SUCHEN SIE DIE PASSENDE
INDUSTRIELLE LÖSUNG?
Entdecken Sie Embedded-, Kommunikations- und Automatisierungslösungen für Ihre Anwendung.
- 8x 10/100Base-T(X) PoE P.S.E. Ports: All eight RJ45 ports support IEEE 802.3at PoE standard, delivering up to 30W per port.
- Total Power Budget: 120W total PoE power output capacity (maximum 30W per port).
- Unmanaged Operation: Plug-and-play functionality with no configuration required, ideal for simple network deployments.
- Auto-Negotiation & Auto-MDI/MDI-X: Automatically detects link speed and cable type for seamless connectivity.
- Store-and-Forward Switching: Ensures reliable data transmission with error checking and buffering.
- Flow Control Support: Implements IEEE 802.3x flow control for full-duplex and backpressure for half-duplex operation.
- Redundant Power Inputs: Dual 50–57VDC inputs on a 6-pin terminal block for uninterrupted operation.
- Power Failure Relay Alarm: Configurable via DIP switch to trigger alarms on power input failure.
- Surge and ESD Protection: 4kV ESD protection on Ethernet ports and 2000VDC surge protection on power input.
- Slim IP30 Metal Enclosure: Compact 26.1mm width for space-constrained installations, with DIN-rail and wall-mount options.
- Wide Operating Temperature: -40°C to +70°C for reliable performance in extreme industrial conditions.
- Low Power Consumption: Typical consumption of 4.5W (excluding PoE load).
- High Reliability: Designed for continuous operation with redundant power and fault relay output.
- Comprehensive LED Indicators: Power, fault, link/activity, and PoE status LEDs for easy monitoring.
- Long-Term Warranty: 5-year manufacturer warranty.
- Total Power Budget: 120W total PoE power output capacity (maximum 30W per port).
- Unmanaged Operation: Plug-and-play functionality with no configuration required, ideal for simple network deployments.
- Auto-Negotiation & Auto-MDI/MDI-X: Automatically detects link speed and cable type for seamless connectivity.
- Store-and-Forward Switching: Ensures reliable data transmission with error checking and buffering.
- Flow Control Support: Implements IEEE 802.3x flow control for full-duplex and backpressure for half-duplex operation.
- Redundant Power Inputs: Dual 50–57VDC inputs on a 6-pin terminal block for uninterrupted operation.
- Power Failure Relay Alarm: Configurable via DIP switch to trigger alarms on power input failure.
- Surge and ESD Protection: 4kV ESD protection on Ethernet ports and 2000VDC surge protection on power input.
- Slim IP30 Metal Enclosure: Compact 26.1mm width for space-constrained installations, with DIN-rail and wall-mount options.
- Wide Operating Temperature: -40°C to +70°C for reliable performance in extreme industrial conditions.
- Low Power Consumption: Typical consumption of 4.5W (excluding PoE load).
- High Reliability: Designed for continuous operation with redundant power and fault relay output.
- Comprehensive LED Indicators: Power, fault, link/activity, and PoE status LEDs for easy monitoring.
- Long-Term Warranty: 5-year manufacturer warranty.
Comprehensive Product Summary – ORing IPS-1080A Industrial Unmanaged PoE Ethernet Switch
### 1. Product Overview
Product Name: Industrial Unmanaged PoE Ethernet Switch
Model: IPS-1080A
Series: IPS Industrial PoE Switch Series
Article Number: IPS-1080A
Manufacturer: ORing Industrial Networking Corp.
Version: 1.0
Product Type: Slim-type unmanaged industrial Ethernet switch with Power Sourcing Equipment (P.S.E.) functionality
The ORing IPS-1080A is a compact, rugged, and reliable unmanaged industrial Ethernet switch designed for harsh environments requiring Power over Ethernet (PoE) capability. It provides eight 10/100Base-T(X) ports with integrated P.S.E. functionality, enabling simultaneous data and power transmission over standard Ethernet cabling. The device is engineered for industrial automation, surveillance, and transportation applications where high reliability, extended temperature tolerance, and redundant power inputs are essential.
### 2. Key Features
- 8x 10/100Base-T(X) PoE P.S.E. Ports: All eight RJ45 ports support IEEE 802.3at PoE standard, delivering up to 30W per port.
