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PM OTDR

Optical Time Domain Reflectometer

PM OTDR

Pluggable optical time domain reflectometer module. Supports one or two fibers independently. Used to detect signal failures up to 80 Km from the node. Operates at 1610nm.

The ability to quickly identify and isolate network outages is critical function for any network operator. Without it, operators not only have to explain to their customers why the outage occurred, they also must compensate them for any period of service unavailability in excess of their Service Level Agreement (SLA). In an industry where Average Revenue per User (ARPU) is used as a key metric for evaluating an operator’s financial health, the ability to avoid SLA penalties has measurable impact onthe bottom line.

With the EKINOPS PM OTDR module, network operators have the ability to determine the fault location based on the reflection point of the OTDR signal. Depending on the Optical Return Loss (ORL) induced by the fiber defect, up to 65 dB round trip loss can be detected, corresponding to typically 40 kms from the terminal.

Table Fiber Fault
Figure 1: Fiber fault detection from one end / randomly distributed fault

This ability allows them to dispatch technicians to the correct location saving the time and effort normally associated with locating faults such as fiber cuts. The EKINOPS PM OTDR can be deployed in multiple configurations — per-span, per-cable or long span. In a per-span application, a PM OTDR is deployed at the beginning of each span allowing each fiber — East and West — to be monitored individually:

Sch1 PM OTDR
Figure 2: EKINOPS PM OTDR per-span monitoring

In a per-cable configuration, a single PM OTDR module can be used to monitor two spans on a fiberpair in the same cable:

Sch2 PM OTDR
Figure 3: EKINOPS PM OTDR per-cable monitoring

In long span applications, deploying a PM OTDR on each end provides fault detection and isolation at distances up to 80 kms, eliminating the need for mid-span access at an intermediate point without sacrificing network visibility:

Sch3 PM OTDR
Figure 4: EKINOPS PM OTDR long span monitoring
  • Quickly identifies fiber cut locations
  • Dual span monitoring from a single card
  • Extreme receiver sensitivityfor instantaneous fault detection
  • Pluggable OTDR SFP
  • WDM filters for easy insertionto existing line system
  • Remotely manageable from the NOC
  • Remote fault detection and isolation
  • Fiber level fault monitoring
  • Span level fault monitoring
  • Long span monitoring

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