• Operating Modes:
• Terminal Mode
• Monitor Mode
• Drop & Insert Mode
• Error Injection
• Automated Test Sequences
• Pointer Adjustment
• DS1 Drop Scan
• Signaling Scan

The HP E4487A CERJAC 31XE DS3/SONET electrical test set provides comprehensive testing and monitoring for DS3 transmission circuits and equipment. And as modular options are added the 31XE can test DS1, E1, and DS0 transmission rates, as well as SONET STS-1 and VT1.5, including jitter measurement at DS1, E1, DS3, and STS-1.