The EXFO CoLT-250S SHDSL Qualifier is a portable handheld tester for field verification and qualification of Symmetric High-speed Digital Subscriber Line services on copper pairs. Designed for telecommunications technicians and network installers, it confirms service presence, measures actual connection rates, and displays critical performance parameters without guesswork. The device connects directly to copper infrastructure via RJ-45 terminated at 135 ohms, delivering essential diagnostics and troubleshooting data for SHDSL line quality assessment.
Technical Specifications
Physical and Environmental
• Dimensions: 23.5 cm × 11.4 cm × 3.8 cm
• Display: 16 character × 4 line backlit LCD
• Power source: 4 × ‘AA’ Alkaline batteries
• Battery life: Approximately 300 tests (typical usage)
• Operating temperature: 0 °C to 50 °C
• Humidity: 5 to 95% non-condensing
Line Interface and Connectivity
• Primary interface: RJ-45 connector, 135 ohm termination
• Test cable: RJ-45 with dual telco clips and RJ-11 connector for direct copper pair connection
• Data/upgrade port: RS232C/V.24 DB-9 for result download and firmware updates
SHDSL Performance Parameters
• Chipset: GlobeSpan STU-R
• Standards: ITU-T G.991.2, ITU-T G.994.1
• Operating modes: Annex A and Annex B
• Rate range (2-wire): 192 kbps to 2.3 Mbps in 8 kbps increments
• Measurements: Service confirmation, negotiated parameters (SNR Margin, Loop Attenuation via EOC), actual subscriber connection rates
– Key Features
• Single-button test activation with immediate results
• Multiple test result storage for trend analysis and field documentation
• GlobeSpan SHDSL modem implementation ensures GlobeSpan-compatible DSLAM compatibility
• Firmware upgradeable via integrated RS232 interface
• Operates across multiple local loop connection points
– Typical Applications
• SHDSL service installation and customer premise verification
• Line quality troubleshooting and performance validation
• Speed confirmation and parameter measurement at subscriber locations
– Compatibility & Integration
The CoLT-250S utilizes an actual GlobeSpan STU-R SHDSL modem, providing native compatibility with GlobeSpan-compatible DSLAMs and eliminating emulation limitations. Results transfer to external systems via RS232 serial connection for detailed analysis and record-keeping.
Included Accessories
• Test cable (RJ-45 to telco clips/RJ-11)
• User guide
• Soft pack carrying case
