4 Channel 25G Ready Industrial class LAN-WDM Junction Box

# Key Highlights
  • Split 100G LWDM to 4x25G
  • 4 LWDM Data services over Double SMF
  • Connect to 100G-QSFP28-10 or 100G-QSFP28-40
  • IP65 Water, Dust resistant
  • Outdoor ODVA Dual LC connectors
  • Telecom Pole or Wall installation
  • Small size and light weight
  • Low Insertion Loss: ≤ 2.2 dB
  • TFF with band skip filters
  • Industrial Temperature: -45°C – +85°C
  • Fully passive (No Power Supply or Cooling)
  • Zero configuration or maintenance
  • Protocol & Data Rate neutral
  • MTBF: 100+ Years
  • 5 Year Warranty
# Pricing & Ordering


Standard recommended retail price without VAT.

Lead Time: 4-6 Weeks in EU Countries
# Quality Assurance

Because of our comprehensive Testing Program, we are confident on quality of our products. Such approach empower us to cover all our products with:

# Front Panel


# Key Technical Data
Product Type:

Number of Data Streams:

Number of Optical Channels:

Operating Wavelengths:

, , ,

Filter Technology:


Channel Spacing:

Insertation Loss (Passband):

Isolation Adjacent Channels:

Isolation Non-Adjacent Channels:

Channel Pass-band Ripple:

Insertion Loss Temperature:

<0.003 dB/ (°C)

Wavelength Temperature Shifting:

<0.002 nm/ (°C)

Polarization Dependent Loss (PDL):

Polarization Mode Dispersion (PMD):


Return Loss:

Maximum Power Handling:


Operating Temperature:

Storage Temperature:

Protection Class:

IP65 – Water, Dust resistant


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# Product Documentation
# Product Description

  DLMD-4I is an 100G QSFP28 to 4x25G SFP28 Optical Junction Box and is part of our Industrial Passive xWDM filter series. Unit supports LAN-WDM 1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm wavelength according to 100G LR4/ER4 grid. Depending on the distance DLMD-4I is connected to 100G-QSFP28-10 or 100G-QSFP28-40. DLMD-4I unit is for harsh outdoor environments supporting IP65 water, dust resistance, -40 to 85C industrial temperature, telecom pole or wall installation options and comes with ODVA double LC connectors for easy fiber connection. Unit is small in size, light in weight, is simple to install, requires zero configuration or maintenance and is fully passive – no power supply or cooling required. DLMD-4I uses LWDM TFF (thin-film filters) with band skip filters to achieve ≤2.2 dB insertion loss.

    xWDM filters are data rate or line protocol neutral and are used in combination with colored optical transceivers which ensure desired application and data rate. Typical use case for DLMD-4I filters are 5G/4G Mobile Fronthaul Network Baseband Unit (BBU) and Remote Radio Head (RRH) interconnection (CPRI/eCPRI protocol), Enterprise Network 100G to 4x25G Ethernet links or Datacenter Fiber Channel connections. For further information you are welcome to Contact Us!