Digital Transmission Analyzers

Fast and accurate network transmission tester

60s Snapshot

Portable Modular Transmission Tester

D240S

Supports STM-16/OC-48 high-speed transmission testing

D300S

Supports full-featured testing of SDH/PDH/Ethernet/PTN

D450S

Find the Right Tester for You

Items/Models	D240S	D300S	D450S
Support Rate	155 M	2.5 G	10 G
STM-16/0C-48			√
STM-4/0C-12		√	√
STM-1/0C-3	√	√	√
STM-1/0C-3 Electrical Interface	√	√	√
E1/E2/E3/E4	√	√	√

How TFN Simplifies Network Transmission Testing

The TFN D-Series SDH/SONET Transmission Analyzers are multi-service testing solution for SDH/SONET, PDH/DSn, Ethernet, and PTN networks.
It covers 1.5 Mbps to 10 Gbps (STM64/OC192) and offers advanced features like overhead editing, pointer sequence testing, APS protection switching, and TCM cascade monitoring — giving engineers complete visibility of transmission quality and network performance.

What It Solves

Ensures signal integrity and transmission reliability.
Quickly locates and simulates faults without interrupting live traffic.
Simplifies operation and maintenance for backbone and metro networks.

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FAQs

What’s the delivery time?

Delivery time depends on the complexity of the product and the current order status.

Standard models are usually in stock and can be shipped within 3-7 business days after receiving payment.

Custom/high-configuration models may require 2-6 weeks for production and testing.

The exact delivery time will be confirmed in writing by your sales manager after you place your order.

Is there a minimum order quantity for your product?

To ensure production efficiency and provide the most competitive pricing for our customers, we typically have a minimum order quantity for our standard products.

For most communication test instruments, the minimum order quantity is 1 unit.

For supporting tools and accessories, higher minimum order quantities may apply.

If you have special requirements, please contact our sales team directly to discuss.

What is the product warranty period?

We are confident in the quality and reliability of our products.

We offer a standard 12-month warranty on all instruments, starting from the date of arrival at the port of destination.

This warranty covers failures due to defects in materials or workmanship. It does not cover damage caused by misuse, accidents, unauthorized modifications, or use not in accordance with the operating instructions.

Extended warranties are also available; please contact our sales team for details.