
Why buy from us?
HardwareJet is built for professionals who need dependable hardware without delays or guesswork. Our curated network of manufacturers ensures quality parts, fair pricing, and responsive service.
Ask a Question About This Product
- In Stock: 2
- Manufacturer: Paradyne
- Model or Part: 7520-A1-201
- Condition: Refurbished
- Weight: 15.00lb
United States Shipping
Orders over $200 qualify for Free Super-Saver Shipping! We ship at our discretion via the most cost-effective method using FedEx, UPS, or USPS.To ensure your order is processed efficiently, all shipping charges must be pre-paid at checkout. We are unable to bill directly to third-party shipper accounts or use customer-provided labels for domestic shipments.
International Shipping
International orders begin processing as soon as payment is confirmed.- Pre-paid Shipping: For your convenience, you can select and pay for international shipping directly at checkout.
- Carrier Accounts: Alternatively, we can bill transport costs directly to your FedEx account number. (Note: We cannot bill to DHL, TNT, or UPS accounts).
- Customer Labels: We are also happy to ship internationally using pre-paid labels provided by you for any carrier.
Expedited and Rush Shipping
Need it faster? HardwareJet.com offers 1 or 2-day expedited shipping options during checkout for eligible items.To get your order to the front of the line, expedited orders include a small rush fee in addition to the carrier's shipping charges. If an item is not available for expedited shipping, these options will not appear in your cart.
Item Condition
New - Sealed or Open Box ConditionExcellent - Almost-New, Missing Original Packaging
Refurbished - Seller Refurbished, Good Condition, Previously Used Item
To bring you an even wider selection, some of our items are shipped directly from our trusted partners. Delivery times may vary for these items.
Overview
The Paradyne 7520 DSU No Power Supply 56/64K (part number 7520-A1-201) is a high-performance data service unit designed for reliable digital transmission over T1/E1 and DS3 circuits. This unit provides robust error detection, flexible framing options, and advanced line conditioning without the need for an internal power supply, making it ideal for rack mounting alongside external power solutions.
Key Features
- Supports both 56 Kbps and 64 Kbps data rates for versatile network configurations
- Built-in line equalization and jitter attenuation to maintain signal integrity
- Multiple framing formats including D4, ESF, and CRC4 for compatibility with legacy and modern systems
- External power supply design reduces heat generation inside the chassis
- Diagnostic LEDs and status registers for quick troubleshooting
- Compact 1U rack footprint saves valuable data center space
Technical Specifications
- Model: 7520-A1-201
- Manufacturer: Paradyne
- Data rates: 56 Kbps, 64 Kbps
- Interface: T1/E1 (DS0) and DS3
- Input voltage: 48 VDC (external supply)
- Operating temperature: 0 deg to 55 deg C
- Humidity: 10 to 90 percent noncondensing
- Power consumption: less than 5 W (external supply)
- Dimensions: 1.75 in height, 19 in rack width, 12 in depth
Applications
This DSU is suited for a wide range of telecommunications and data networking environments, including:
- Enterprise WAN links requiring reliable T1/E1 connectivity
- Carrier grade backhaul for voice and data services
- Industrial control systems that depend on stable serial communication
- Government and military installations where rugged, low power equipment is essential
- Remote sites that use external power solutions for redundancy and flexibility
By integrating the Paradyne 7520 DSU into your network, you gain a dependable, low-maintenance solution that enhances data transmission quality while simplifying power management.