16 Fibers MMC Female Type 1 Fiber Loopback Module, OS2

The LPM-SM-16MMC is a 16-fiber OS2 loopback with an MMC female APC interface and Type 1 fiber mapping. It returns transmitted optical lanes to the receive side for port testing and burn-in. The assembly uses G.657.A2 fiber in a 2.5mm plenum cable, with a 100mm loop and 250mm overall length for convenient handling in laboratory and field diagnostics.

Product Highlights

• Fiber Type: OS2 9/125µm
• Fiber Connector: MMC Female, APC
• Glass Fiber: G.657.A2
• Cable Jacket: Plenum (OFNP)
• Fiber Count: 16 Fibers
• Fiber Mapping: Type 1

The loopback's internal wiring determines which transmit lanes return to which receive lanes. Type 1 must match the equipment test plan; selecting a module by connector shape alone is not sufficient. The female MMC interface requires the appropriate pinned mate, and APC polish must be consistent with the port being tested.

Maximum insertion loss is 0.7dB and minimum return loss is 60dB. The loopback adds passive attenuation to the test path, so review transmitter power and receiver thresholds before interpreting results. It can help isolate port behavior and support burn-in, but it does not validate the loss, polarity or end-face condition of the external cabling channel.

The 100mm loop has a +0/-25mm tolerance and the 250mm overall length has a +50/-0mm tolerance. Mating durability is specified at 50 cycles. Avoid tight bends below the 7.5mm optical-fiber minimum, inspect the MMC ferrule before each use and store the module dust-capped between test sessions.

Request LPM-SM-16MMC for the 16-fiber OS2 Type 1 configuration. State quantity and any identification labels required for a test kit; if your procedure uses a different mapping or fiber mode, confirm that requirement before ordering.