- Total Power Budget: 120W total PoE power output capacity (maximum 30W per port).
- Unmanaged Operation: Plug-and-play functionality with no configuration required, ideal for simple network deployments.
- Auto-Negotiation & Auto-MDI/MDI-X: Automatically detects link speed and cable type for seamless connectivity.
- Store-and-Forward Switching: Ensures reliable data transmission with error checking and buffering.
- Flow Control Support: Implements IEEE 802.3x flow control for full-duplex and backpressure for half-duplex operation.
- Redundant Power Inputs: Dual 50–57VDC inputs on a 6-pin terminal block for uninterrupted operation.
- Power Failure Relay Alarm: Configurable via DIP switch to trigger alarms on power input failure.
- Surge and ESD Protection: 4kV ESD protection on Ethernet ports and 2000VDC surge protection on power input.
- Slim IP30 Metal Enclosure: Compact 26.1mm width for space-constrained installations, with DIN-rail and wall-mount options.
- Wide Operating Temperature: -40°C to +70°C for reliable performance in extreme industrial conditions.
- Low Power Consumption: Typical consumption of 4.5W (excluding PoE load).
- High Reliability: Designed for continuous operation with redundant power and fault relay output.
- Comprehensive LED Indicators: Power, fault, link/activity, and PoE status LEDs for easy monitoring.
- Long-Term Warranty: 5-year manufacturer warranty.
### 3. Technical Specifications
Ethernet Ports:
- 8 × 10/100Base-T(X) RJ45 ports with PoE P.S.E. capability
- Auto MDI/MDI-X and auto-negotiation supported
PoE (Power over Ethernet):
- Standard: IEEE 802.3at compliant
- Power Output: Up to 30W per port
- Total Power Budget: 120W
- Pin Assignment:
- Pin 1: TD+ with PoE Power +
- Pin 2: TD– with PoE Power +
- Pin 3: RD+ with PoE Power –
- Pin 6: RD– with PoE Power –
Switching Technology:
- Switching Method: Store-and-forward
- MAC Address Table: 2048 entries
- Flow Control: IEEE 802.3x (full-duplex) and backpressure (half-duplex)
Power Supply:
- Input Voltage: Dual 50–57VDC (redundant inputs)
- Connector: 6-pin removable terminal block
- Power Consumption: 4.5W (typical, excluding PoE load)
- Protection: Overload current protection, reverse polarity protection
Mechanical Design:
- Enclosure: IP30-rated metal housing
- Dimensions (W × D × H): 26.1 × 94.9 × 144.3 mm (1.03 × 3.74 × 5.68 in)
- Weight: 395 g
- Mounting: DIN-rail and wall-mount options
Environmental Conditions:
- Operating Temperature: -40°C to +70°C (-40°F to +158°F)
- Storage Temperature: -40°C to +85°C (-40°F to +185°F)
- Operating Humidity: 5%–95% (non-condensing)
LED Indicators:
- Power 1 (PWR1): Green
- Power 2 (PWR2): Green
- Fault: Amber (indicates PWR1 or PWR2 failure)
- Port Link/Activity: Green
- PoE Power Active: Green
Relay Output:
- Capacity: 1A @ 24VDC
- Function: Power failure alarm (configurable via DIP switch)
### 4. Functionality
The IPS-1080A operates as an unmanaged Ethernet switch, automatically forwarding packets between connected devices without requiring configuration. Each of its eight ports supports both data transmission and PoE power delivery, enabling direct connection of PoE-enabled devices such as IP cameras, wireless access points, VoIP phones, and industrial sensors.
Use Cases and Applications:
- Industrial Automation: Connecting PLCs, sensors, and controllers in manufacturing environments.
- Surveillance Systems: Powering and networking IP cameras in outdoor or factory settings.
- Transportation and ITS: Providing network connectivity for roadside equipment and monitoring systems.
- Building Management: Integrating access control, HVAC, and lighting systems via PoE.
- Utility and Energy: Supporting remote monitoring devices in substations or renewable energy installations.
Compatibility:
The switch is compatible with standard Ethernet devices supporting 10/100Base-T(X) and IEEE 802.3af/at PoE standards. It can interoperate with other ORing switches or third-party network equipment.
