SPA‑4XT3/E3 Specifications
Cisco 4‑Port Clear Channel T3/E3 Shared Port Adapter
Manufacturer: Cisco
Manufacturer Model: SPA‑4XT3/E3
Product Line: Cisco Shared Port Adapters (SPA)
Product Series: Clear Channel T3/E3 (4‑Port)
Product Type: Interface / Port Adapter Module
Product Name: Cisco 4‑Port Clear Channel T3/E3 SPA Module
KEY FEATURES:
Port Count: 4 × Clear‑Channel ports configurable as either T3 (44.736 Mb/s) or E3 (34.368 Mb/s)
Interface Type: T3/E3 over 75‑ohm coax (1.0/2.3 RF connectors)
Hot‑Swap Support: Yes — Online Insertion and Removal (OIR) supported
Subrate & Scrambling Support: Compatible with multiple DSU vendors for flexible deployments
PERFORMANCE:
Data Rate: Up to ~44.736 Mb/s per port for T3, ~34.368 Mb/s per port for E3
Power Consumption: Maximum ~8.4 W for the 4‑port module
ENVIRONMENTAL & RELIABILITY:
Operating Temperature: 5 °C to 40 °C (41 °F to 104 °F)
Storage Temperature: –40 °C to 70 °C (–40 °F to 158 °F)
Operating Humidity: 5% to 85% RH; Storage Humidity: up to 95% RH
Designed for carrier‑grade WAN access and network termination applications
PHYSICAL:
Form Factor: Plug‑in SPA module for compatible Cisco routers supporting SPA interface slots
Typical Dimensions: Height ~0.8 in (2.03 cm), Width ~6.75 in (17.15 cm), Depth ~7.28 in (18.49 cm)
Weight: ~0.75 lb (~0.34 kg)
COMPATIBILITY & NOTES:
Compatible with Cisco modular routers that support SPA architecture (e.g., Cisco ASR 9000 Series, Cisco 7600 Series)
Each port can be configured as either T3 or E3 (not a mix of both on the same module)
Requires appropriate cabling and external timing clocks depending on service provider environment
Ideal for service provider or enterprise networks requiring high‑density T3/E3 connectivity
Because this is often a refurbished module: verify condition, firmware compatibility, and slot support in your chassis

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