The ETHERCOM RACK MOUNT 21 SLOT CHASSIS with 8 EFM14 Cards is a modular platform for Fast Ethernet media conversion and network testing. The system combines a 19-inch rack-mount ERM21C chassis with hot-swappable EFM14 media converter cards to extend network segment lengths, eliminate EMI, and provide lightning protection across enterprise and carrier deployments.
Technical Specifications
ERM21C Chassis
• 21-slot capacity for ERM series hot-swappable modules
• 19-inch rack mount, 2U height (3.5 inches)
• Dimensions: 17″ × 12″ × 4.5″
• Weight: 9.3 lbs (chassis); 1.2 lbs (blank cover plate)
• Internal auto-sensing power supply: 90–250 VAC input
• Optional redundant power supply available
• Rugged steel enclosure with IEC power connector
• LED indicators: 2 for power, 3 for fans
• Operating temperature: 14°F to 131°F (-10°C to 55°C)
• Storage temperature: -4°F to 140°F (-20°C to 60°C)
• Relative humidity: 5% to 90% (non-condensing)
• FCC Class A, CE compliance
• Designed and manufactured in the USA
EFM14 Media Converter Card (8 units included)
• Auto-negotiating 100BaseTX to 100BaseFX converter
• IEEE 802.3u compliant
• Copper: 1 × fully shielded RJ45 connector, 100BaseTX, 100 m max (Cat 5 UTP)
• Fiber: SC or ST connector options, 100BaseFX
• Multimode: up to 2 km; Single Mode (optional): up to 50 km
• MDI/MDIX crossover switch on 100TX side
• User-selectable half/full duplex control on 100FX port
• LED indicators: 1 power, 2 per port (Link/Receive)
• External 12 VDC power supply (110–240 VAC adaptable, included)
• Steel faceplate enclosure
• Designed and manufactured in the USA
– Key Features
• Hot-swappable module architecture enables card replacement without system shutdown
• Fiber integration eliminates electromagnetic interference and provides lightning protection
• Auto-negotiation simplifies Copper-to-Fiber deployment
• Optional redundant power supply maximizes uptime in mission-critical networks
– Typical Applications
• Fast Ethernet segment extension beyond standard copper distance limits
• Enterprise network isolation and noise reduction
• Carrier backbone integration with multimode or single-mode fiber
– Compatibility & Integration
The ERM21C chassis accommodates up to 21 ERM series modules, enabling mixed configurations of up to eight EFM14 cards alongside other compatible ERM modules within a single chassis.