### 5. Components & Accessories
Included Items:
1. IPS-1080A switch unit
2. 6-pin terminal block for power input
3. Dust covers for RJ45 ports
4. Wall-mounting kit (for slim type)
5. 25mm DIN-rail mounting kit
6. M3×3 round screws
7. Quick Installation Guide (QIG)
Optional Accessories:
- External DC power supplies (50–57VDC)
- Industrial-grade Ethernet cables
- DIN-rail mounting brackets (replacement or extended types)
Connectors:
- Ethernet Ports: 8 × RJ45 (8-pin) connectors
- Power Input: 6-pin terminal block (V1+, V1–, V2+, V2–, FG)
- Relay Output: 2-pin terminal block for alarm connection
### 6. Installation & Setup
Mounting Options:
- DIN-Rail Installation:
1. Attach the DIN-rail clip to the back of the switch.
2. Hook the top of the clip onto the DIN rail.
3. Press the bottom of the switch until it snaps securely into place.
- Wall-Mount Installation:
1. Attach the wall-mount brackets using the provided M3 screws.
2. Secure the switch to the wall or panel surface.
Power Connection:
- Connect dual DC power sources (50–57VDC) to the terminal block.
- Ensure correct polarity (V+ and V–).
- Frame ground (FG) should be connected for safety and EMI reduction.
- The redundant design ensures continuous operation if one power source fails.
DIP Switch Configuration:
- DIP-1: Power failure relay alarm disabled (OFF)
- DIP-2: PWR1 failure alarm enabled (ON)
- DIP-3: PWR2 failure alarm enabled (ON)
- When both DIP-2 and DIP-3 are ON, the relay alarm activates upon failure of either power input.
Ethernet Cabling:
- Supports both straight-through and cross-over RJ45 cables.
- Standard pin assignments for 10/100Base-T(X) connections.
- Recommended cable: Cat5e or higher twisted-pair cable.
Setup:
- As an unmanaged switch, no software configuration is required.
- Simply connect powered devices (PDs) and power sources; the switch automatically negotiates link speed and PoE power delivery.
### 7. Performance & Capabilities
Switching Performance:
- Non-blocking architecture ensures full wire-speed forwarding on all ports.
- Store-and-forward mechanism provides error checking and frame integrity.
- MAC address learning supports up to 2048 entries for efficient traffic management.
PoE Performance:
- Each port can deliver up to 30W, compliant with IEEE 802.3at (PoE+).
- Total power budget of 120W allows simultaneous powering of multiple devices.
- Intelligent power management ensures stable operation under full load.
Reliability & Redundancy:
- Dual power inputs with automatic failover prevent downtime.
- Relay output provides external alarm signaling for power failure events.
- Surge and ESD protection safeguard against electrical disturbances.
Efficiency:
- Low internal power consumption (~4.5W) minimizes heat generation.
- Passive cooling design with no moving parts enhances durability and reduces maintenance.
Limitations:
- Unmanaged design means no VLAN, QoS, or SNMP management features.
- Limited to 10/100 Mbps speeds (no Gigabit support).
- PoE power budget shared across all ports (120W total).
### 8. Standards & Compliance
Ethernet Standards:
- IEEE 802.3 (10Base-T)
- IEEE 802.3u (100Base-TX)
- IEEE 802.3x (Flow Control)
- IEEE 802.3at (PoE+ up to 30W per port)
EMI/EMS Compliance:
- FCC Part 15 Class A
- CISPR (EN55022) Class A
- EN61000-4-2 (ESD)
- EN61000-4-3 (Radiated Susceptibility)
- EN61000-4-4 (EFT/Burst)
- EN61000-4-5 (Surge)
- EN61000-4-6 (Conducted Susceptibility)
- EN61000-4-8 (Magnetic Field)
- EN61000-4-11 (Voltage Dips and Interruptions)
Environmental & Mechanical Tests:
- Shock: IEC60068-2-27
- Vibration: IEC60068-2-6
- Free Fall: IEC60068-2-32
Safety Certification:
- EN60950-1 (Information Technology Equipment Safety)
Ingress Protection:
- IP30-rated metal enclosure for protection against solid objects >2.5mm.
### 9. Additional Information
Warranty:
- 5-year limited hardware warranty provided by ORing Industrial Networking Corp.
Support & Maintenance:
- Technical support available via email and phone.
- Firmware updates not applicable (unmanaged device).
