Z2 Controller Operations Manual
Interoperability Now
5
Z2C Installation and Operation Manual
Glossary
ACU
®
JPS Interoperability devices of various form factors that interface different types of
communications devices. Include ACU-1000/2000/M/T/5000/Z1.
ARA-1
TM
JPS device that provides a SIP interface to an individual radio or other four-wire device.
BSI
Bridging Systems Interface. A specification jointly developed by government and industry to
provide a standard interface for radio interoperability systems. The BSI is based on SIP and RTP
and allows bridging of radio nets between disparate interoperability systems.
COR
Carrier Operated Relay. A receiver signal that gives a positive indication a carrier or signal is being
received and the receiver is unsquelched. Same as
COS
.
COS
Carrier Operated Squelch. See
COR
.
Cross-
Connection
A link made between two communications systems (e.g.: radio, SIP, etc.) interfaced by an
interoperability gateway. This could include only systems local to the gateway, or be a “wide-area”
system that brings in remote systems via a network.
DHCP
Dynamic Host Control. IP network protocol that assigns IP addresses and network configuration
parameters a needed in order to avoid assigning static (unchanging) IP addresses.
Dispatch
Capability for a designated dispatcher to have one-way monitoring of and two-way private
conversations with audio source systems (channels) outside of interoperability net activity.
DNS
Domain Name System. Essential component of internet functionality; DNS is a system for naming
system computers, services, or other resources connected to the internet or a private network.
DTMF
Dual Tone Multi Frequency. The standard touch-tone telephone dialing method sends DTMF audio
characters over a PSTN line for control purposes. Can also be used with FM radio.
DSP
Digital Signal Processing (or Processor).
Hangtime
Sometimes called VOX Hangtime, Receive Hangtime, or Transmit Hangtime, a hangtime causes a
device to maintain the effect of audio presence for a brief period even without the actual presence
of audio. Hangtime is often used to prevent brief pauses in input audio from unkeying an attached
transmitter during the pauses. It may be applied to input audio to provide consistent audio to
multiple outputs (VOX Hangtime or Receive Hangtime) or, theoretically, applied to an output
audio to solely effect a single output (Transmit Hangtime).
Key
To key a transmitter means to cause it to transmit.
LAN
Local Area Network. Connects local devices in the same geographic location, such as a building.
LMR
Land Mobile Radio.
Monitor
Capability on ACU-Z1 and Z2 Controllers (and classic JPS interoperability products) for a channel
to monitor/listen to one or more other channels, independently of dispatch.
NAT
Network Address Translation. A mechanism that translates and hides internal LAN IP addresses
from the outside world, which only sees a WAN IP address.
NXU-2B
TM
Network Extension Unit. A JPS device that interfaces a radio or other 4-wire device to other
communications devices over an IP network. An NXU-2B uses RoIP. (Previous version NXU-2A).
PAT
Port Address Translation. (Sometimes referred to as ‘NAT Overlord’.) A mechanism employed
by a NAT router that allows internal hosts to use the same port numbers but expose different ports
to the WAN.
PBX
Private Branch Exchange. A telephone system owned and operated by a private company (such as
a manufacturing business) rather than by a telephone company such as ATT.
PCB
Printed Circuit Board.
PSTN
Public Switched Telephone Network. The world's public circuit-switched telephone network
which provides connectivity to fixed-line and mobile telephones.
PTT
Push-to-Talk. An active PTT signal causes a transmitter to key.
RoIP
Radio over Internet Protocol. JPS proprietary protocol which sends voice plus radio control signals
over an IP network.
RSP-Z2
JPS interoperability device interfaces radio, SIP, or RTP communications in a dual-channel
interoperability gateway.
RTP
Real-time Transport Protocol. Network protocol for delivering streaming audio over IP networks.