Telecommunications Techniques Corporation interceptor 147, Reference Manual, Page: 79 / 280

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INTERCEPTOR 147 2 Mbit/s and Data Analyzer
Setup Categories
3.5.4 Tx ABCD
Use the Tx ABCD item to set the four signaling bits
associated with the selected voice channel.
The format of the Tx ABCD item is:
Tx ABCD XXXX
where XXXX represents the four signaling bits. To set the
signaling bits, move the cursor to the bit you want to
change, and press SELECT.
CAUTION: Unless you have a specific reason to do so,
do not set Tx ABCD to 0000. Setting Tx
ABCD to all zeros can cause a false
multiframe alignment to occur in receiving
equipment.
Bit C becomes an uppercase “L” when the test instrument
is generating C-Bit loopcodes.
3.5.5 Tx Idle ABCD
The Tx Idle ABCD item is used to set the four signaling
bits that are inserted into the transmitted signal for each
idle channel.
The format of the Tx ABCD item is:
Tx Idle ABCD XXXX
where XXXX represents the four signaling bits. To set the
signaling bits, move the cursor to the bit you want to
change, and press SELECT.
CAUTION: Unless you have a specific reason to do so,
do not set TxIdle ABCD to 0000. Setting
TxIdle ABCD to all zeros can cause a false
multiframe alignment to occur in receiving
equipment.