- Maintenance limited to periodic inspection and cleaning of connectors and power terminals.
Manufacturer Contact Information:
- Company: ORing Industrial Networking Corp.
- Telephone: +886-2-2218-1066
- Fax: +886-2-2218-1014
- Email: support@oring-networking.com
- Website: [www.oring-networking.com](http://www.oring-networking.com)
Documentation:
- Quick Installation Guide (QIG) included in package.
- Printed on recycled paper (document code: 1907-2-29-IPS1080A-0).
Maintenance Recommendations:
- Ensure adequate ventilation and avoid exposure to direct sunlight or corrosive environments.
- Regularly check power connections and grounding.
- Replace damaged cables or connectors immediately.
- Clean with dry, lint-free cloth; avoid solvents or liquids.
Lifecycle & Reliability:
- Designed for continuous 24/7 operation in industrial environments.
- Passive cooling and solid-state design ensure long service life.
- Redundant power and alarm relay enhance system reliability.
### Summary
The ORing IPS-1080A is a robust, industrial-grade unmanaged Ethernet switch engineered for environments demanding high reliability and PoE functionality. With eight 10/100Base-T(X) ports supporting IEEE 802.3at PoE+, it can power multiple networked devices while maintaining stable data communication. Its slim IP30 metal housing, wide temperature tolerance, redundant power inputs, and comprehensive protection features make it ideal for industrial automation, surveillance, and transportation networks. The device’s plug-and-play design simplifies deployment, while its 5-year warranty and compliance with international standards ensure long-term dependability in mission-critical applications.
### 1. Product Overview
Product Name: Industrial Unmanaged PoE Ethernet Switch
Model: IPS-1080A
Series: IPS Industrial PoE Switch Series
Article Number: IPS-1080A
Manufacturer: ORing Industrial Networking Corp.
Version: 1.0
Product Type: Slim-type unmanaged industrial Ethernet switch with Power Sourcing Equipment (P.S.E.) functionality
The ORing IPS-1080A is a compact, rugged, and reliable unmanaged industrial Ethernet switch designed for harsh environments requiring Power over Ethernet (PoE) capability. It provides eight 10/100Base-T(X) ports with integrated P.S.E. functionality, enabling simultaneous data and power transmission over standard Ethernet cabling. The device is engineered for industrial automation, surveillance, and transportation applications where high reliability, extended temperature tolerance, and redundant power inputs are essential.
### 2. Key Features
- 8x 10/100Base-T(X) PoE P.S.E. Ports: All eight RJ45 ports support IEEE 802.3at PoE standard, delivering up to 30W per port.
- Total Power Budget: 120W total PoE power output capacity (maximum 30W per port).
- Unmanaged Operation: Plug-and-play functionality with no configuration required, ideal for simple network deployments.
- Auto-Negotiation & Auto-MDI/MDI-X: Automatically detects link speed and cable type for seamless connectivity.
- Store-and-Forward Switching: Ensures reliable data transmission with error checking and buffering.
- Flow Control Support: Implements IEEE 802.3x flow control for full-duplex and backpressure for half-duplex operation.
- Redundant Power Inputs: Dual 50–57VDC inputs on a 6-pin terminal block for uninterrupted operation.
- Power Failure Relay Alarm: Configurable via DIP switch to trigger alarms on power input failure.
- Surge and ESD Protection: 4kV ESD protection on Ethernet ports and 2000VDC surge protection on power input.
- Slim IP30 Metal Enclosure: Compact 26.1mm width for space-constrained installations, with DIN-rail and wall-mount options.
- Wide Operating Temperature: -40°C to +70°C for reliable performance in extreme industrial conditions.
- Low Power Consumption: Typical consumption of 4.5W (excluding PoE load).
- High Reliability: Designed for continuous operation with redundant power and fault relay output.
- Comprehensive LED Indicators: Power, fault, link/activity, and PoE status LEDs for easy monitoring.
- Long-Term Warranty: 5-year manufacturer warranty.
