Instruction manual

ACU-1000 Operations Manual
Interoperability Now 1-11
1.6.5 CPM-4
The ACU-1000 Control Processor Module controls the entire chassis via an internal high-speed
serial bus; it requests and receives status and information from each module and sends
commands to each module. It instructs modules to output their audio to one of the system audio
buses. The CPM-4 has a front panel RJ-45 Ethernet port that allows connection to a single PC
(running the ACU Controller Program) or to an IP-based network (for control by either the
ACU Controller or the WAIS Controller. Alternatively, rear panel RS-232 serial port allows
the same connectivity, either directly to a single PC via that computer’s serial port, or (in
conjunction with an ETS-1 unit) to a network. A PC interfaced to the CPM-4’s RJ-45
connector can browse to the CPM-4’s IP address to check or modify the module’s
configuration parameters. The front panel of the CPM-4 Module also contains a Fault LED,
along with Master and Expansion LEDs that indicate the unit's status in an expanded system.
1.6.6 DSP-2 Module
This module is the main 4-wire interface and Ethernet RoIP module. It is used to interface
radios and other 4-wire devices to the ACU-1000 or to interface a Network Talkpath (VoIP link
with control signals) to the unit. It provides important DSP-based interface functions such as
three types of COR (hardwired signal, VMR, and VOX), DSP noise reduction, DTMF
decoder/generator, audio level adjustments, audio shaping, etc. The VMR and Noise Reduction
capability make it ideal for an HF radio interface.
The DSP-2 has a front panel RJ-45 Ethernet port and associated circuitry to create a network
connection to the ACU-1000. The DSP-2 may create a network talkpath to another DSP-2 in a
second ACU-1000 system or to an NXU-2A unit that’s interfaced to the same IP-based
network. A PC cabled to the RJ-45 Ethernet port can browse to the DSP-2’s IP address to
configure the DSP-2.
1.6.7 PSTN-2 Module
The PSTN Module is the 2-wire interface between the ACU system and a telephone system (as
opposed to a telephone set). A telephone system is an entity that
accepts dialing information
and processes calls, such as a PSTN line, PABX line, terminal, or cellular phone. (A telephone
set is a device that
generates
The module has a DSP hybrid and VOX with configurable sensitivity and hangtime. It has a
DTMF receiver/generator for control and call progress recognition. There are two uncommitted
auxiliary parallel inputs and two uncommitted auxiliary parallel outputs.
dialing information. It is interfaced to the ACU system via the
LP-2 Module.) The PSTN-2 contains one 2-wire front-panel RJ-11C jack for interfacing with
PSTN lines or satellite equipment. The module contains ring detect circuitry for automated
system operation.