We will be closed for the Holidays from December 24, 2025 until January 5, 2026. Orders placed during this time may not ship until the second week of January.

Easily transfer data with the

F-FS4105 FarSync BERT Tester-USB Flex with Bit Error Rate Test (BERT) line quality tester software + cables

Farsite FS4105

USB BERT (Bit Error Rate Test) line quality tester for Synchronous and Asynchronous lines with X.21, RS232, V.35, RS422, RS485 (4 wire), RS530 or RS449 network interfaces. Maximum synchronous test speed 2 MBits/s.


Product Includes:

  • FarSync Flex BERT - USB adapter
  • BERT Tester software for Windows
  • KCR1-V2 - RS232, RS422 and RS530 DTE connection (DB25M) cable
  • UCX1 - X.21 connection DTE (DB15M) cable
  • TEST-T2U - Loopback connector for self test
  • Line Monitor software
  • API documentation

SKU: F-FS4105
$1,162.00
Shipping calculated at checkout.