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Coherent ELS

Delivering high-capacity coherent DWDM to the edge

ELS 10 and 48ch 2000x500

Ciena’s Coherent ELS is a coherent-optimized Open Line System (OLS) designed to meet next-generation photonic requirements at the network edge. ELS cost-effectively delivers 100G to 400G coherent DWDM, enabling a full system capacity of up to 19.2 Tb/s, with a minimal footprint and unprecedented operational simplicity.

Coherent ELS features and benefits

Coherent-optimized OLS

Delivers 100G to 400G coherent DWDM to the edge in a compact, hardened form factor across flexible configurations, including 400ZR and 400G performance pluggable applications.

Fast high-scale deployments

Eases deployments with a stackable plug-and-play design, automatic turn-up, and Zero Touch Provisioning (ZTP) along with flexible AC or DC powering to address specific site requirements.

ROADM-like operational simplicity

Provides integrated system intelligence and automation for faster service turn-up, troubleshooting, and real-time system optimization with a range of easy-to-manage options.

Unprecedented operational simplicity

A key differentiation of Ciena’s Coherent ELS is the built-in software intelligence and automation that facilitates deployments, accelerates turn-up, and optimizes system performance—enabling a new operational paradigm for photonics at the network edge.


  • +Physical Dimensions
    • 48-Channel Terminal (2RU):
      • 88 mm (H) x 438 mm (W) x 280 mm (D)
      • 3.46 in. (H) x 17.25 in. (W) x 11.03 in. (D)
    • 6-Channel OADM (1RU):
      • 44 mm (H) x 438 mm (W) x 280 mm (D)
      • 1.71 in. (H) x 17.25 in. (W) x 11.03 in. (D)
    • 10-Channel OADM (1RU):
      • 44 mm (H) x 438 mm (W) x 280 mm (D)
      • 1.71 in. (H) x 17.25 in. (W) x 11.03 in. (D)
  • +Weights
    • 48-Channel Terminal
      • DC: 6.9 kg (15.2 lb.)
      • AC: 7.2 kg (15.9 lb.)
    • 6-Channel OADM
      • DC: 5.4 kg (11.9 lb.)
      • AC: 5.7 kg (12.6 lb.)
    • 10-Channel OADM
      • DC: 5.4 kg (11.9 lb.)
      • AC: 5.7 kg (12.6 lb.)
  • +Capacity
    • System: Up to 19.2 Tb/s
    • WDM: 100G to 400G coherent DWDM
  • +Photonics and Embedded Instrumentation
    • 100 GHz fixed-grid line system
    • Integrated bi-directional EDFA amplifiers, up to 30dB span losses
    • Integrated power monitoring and control
    • Integrated bi-directional Optical Service Channel (OSC) (1511 nm)
  • +Common equipment
    • Dual feed AC or DC power supplies
    • Field-replaceable fan module
  • +Power options
    • AC or DC power
    • Operational AC input voltage range: 100 Vac to 240 Vac
    • Operational DC input voltage range: -40 Vdc to -75 Vdc
  • +Environmental Characteristics
    • OADM Extended temperature: -40°C to 65°C (-40°F to 149°F)
    • Terminal Normal operating temperature: 5 °C to 40 °C (41 °F to 104 °F)
    • Normal operating humidity: 5% to 85% RH
    • Operational altitude: -61 m to 1829 m at 40°C (-200 ft to 6,000 ft) and from 1829 m to 3960 m at 30°C (6,000 ft to 13,000 ft)
    • Earthquake/Seismic: Zone 4
  • +Management
    • CLI, GUI, Ciena’s MCP, SNMP
    • Zero Touch Provisioning (ZTP)

Ciena Services is here to help

Ciena Services partners with you to plan, design, and implement your Coherent ELS network, ensuring that you get the most from your Ciena investment as quickly as possible. We provide the right training through our learning courses, and help you achieve rapid high-scale ELS deployments through an extensive network of professionals.

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