Instruction manual
ACU-1000 Operations Manual
Interoperability Now 2-15
2.9.3 DSP Module Connections – P1 through P12
A DSP-2 or DSP-3 module may be plugged into slots 1 through 12 in an ACU-1000 chassis.
Table 2-5 DSP-2 or DSP-3 Module Connections- P1 through P12
PIN Signal Description
1
Ground
Ground connection.
2
RXD
RX Data; used for special functions only.
3
/AUX Out 1
Auxiliary Output 1- Active low; used for special functions only.
4
/AUX In 1
Auxiliary Input 1- Active low; used for special functions only.
5
Ground
Ground connection.
6
TX Out B
Balanced transmit audio output.
7
Audio Ground
Audio ground connection for unbalanced inputs/outputs.
8
RX In A
Balanced receive audio input.
9
TXD
TX Data; used for special functions only.
10
/AUX Out 2
Auxiliary Output 2- Active low; used for special functions only.
11
/AUX In 2
Auxiliary Input 2- Active low; used for special functions only.
12
/PTT Out
Active low PTT output to a transmitter.
13
/COR In
COR input from a receiver, active low.
14
TX Out A
Balanced transmit audio output.
15
RX In B
Balanced receive audio input.
Note: For unbalanced TX audio, ground “B” pin of audio pair; connect unbalanced audio to “A” pin.
The DSP modules also have a front panel RJ-45 Ethernet connector.
2.9.4 PSTN-2 Module Connections
A PSTN-2 module may be plugged into slots 1 through 12 in an ACU-1000 chassis.
Table 2-6 PSTN-2 Module Connections- P1 through P12
PIN Signal Description
1
Ground
Ground connection.
2
Ground
Ground connection.
3
/AUX In 2
Auxiliary Input 2- Active low; used for special functions only.
4
/AUX Out 2
Auxiliary Output 2- Active low; used for special functions only.
5
Ground
Ground connection.
6
NC
No Connection
7
Audio Ground
Audio ground connection for unbalanced inputs/outputs.
8
NC
No Connection
9
Ground
Ground connection.
10
NC
No Connection
11
/AUX In 1
Auxiliary Input 1- Active low; used for special functions only.
12
/AUX Out 1
Auxiliary Output 1- Active low; used for special functions only.
13
NC
No Connection
14
NC
No Connection
15
NC
No Connection