### 3. Technical Specifications
Ethernet Ports:
- 8 × 10/100Base-T(X) RJ45 ports with PoE P.S.E. capability
- Auto MDI/MDI-X and auto-negotiation supported
PoE (Power over Ethernet):
- Standard: IEEE 802.3at compliant
- Power Output: Up to 30W per port
- Total Power Budget: 120W
- Pin Assignment:
- Pin 1: TD+ with PoE Power +
- Pin 2: TD– with PoE Power +
- Pin 3: RD+ with PoE Power –
- Pin 6: RD– with PoE Power –
Switching Technology:
- Switching Method: Store-and-forward
- MAC Address Table: 2048 entries
- Flow Control: IEEE 802.3x (full-duplex) and backpressure (half-duplex)
Power Supply:
- Input Voltage: Dual 50–57VDC (redundant inputs)
- Connector: 6-pin removable terminal block
- Power Consumption: 4.5W (typical, excluding PoE load)
- Protection: Overload current protection, reverse polarity protection
Mechanical Design:
- Enclosure: IP30-rated metal housing
- Dimensions (W × D × H): 26.1 × 94.9 × 144.3 mm (1.03 × 3.74 × 5.68 in)
- Weight: 395 g
- Mounting: DIN-rail and wall-mount options
Environmental Conditions:
- Operating Temperature: -40°C to +70°C (-40°F to +158°F)
- Storage Temperature: -40°C to +85°C (-40°F to +185°F)
- Operating Humidity: 5%–95% (non-condensing)
LED Indicators:
- Power 1 (PWR1): Green
- Power 2 (PWR2): Green
- Fault: Amber (indicates PWR1 or PWR2 failure)
- Port Link/Activity: Green
- PoE Power Active: Green
Relay Output:
- Capacity: 1A @ 24VDC
- Function: Power failure alarm (configurable via DIP switch)
### 4. Functionality
The IPS-1080A operates as an unmanaged Ethernet switch, automatically forwarding packets between connected devices without requiring configuration. Each of its eight ports supports both data transmission and PoE power delivery, enabling direct connection of PoE-enabled devices such as IP cameras, wireless access points, VoIP phones, and industrial sensors.
Use Cases and Applications:
- Industrial Automation: Connecting PLCs, sensors, and controllers in manufacturing environments.
- Surveillance Systems: Powering and networking IP cameras in outdoor or factory settings.
- Transportation and ITS: Providing network connectivity for roadside equipment and monitoring systems.
- Building Management: Integrating access control, HVAC, and lighting systems via PoE.
- Utility and Energy: Supporting remote monitoring devices in substations or renewable energy installations.
Compatibility:
The switch is compatible with standard Ethernet devices supporting 10/100Base-T(X) and IEEE 802.3af/at PoE standards. It can interoperate with other ORing switches or third-party network equipment.
### 5. Components & Accessories
Included Items:
1. IPS-1080A switch unit
2. 6-pin terminal block for power input
3. Dust covers for RJ45 ports
4. Wall-mounting kit (for slim type)
5. 25mm DIN-rail mounting kit
6. M3×3 round screws
7. Quick Installation Guide (QIG)
Optional Accessories:
- External DC power supplies (50–57VDC)
- Industrial-grade Ethernet cables
- DIN-rail mounting brackets (replacement or extended types)
Connectors:
- Ethernet Ports: 8 × RJ45 (8-pin) connectors
- Power Input: 6-pin terminal block (V1+, V1–, V2+, V2–, FG)
- Relay Output: 2-pin terminal block for alarm connection
### 6. Installation & Setup
Mounting Options:
- DIN-Rail Installation:
1. Attach the DIN-rail clip to the back of the switch.
2. Hook the top of the clip onto the DIN rail.
3. Press the bottom of the switch until it snaps securely into place.
- Wall-Mount Installation:
1. Attach the wall-mount brackets using the provided M3 screws.
2. Secure the switch to the wall or panel surface.
Power Connection:
- Connect dual DC power sources (50–57VDC) to the terminal block.
- Ensure correct polarity (V+ and V–).
- Frame ground (FG) should be connected for safety and EMI reduction.
- The redundant design ensures continuous operation if one power source fails.
DIP Switch Configuration:
- DIP-1: Power failure relay alarm disabled (OFF)
- DIP-2: PWR1 failure alarm enabled (ON)
- DIP-3: PWR2 failure alarm enabled (ON)
- When both DIP-2 and DIP-3 are ON, the relay alarm activates upon failure of either power input.
Ethernet Cabling:
- Supports both straight-through and cross-over RJ45 cables.
- Standard pin assignments for 10/100Base-T(X) connections.
