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41
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.
Figure 5-9. Two Test Set units used for tracing.
BRTS-100
1KHz
REC.
TRANS.
÷4
4KHz
4KHz
TRANS.
REC.
BRTS-100
1KHz
÷4