Black Box BRTS-100 manual Comprehensive troubleshooting flow chart 2

BRTS-100 ISDN TEST SET

13.a. If the terminal works, there’s no need to proceed any further.

b.If the terminal does not work, proceed to step 14.

14.Perform the PAIR REVERSAL test procedure (see page 22).

15.Put the circuit into its normal operating configuration. (Connect all terminals to the S/T interface.)

16.a. If the terminal works, there’s no need to proceed any further.

b.If the terminal does not work, proceed to step 17.

17.At this point, you’ve determined that there’s nothing wrong physically with the S/T interface. The problem is either within the terminal or NT1—or possibly the ISDN network. Perform the MONITOR test procedure (see page 26).

A

USING PASSIVE	NO
	MONITOR
BUS?
	YES
PB1 - CHECK	DONE
TERMINATIONS

TERMINAL	NO	PB2 - PAIR	TERMINAL
WORK?		REVERSAL	WORK?

NO

YES

YES

GOOD LINE,	GOOD LINE,
DONE	DONE

Figure 4-4. Comprehensive troubleshooting flow chart (2 of 2).

18