- Recommended cable: Cat5e or higher twisted-pair cable.
Setup:
- As an unmanaged switch, no software configuration is required.
- Simply connect powered devices (PDs) and power sources; the switch automatically negotiates link speed and PoE power delivery.
### 7. Performance & Capabilities
Switching Performance:
- Non-blocking architecture ensures full wire-speed forwarding on all ports.
- Store-and-forward mechanism provides error checking and frame integrity.
- MAC address learning supports up to 2048 entries for efficient traffic management.
PoE Performance:
- Each port can deliver up to 30W, compliant with IEEE 802.3at (PoE+).
- Total power budget of 120W allows simultaneous powering of multiple devices.
- Intelligent power management ensures stable operation under full load.
Reliability & Redundancy:
- Dual power inputs with automatic failover prevent downtime.
- Relay output provides external alarm signaling for power failure events.
- Surge and ESD protection safeguard against electrical disturbances.
Efficiency:
- Low internal power consumption (~4.5W) minimizes heat generation.
- Passive cooling design with no moving parts enhances durability and reduces maintenance.
Limitations:
- Unmanaged design means no VLAN, QoS, or SNMP management features.
- Limited to 10/100 Mbps speeds (no Gigabit support).
- PoE power budget shared across all ports (120W total).
### 8. Standards & Compliance
Ethernet Standards:
- IEEE 802.3 (10Base-T)
- IEEE 802.3u (100Base-TX)
- IEEE 802.3x (Flow Control)
- IEEE 802.3at (PoE+ up to 30W per port)
EMI/EMS Compliance:
- FCC Part 15 Class A
- CISPR (EN55022) Class A
- EN61000-4-2 (ESD)
- EN61000-4-3 (Radiated Susceptibility)
- EN61000-4-4 (EFT/Burst)
- EN61000-4-5 (Surge)
- EN61000-4-6 (Conducted Susceptibility)
- EN61000-4-8 (Magnetic Field)
- EN61000-4-11 (Voltage Dips and Interruptions)
Environmental & Mechanical Tests:
- Shock: IEC60068-2-27
- Vibration: IEC60068-2-6
- Free Fall: IEC60068-2-32
Safety Certification:
- EN60950-1 (Information Technology Equipment Safety)
Ingress Protection:
- IP30-rated metal enclosure for protection against solid objects >2.5mm.
### 9. Additional Information
Warranty:
- 5-year limited hardware warranty provided by ORing Industrial Networking Corp.
Support & Maintenance:
- Technical support available via email and phone.
- Firmware updates not applicable (unmanaged device).
- Maintenance limited to periodic inspection and cleaning of connectors and power terminals.
Manufacturer Contact Information:
- Company: ORing Industrial Networking Corp.
- Telephone: +886-2-2218-1066
- Fax: +886-2-2218-1014
- Email: support@oring-networking.com
- Website: [www.oring-networking.com](http://www.oring-networking.com)
Documentation:
- Quick Installation Guide (QIG) included in package.
- Printed on recycled paper (document code: 1907-2-29-IPS1080A-0).
Maintenance Recommendations:
- Ensure adequate ventilation and avoid exposure to direct sunlight or corrosive environments.
- Regularly check power connections and grounding.
- Replace damaged cables or connectors immediately.
- Clean with dry, lint-free cloth; avoid solvents or liquids.
Lifecycle & Reliability:
- Designed for continuous 24/7 operation in industrial environments.
- Passive cooling and solid-state design ensure long service life.
- Redundant power and alarm relay enhance system reliability.
### Summary
The ORing IPS-1080A is a robust, industrial-grade unmanaged Ethernet switch engineered for environments demanding high reliability and PoE functionality. With eight 10/100Base-T(X) ports supporting IEEE 802.3at PoE+, it can power multiple networked devices while maintaining stable data communication. Its slim IP30 metal housing, wide temperature tolerance, redundant power inputs, and comprehensive protection features make it ideal for industrial automation, surveillance, and transportation networks. The device’s plug-and-play design simplifies deployment, while its 5-year warranty and compliance with international standards ensure long-term dependability in mission-critical applications.
-
Datasheet_IPS-1080A_v1.0.pdf
PDF Catalog
-
QIG_IPS-1080A_V1.0.pdf
Manual
Kein Zubehör vorhanden.