en

Products

Field network testing

New Featured Optical Xplorer™ - industry's first optical fiber multimeter

Lab and manufacturing testing

MOA-3800 - variable optical attenuator

Monitoring and assurance

Featured EXFO Verifier Agent (EVA) - Network visibility solution

Solutions

Communications service providers

Contractors

Academic and research institutions

Cable MSO (multiple system operator)

Network equipment manufacturers

Webscale companies and data centers

Government

Services

Training

Featured Introduction to testing with OTDRs

Field network testing

Brochures and catalogs Be-an-Expert Training Catalog

Lab and manufacturing testing

Brochures and catalogs Be-an-Expert Training Catalog

Monitoring and assurance

Brochures and catalogs EXFO Astellia Training Courses

Resources

Technical documentation

Promotional documentation

Legal documentation

Blog

How to test MPO connectors for top performance By Guillaume Lavallée | July 2019
Collaboration, culture and people: the keys to unlocking intelligent operations in a 5G world By Jo Hicks | July 2019
5G in the rain, 5G in the sun… By Dr. Konstantinos Stavropoulos | July 2019
View all

Webinars

Alternate Text

Register now

Christian Till | September 25, 2019 - 4 PM GMT + 1

FTTH Webinar Series : FTTH 101 - Back to basics - Part 1 (Webinar in German)

Alternate Text

Register now

Yvon Rouault | October 1, 2019 - 8 am San Francisco / 11 am New York / 4 pm London

The 5G revolution: fixed wireless, broadband, and the home network

Alternate Text

Jimmy Gagnon | September 19, 2019

Flexible Design Choices With 10G Passive Optical LANs

View all

Glossary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

Videos

Success stories

EXFO and Zain unlock the value of network data to boost CX and revenues

Alternate Text

Hawaiki ushers in a new era of digital communications in the Pacific

Alternate Text

Certifying 5G equipment vendors

View all

Transformations

To add favorites to a list, you must be logged in to your account.

Login Register

Corporate
Investors
Careers
Partners
Suppliers
Products
Field network testing
Lab and manufacturing testing
Monitoring and assurance
Solutions
Communications service providers
Wireline
Wireless
Service assurance
Contractors
Managed services, installation and maintenance
Academic and research institutions
Cable MSO (multiple system operator)
Wireline
Service assurance
Network equipment manufacturers
Physical layer and network protocol testing
Wireless lab emulation and testing
Webscale companies and data centers
Physical layer and network protocol testing
Network optimization
Government
Support
Services
Training
Field network testing
Lab and manufacturing testing
Monitoring and assurance
How to buy
Resources
Technical documentation
Promotional documentation
Legal documentation
Videos
Transformations
Contact
English

Glossary

Technology evolves at a rapid-fire pace. That’s why we’ve built an easy-to-use glossary to help you better understand the terms, technologies and trends that impact your business.

Half-Duplex

Return to glossary

Data transmission over a circuit capable of transmitting in either direction, but not simultaneously. For Ethernet, the CSMA/CD method is a half-duplex protocol.