For Nigerian deployments, this product should be evaluated as part of the complete network path, including its connectors, mapping and acceptance values. The LPM-SM-16MMC is a 16-fiber OS2 loopback with an MMC female APC interface and Type 1 fiber allocation. It returns transmitted optical lanes to the receive side for port testing and burn-in. The completed product uses G.657.A2 fiber in a 2.5mm plenum cable, with a 100mm loop and 250mm complete 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
Specifications
| Part Number | LPM-SM-16MMC |
|---|---|
| Manufacturer | HT |
| 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 |
| Insertion loss | ≤0.7dB |
| Return Loss | ≥60dB |
| Cable Outside Diameter (OD) | 2.5mm |
| Mating Durability | 50 cycles |
| Loop Length | 100mm (+0/-25mm) |
| Overall Length | 250mm (+50/-0mm) |
| Min. Bend Radius (Optical Fiber) | 7.5mm |
| Min. Bend Radius (Fiber Cable) | 20/10D (Dynamic/Static) |
| Operation temperature | 0 to 60°C (32 to 140°F) |
| Storage Temperature | -20 to 75°C (-4 to 167°F) |
Type 1 mapping for sixteen-fiber tests
The loopback’s internal wiring determines which transmit lanes return to which receive lanes. Type 1 must correspond to the network equipment test plan; selecting a module by connector shape alone cannot be considered sufficient. The female MMC interface requires the correct pinned mate, and APC polish must be consistent with the port being tested.
Optical values to consider during diagnosis
Maximum insertion loss is 0.7dB and minimum return loss is 60dB. The loopback adds passive attenuation to the test path, which means check transmitter power and receiver thresholds before interpreting results. It might help isolate port behavior and support burn-in, but it does not itself validate the loss, polarity or end-face condition of the external cabling channel.
Handling a short precision assembly
The 100mm loop has a +0/-25mm tolerance and the 250mm complete 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 every use and store the test module dust-capped between test sessions.
Ordering and Factory Support
Request LPM-SM-16MMC for the 16-fiber OS2 Type 1 configuration. State quantity and any identification labels needed for a test kit; if your procedure uses a different allocation or fiber mode, establish that requirement before requesting production. For Nigerian orders, our team can check the requirement before coordinating manufacture and international delivery.
