Glensound Copper 29, Handbook

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On Normal
Momentarily off Receiver overload. Can be caused by transient noise on the line.
Off, three short flashes, off Line current fault. Usually caused by the TBU being disconnected from the
line
Off, four long flashes, off DAA chip set fault
Off, five long flashes, off CPLD or DSP2 communication fault.
DIP configuration switches
A set of 12 DIP switches allow configuration of the TBU. The switch functions are described in the table below.
DIP Switch Settings
1 Network echo canceller enable.
2 Acoustic echo canceller enable. *See note below
3 Auto answer.
4 Auto answer period. Off 2 rings, On 8 Rings
5 DAA full scale. Off 0dBm (normal), On +6dBm
6 Telephone line line-up level.
7 Tone disconnect.
8 K-Break disconnect.
9 Ducker. *See note below
10 RX AGC.
11 RX noise gate.
12 B leg mix function. When enabled the B leg of the audio output will be a mix
of the send and receive signals.
*The acoustic echo canceller may be used to generate a clean feed where the mixing desk cannot generate one. When using a desk without a clean feed the
ducker function should not be used.