The Spirent GX1420B is a single-port copper Gigabit Ethernet module for the Spirent TestCenter platform and SmartBits systems. This SmartCard delivers wire-rate traffic generation and analysis across 100 Mbps and 1000 Mbps Ethernet speeds with full-duplex RJ-45 connectivity. It supports CAT 5 cabling up to 100 meters and enables comprehensive validation of routers, switches, and complex network infrastructures through hardware-based traffic control and packet analysis.
Technical Specifications
• Ethernet Speeds: 100 Mbps and 1000 Mbps (802.3ab)
• Interface: RJ-45, full-duplex
• Ports: 1
• Frame Size Range: 20 to 2048 bytes
• Packet Capture: 86 to 2048 packets (standard size)
• Cable Support: CAT 5 up to 100 meters
• Chassis Occupancy: 2 slots
– Key Features
• Wire-rate traffic generation with IP checksum support
• IP checksum error recognition and generation capability
• Multiple traffic modes: continuous, single-burst, multiple bursts, and echo
• Hardware-based IP flow generation (millions of flows)
• Frame size variation including oversized and undersized frames
• ARP relay analysis, ARP reply analysis, and ARP ping generation
• VLAN tagging generation
• Advanced reporting: triggers, counters, latency, and flow control
– Typical Applications
• Performance validation of complex router and switch deployments
• Network infrastructure stress testing
• Protocol compliance testing
• Packet capture and analysis workflows
– Compatibility & Integration
The GX1420B integrates with Spirent SmartBits SMB-200 and SMB-2000 Network Performance Analyzer devices. Configuration and control operate through Windows 98, 2000, and NT operating systems using Spirent SmartBits software tools.

















