8F MTP loopback modular

Type: 8-Fiber MTP loopback modular, an optical testing component
Function: Routes TX signals to RX channels for transceiver, port and link testing
Optical: 8 fibers (MM/SM optional), compatible with common wavelengths
Mechanical: Compact, PC housing, easy to mate/unmate with dust cap
Environment: -40°C to +80°C operating temp, RoHS compliant
Applications: Transceiver testing, network troubleshooting, data center commissioning

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Product Description
Specification
Product Advantage

Product Description

1. Scope

This document specifies the technical requirements, performance parameters, mechanical characteristics, environmental specifications, and application scenarios of the 8-Fiber (8F) MTP Loopback Modular. The product is designed for testing and verifying optical transceivers, network ports, and cabling systems in high-density data center and telecommunication environments. All specifications apply to standard commercial-grade modules without proprietary branding, part numbers, or manufacturer identifiers.

2. Product Description

The 8F MTP Loopback Modular is a compact optical testing component that routes transmit (TX) optical signals back to corresponding receive (RX) channels within a single MTP connector interface. It enables self-testing of 40G/100G QSFP+ transceivers, port validation, insertion loss (IL) measurement, and link troubleshooting for parallel optics networks. The module integrates internal fiber routing and a protective housing for stable, repeatable testing.

Specification

3. Optical Performance Specifications

3.1 Fiber Type & Configuration

• Fiber Count: 8 fibers (8F)

• Fiber Category:

￮ Multimode (MM): OM2 (50/125 μm), OM3 (50/125 μm), OM4 (50/125 μm)

￮ Single-mode (SM): OS1 (9/125 μm, G652D), OS2 (9/125 μm, G657A1/A2)

• Connector Type: MTP (male/female optional; with/without guide pins optional)

• Polishing: PC (Physical Contact); APC (Angled Physical Contact, 8°) optional

• Polarity: Standard Type-A (straight-through) for TX-RX loop mapping

3.2 Insertion Loss (IL)

• Multimode (OM2/OM3/OM4): ≤ 1.2 dB (typical ≤ 0.8 dB)

• Single-mode (G652D): ≤ 1.5 dB (typical ≤ 1.0 dB)

• Single-mode (G657A1/A2): ≤ 0.75 dB (typical ≤ 0.5 dB)

3.3 Return Loss (RL)

• Multimode: ≥ 25 dB

• Single-mode (PC): ≥ 55 dB

• Single-mode (APC): ≥ 60 dB

3.4 Wavelength Compatibility

• Multimode: 850 nm (VCSEL), 1300 nm

• Single-mode: 1310 nm, 1550 nm

4. Mechanical Specifications

4.1 Dimensions

• Length × Width: 60 mm × 20 mm (standard)

• Housing Material: High-strength PC (Polycarbonate) composite

• Weight: ≤ 15 g

4.2 Durability & Reliability

• Mating Durability: ≥ 500 insertion/extraction cycles; IL variation ≤ 0.5 dB after cycling

• Tensile Strength: Withstands ≥ 15 kgf (axial pull) without performance degradation

• Cable Retention: Internal fiber secured with strain relief; no failure under 5 kg pull

4.3 Physical Features

• Push-pull tab for easy mating/unmating

• Integrated dust cap for connector protection

• Compact form factor for high-density panel testing

• Color-coded housing (MM: aqua/beige; SM: blue/green)

5. Environmental Specifications

• Operating Temperature: -40°C to +80°C

• Storage Temperature: -45°C to +85°C

• Humidity: 5% – 95% (non-condensing)

• Vibration: MIL-STD-810F compliant (no performance shift)

• RoHS Compliant: Lead-free, halogen-free optional

6. Application Scenarios

• Transceiver Testing: 40GBASE-SR4, 100GBASE-SR4 QSFP+ transmit/receive verification

• Network Troubleshooting: Port isolation, signal loopback, continuity testing

• Cabling System Validation: MTP trunk/patch cord insertion loss measurement

• Data Center Commissioning: Pre-deployment port and link qualification

• Equipment Burn-In: Accelerated stress testing of optical interfaces

7. Compliance & Standards

• Telcordia GR-326-CORE (optical connectors)

• IEC 61754-7 (MTP/MPO connector standards)

• RoHS 2011/65/EU

• IEEE 802.3 (40G/100G Ethernet compliance)

8. Ordering Information (Generic)

• Configuration: 8F MTP Loopback Modular

• Connector Gender: Male / Female

• Fiber Type: MM (OM2/OM3/OM4) / SM (OS1/OS2)

• Polish: PC / APC

• Housing Color: Custom (per fiber type)

Product Advantage

1

High compatibility: Compatible with multimode (MM) and single-mode (SM) fibers, and common optical wavelengths.
2

Compact & portable: Small size and light weight, ideal for high-density testing environments.
3

Easy to operate: Push-pull tab for easy mating/unmating, with dust cap for connector protection.
4

Stable & reliable: Complies with standard IL and RL specs, ensuring accurate testing results.
5

Strong environmental adaptability: Stable operation at -40°C to +80°C, RoHS compliant and anti-vibration.
6

Versatile use: Applicable to transceiver testing, network troubleshooting and data center commissioning.