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54 | Section 5
4-channel ♦
In this mode there are up to four caller inputs/outputs.
e L and R of each AES signal are used, creating four independent caller inputs and
four caller outputs.
To use this mode, your mixing console must be capable of splitting and combining
separate channels of audio to and from the L/R pairs of AES signals. is is sometimes
called the ‘dual mono’ mode of AES operation.
Program on Hold is via the analog inputs.
AES POH (AES Program On Hold)
♦
In this mode there are two caller inputs/outputs and two AES Program on Hold inputs.
In the case when only two caller inputs/outputs are needed and the mixing console is
capable of splitting and combining separate channels of caller audio to and from the L/R
pairs of AES signals, this mode allows the Program on Hold to also be via AES. e
caller inputs use AES XLR Caller input 1 (both L / R channels), and Program on Hold
inputs use AES XLR input 2 (both L / R channels).
e following table shows the relationships of AES to the input and output signal paths shown
in the block diagrams above:
2-channel
(1 XLR connection)
2-channel
(2 XLR connections)
4-channel AES POH
AES in 1 L “input 1” “Input 1” “Input 1” “Input 1”
AES in 1 R “Input 2” “Input 2” “Input 2”
AES in 2 L “Input 2” “Input 3” POH in 1
AES in 2 R “Input 4” POH in 2
AES out 1 L “Output 1” “Output 1” “Output 1” “Output 1”
AES out 1 R “Output 2” “Output 2” “Output 2” “Output 2”
AES out 2 L “Output 2” “Output 2” “Output 3” “Output 2”
AES out 2 R “Output 1” “Output 1” “Output 4” “Output 1”
5.5 The Telco Menu
POTS Country
Affects analog lines only.
is setting configures the analog Telco line interfaces for proper impedance matching and
other characteristics for different countries. If your country is not listed, try using: CTR21
(European standard) or USA.
Hookash
Affects analog lines only.
It adjusts the duration of the ‘hook flash’ (loop current interruption) when the Desktop Director
(transfer) key is pressed. e default value is 720 milliseconds. e following table indicates
typical values for various countries: