Biamp A4 - Manual (Page 111)

Component Objects
Double-clicking the Transmit block produces a control dialog box.
Output provides level adjustment and muting of outgoing audio signals.
The Dialer block provides several control input nodes:
nodes 1~16 trigger corresponding speed-dial numbers;
Rdl
triggers redial of last number; HF triggers hook flash;
and DM selects pulse dial mode (not currently supported).
A control output node (D) provides indication of dialing in
progress.
Double-clicking the Dialer block produces a control dialog box.
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