EXFO has introduced a new DWDM OTDR to test through field mux/demux channels using the customer's wavelength in 
order to troubleshoot faulty links or deliver first-time-right deployments during service construction into a business location or a wholesale wireless site. The FTBx-740C-DWC unit is a tunable OTDR in the C-band, and covers channel spacing of 100 GHz/50 GHz based on the ITU-T standard grid. It also features a high dynamic range for improved performance and the long reach needed to cover metro/long-haul applications.
What drove the testing equipment vendor to release this new product is the growth in retail business and wholesale services like fiber-to-the-building (FTTB)/fiber-to-the-premises (FTTP) and cellular‑backhaul (CBH) deployments evolving and migrating from CWDM to DWDM. EXFO said its tunable DWDM OTDR allows technicians to perform in-service tests from the head-end right up to the customer's premise while easily locating problems and preventing costly SLA penalties and maintenance downtime periods. Unlike traditional light source and OSA approach that requires two technicians and synchronization, this single-ended OTDR test solution enables one technician to quickly respond to network failures. In addition, this technology complements the existing test procedures currently used for CWDM deployments. Release