8/12/24-Fiber MTP/MPO loopback modules
MTP/MPO loopback modules are used widely within testing environment especially within parallel optics 40G networks. Devices allow verification and testing of transceivers featuring MTP interface – 40GBASE-SR4/CSR4 QSFP+ devices. Loopbacks are built to link Transmitter (TX) and Receivers (RX) positions of MTP transceivers interfaces. MTP loopbacks can facilitate and speed up IL testing of optical networks segments by connecting them to MTP trunks/patch leads.
Product Details
Fiber Type | SM/MM | Fiber connrctor | MTP/MPO |
Return loss | SM>50dB,MM>35dB | Insertion loss | <1.0dB |
Insert-pull test | 50times, IL<0.5dB | Size | 80mm*10mm |
Operation temperature | -40 to 75°C (-40 to 167°F) | HTS-Harmonized Code | 8517709000 |
Quality Certification

Product Details

Standard ConnectorMTP loopback connector adopts 8/12/24 fibers with different types of polarity. | ![]() |
![]() | Upgrade DesignThe fiber loopback is slim and takes up less space than tranditional fiber loopback. |
Dustproof FunctionEvery loopback module is equipped with a dust cap, which is convenient to protect it from pollution. | ![]() |
FOCC provides type 1 polarity loopback modules as default for your networks.
And please note that 8/12 fibers MTP is for 40G QSFP+/100G QSFP28, 24 fibers is for 100G CFP/CXP.

Tom –
8/12/24-Fiber MTP/MPO loopback modules
Riley (verified owner) –
Good quality.
Matthew (verified owner) –
Good quality.
Kai (verified owner) –
Good quality.
Paul (verified owner) –
The product is firmly packed.
Edward (verified owner) –
Good quality.
Liam (verified owner) –
Very fast delivery.
Mason (verified owner) –
Very fast delivery.
Leo (verified owner) –
The product is firmly packed.
David (verified owner) –
Very fast delivery.
Ryan (verified owner) –
The product is firmly packed.
Tyler (verified owner) –
The product is firmly packed.
Ryan (verified owner) –
Very well worth the money.
Kevin (verified owner) –
Very well worth the money.
Richard (verified owner) –
Good service.
Kayden (verified owner) –
Very fast delivery.
Lucas (verified owner) –
Very fast delivery.