN/DC base module boots to a fully operational state before

bringing up adapter module interfaces.

Table 3-7. Serial LED

LED Meaning

RLSD Lights when Received Line Signal Detection (RLSD) is active on the

serial interface (COM1 or COM2).

Table 3-8. ISDN BRI LEDs

LED Meaning

S/T Interface

Unlabeled LED Lights when the ARN/DC is using the D Channel.

U Interface

D (D-channel; 16 Kb/s management

channel)

Lights when the ARN/DC is using the D-channel.

(Data Detect)

Lights when the interface detects a connection to

an external device such as a switch.

(B-Channel #1; 64 Kb/s data channel)

Lights when the ARN/DC is using B Channel #1.

(B-Channel #2; 64 Kb/s data channel)

Lights when the ARN/DC is using B Channel #2.