Instruction manual
ACU-1000 Operations Manual
2-16 Interoperability Now
2.9.5 LP-2 Module Connections
An LP-2 module may be plugged into slots 1 through 12 in an ACU-1000 chassis.
Table 2-7 LP-2 Module Connections- P1 through P12
PIN Signal Description
1
Ground
Ground connection.
2
NC
No 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
Tel Line 1 Tip
Telephone Line 1 Tip Connection.
7
Audio Ground
Audio ground connection for unbalanced inputs/outputs.
8
NC
No Connection
9
NC
No Connection
10
/VOX
VOX Output- Active low; used for special functions only
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
/PTT In
Input - Active low; used for special functions only
14
Tel Line 1 Ring
Telephone Line 1 Ring Connection.
15
NC
No Connection
2.9.6 Serial Remote Connector
This female 9-pin D-sub connector provides a serial RS-232 interface with the CPM-4 module.
The connector is labeled P15 on the backplane. Standard DCE pinout is used.
This connector should not be used simultaneously with the RJ-45 Ethernet connector on the
CPM-4 front panel.
Table 2-8 Serial Remote Connections- P15
PIN Signal
2
TX Data
3
RX Data
5
Ground