The Spirent DLS90 is a digital line simulator engineered to emulate twisted-pair telephone cable characteristics and last-mile conditions for telecommunications equipment testing. It reproduces real-world DSL and wireline network impairments in a controlled laboratory environment, enabling performance evaluation and compliance verification across a broad range of local loop and digital transmission products.
Technical Specifications
Line Simulation
• Emulates twisted PIC telephone cable characteristics with passive component modeling (L, R, C)
• Supports bi-directional signal pass-through, mimicking real cable behavior
• Cable length simulation: up to 6,350 feet in 50-foot increments (24 or 26 AWG); up to 9,350 feet with extended wireline option
• 0.4 mm PE gauge: up to 3 km in 50-meter increments; up to 6 km with extended wireline option (ETSI model)
• Bandwidth: up to 2 MHz usable simulation bandwidth
Signal Integrity
• Withstands 300 V differential (tip to ring) without breakdown
• Continuous sealing current capacity: 150 mA
• Accommodates ring voltage and loop current (line power)
Power
• 100–240 VAC, 50–60 Hz
– Key Features
• Front-panel LCD alpha-numeric display with push-button control for manual cable length adjustment
• Remote control via IEEE 488 and RS-232C interfaces for PC-based automation
• Available wireline gauges: 24 AWG, 26 AWG, or 0.4 mm PE
– Typical Applications
Ideal for testing 2-wire and 4-wire local loop products including ADSL, G.Lite, ISDN U-interface devices, DLC, DSL, HDSL, DDS products, Centrex Data Units, Digital Service Units (DSU), Switched 56 service units, wireline modems, wireline drivers, inverse multiplexers, and pair-gain systems.
– Compatibility & Integration
Supports standards-based testing requirements across digital subscriber line and wireline telecommunications networks.
