Black Box BRTS-100 manual Speaker, Two Test Set units used for tracing

CHAPTER 5: Technical Reference

5.5 Speaker

The incoming frequency to the speaker is divided by eight. Since ISDN signals are transmitted at 96 KHz, it has to be reduced in order to be heard over the speaker.

When the Test Set is in TRACE TONE mode, the incoming frequency to the speaker is divided by four. So a TRACE tone received by the Test Set will be heard at 1 KHz. See Figure 5-9.

BRTS-100

⎟ 4

1KHz

REC.	4KHz	TRANS.
TRANS.	4KHz	REC.

BRTS-100

1KHz

⎟4

Figure 5-9. Two Test Set units used for tracing.

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