here!
I’m your shopping assistant for PC builds, upgrades, and everything tech.
Got questions? Ask away!
Start a conversation
Best Sellers
StarTech MPO Loopback Plug Single Mode 9/125 MPO-12 Male Fiber Loopback Adapter MPO/MTP Male Loopback Tester LOOPBACKMTP12OS2SMM
+
+
Single Mode MPO Loopback Plug
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 2 years
- Limited Warranty period (labor): 2 years
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.com's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
Manufacturer Contact Info
- Manufacturer Website
- Support Phone: 1-800-265-1844
- Support Email: support@startech.com
- Support Website
- View other products from STARTECH
LOADING...
LOADING...
The StarTech LOOPBACKMTP12OS2SMM is a single-mode 9/125 MPO-12 male loopback adapter for checking signal continuity on MPO/MTP fiber connections, suited to network technicians and IT professionals testing compatible female ports or transceivers.
Recommended For
- Fiber technicians checking a single-mode MPO-12 port can use this loopback to return the port’s transmit signal to its receive side for a local functional test. It is intended for a compatible female MPO/MTP port.
- Data-center and telecom teams testing compatible QSFP or other parallel-optics equipment can use it to check local transceiver or port operation without a second device as the link partner.
- Network-equipment labs and production teams performing burn-in or repeatable component checks can use an MPO loopback as a compact test connection for compatible single-mode MPO components.
- Technicians isolating a suspected local port or transceiver fault can use it as one step in troubleshooting; a successful local loopback does not test the full installed cable route.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Loopback testing and signal verification on single-mode MPO/MTP patch panels and transceivers |
| Connector And Fiber | 12-pin single-mode MPO/MTP male loopback plug; connector gender is listed as male-to-female |
| Standards And Use Environment | Meets IEC specifications and is intended for indoor use |
| Physical Specifications | 5.1 × 0.5 × 0.4 in; 0.01 lb; black and green, with a compact form factor |
| Package Contents | One MTP/MPO fiber loopback plug |
| Model Identifiers | LOOPBACKMTP12OS2SMM |