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Coherent ELS

Delivering scale and high-capacity coherent DWDM to the edge in a compact, hardened form factor with unprecedented operational simplicity

ELS 10 and 48ch 2000x500

With Ciena’s Coherent ELS, network providers can benefit from a coherent-optimized open line system (OLS) that is purpose-built to fully address next-generation edge network requirements today and moving forward. The ELS cost-effectively delivers 100G to 400G coherent DWDM wavelengths to the edge, enabling a full system capacity of up to 48 channels for point-to-point applications or up to 42 channels for linear and hub/spoke applications.

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

Features and benefits

No. 1

Efficiently scales to meet high-capacity requirements at the network edge with minimal footprint and automated deployments

No. 2

Delivers 100G to 400G coherent DWDM across flexible configurations, including 400ZR and 400ZR+ applications

No. 3

Eases deployment with stackable plug-and-play design, automatic turn-up, and Zero Touch Provisioning (ZTP)

No. 4

Offers ROADM-like operational simplicity with integrated automation and intelligence for faster service turn-up, troubleshooting, and real-time system optimization

No. 5

Leverages AC and DC powering options with support for extended temperature deployments to address specific site requirements

No. 6

Provides carrier-grade 99.999% availability in central office (CO) and Outside Plant (OSP2) environments


  • +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)

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