1. Communications Systems | PRS 1AIP1 IP Audio Interface
PRS 1AIP1 IP Audio Interface
www.boschsecurity.com
u All‑in‑one solution for audio transport on
IP‑networks
u Supervised control inputs and outputs
u Supports re‑broadcasting
u Configurable audio delay on the output for
loudspeaker alignment
u Easy to install and configure via standard
web‑browser
The PRS‑1AIP1 is a universal, IP‑based audio device The unit provides two balanced line inputs and two
supporting VoIP and Audio over IP applications. It is an balanced line outputs. One of the inputs can be
ideal solution for bridging audio and contact closures configured as balanced microphone input with a
over long distance LAN and WAN networks, e.g. in and phantom power supply for electret / condenser
between conference centers and/or in remote microphones. The output level is configurable.
interpretation applications. It extends and interfaces A configurable audio delay can be used to artificially
to DCN systems and non‑network based traditional delay the playback of audio for loudspeaker alignment.
conference and public address systems without the
Audio Routing
need for a PC during operation.
Audio signals can be routed in uni‑cast to up to 16
The unit has analog audio inputs and outputs for easy
receivers, preconfigured or on activation of control
interfacing. One audio input can be switched to
inputs. Receivers are able to re-broadcast the
microphone sensitivity with built‑in microphone
incoming audio stream to other receivers. In case the
supervision. Also, the control inputs offer cable and
interfaces are on the same LAN also broadcast is
connection supervision.
supported.
Control inputs and outputs can be used to pass
In PCM and G.711 (uLaw and aLaw) full duplex audio
channel engaged events to the DCN system.
interfacing between two units is possible.
Functions Control inputs and outputs
The unit has eight control inputs. Eight control outputs
Audio
have dry relay contacts. Control inputs can be routed
Multiple audio formats are supported: single channel,
to control outputs for remote actions or to pass on
full duplex 16‑bit PCM or G.711 for very low latency,
fault information between audio transmitter and
and two-channel send or receive MP3 for high quality
receiver, in both directions. Control inputs can also be
audio with various sample rates and compression
configured to change the audio routing.
settings.
An additional dry relay contact is provided for fault
indication of the unit, including a high temperature
fault situation.
2. 2 | PRS 1AIP1 IP Audio Interface
Network Interfaces Impedance 1360 ohm
The unit interfaces to 10 and 100 Mbit Ethernet
networks and announces its IP‑address that was given Frequency response 100 Hz to 15 kHz
by a DHCP server. It can also search the network for a
S/N >60 dB
free IP‑address or can be given a static IP‑address. A
second Ethernet connection is available to support Supervision detection Electret: 0.4 – 5 mA
network redundancy. Dynamic: 120 – 1300 ohm
An RS 232 interface is build‑in to communicate
Line Inputs
additional serial data over the IP network.
Sensitivity -16.5 to +6 dBV
Power Supplies
Two power supply connections are provided as main Impedance 22 kohm
input and backup input with supervision of both
supplies. Frequency response 20 Hz to 15 kHz
Controls and Indicators (front) S/N >70 dB
• Reset button, recessed
Pilot tone detection level -30 dBV
• Two status indicator LEDs for network (input 2 only)
• Eight status LEDs for control inputs
Line outputs
Interconnections (rear)
• Eight control inputs on Euro‑connector Level 6 dBV max
• Eight control outputs on Euro‑connector
• Fault relay output on Euro‑connector Pilot tone level (output 2 only) -20 dBV (20 kHz)
• Two balanced audio inputs on Euro‑connector (one Audio formats
line input, one line / microphone input)
• Two balanced audio outputs on Euro‑connector MPEG 1-layer 3 (MP3) 32, 44.1 and 48 kHz sample rate
• Two Ethernet connections on RJ45
• RS 232 on Sub‑D Encoding up to 192 kbps VBR
• RS 485 on Euro‑connector (future use) Decoding up to 320 kbps (stereo)
• Main power supply on jack
• Backup power supply on Euro‑connector MPEG 1-layer 2 16, 22.05 and 24 kHz sample
rate
Certifications and Approvals
G.711 uLaw, aLaw at 8, 24 or 32 kHz
sample rate
Safety acc. to IEC 60065‑98
PCM 16‑bit at 8, 24 or 32 kHz sample
Immunity acc. to EN 55103‑2 /
rate
EN 50130‑4 / EN 55024
Control inputs 8x
Emissions acc. to EN 55103‑1 / EN 55022
Connectors Removable screw terminals
Emergency acc. to EN 60849
Operation Closing contact (with
Parts Included supervision)
Control / fault outputs 8x/1x
Quantity Component
Connectors Removable screw terminals
1 PRS-1AIP1 IP Audio Interface
Operation Make contact (SPST, voltage
1 Power supply
free)
1 Set of connectors
Rating 24 V, 0.5 A
Technical Specifications Ethernet
Electrical Connector Dual RJ45, DTE-pinout
External power supply 1 18 to 56 VDC Standard 802.3i / 802.3u
External power supply 2 18 to 56 VDC Speed 10 / 100 Mbps, auto-negotiation
Power consumption 8 W max Flow Full / half-duplex, auto-
negotiation
Microphone input
Protocol TCP/IP, UDP, RTP, IGMP, DHCP,
Sensitivity -48.5 to -26 dBV SNMP
