What is a 1X9 optical transceiver used for?

1X9 transceivers are legacy modules used in OC-3, OC-12, and Fast Ethernet applications. They offer simple SC/ST connectivity and are ideal for maintaining older infrastructure.

What is the difference between SFF and SFP modules?

SFF (Small Form Factor) transceivers are bulkier than SFPs and typically require internal mounting, while SFPs are hot-swappable and more compact, replacing SFF in modern systems.

Can LINK-PP provide customized 1X9 or SFF transceivers?

Yes. LINK-PP offers legacy fiber transceivers with custom pinout, connector type, and wavelength options tailored for industrial and telecom retrofits.

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1X9/SFF Transceiver Modules

L9-SD311G-10CTC 1.25Gbps Dual SC 1310nm 10km 1×9 SMF Optical Transceiver

L9-SD311G-20CTC 1.25Gbps Dual SC 1310nm 20km 1×9 SMF Optical Transceiver

LINK-PP

1X9 Optical Transceiver

L9-SD311G-20CTC

L9-SD311G-20CTC 1.25Gbps Dual SC 1310nm 20km 1×9 SMF Optical Transceiver

L9-SD311G-20PPC 1.25Gbps 1310nm 20km 3.3V Single-Mode Dual SC 1×9 Optical Transceiver

LINK-PP

1X9 Optical Transceiver

L9-SD311G-20PPC

L9-SD311G-20PPC 1.25Gbps 1310nm 20km 3.3V Single-Mode Dual SC 1×9 Optical Transceiver

L9-SD311G-20PTC 1.25Gbps 1310nm 20km 3.3V Single-Mode Dual SC 1×9 Optical Transceiver

LINK-PP

1X9 Optical Transceiver

L9-SD311G-20PTC

L9-SD311G-20PTC 1.25Gbps 1310nm 20km 3.3V Single-Mode Dual SC 1×9 Optical Transceiver

Siemens

SFF Optical Transceiver

LF5-SM5501-A0AC

C53207-A351-D657-1 Compatible LF5-SM5501-A0AC 155M 2x5 SFF Optical Transceiver Module

LINK-PP

SFF Optical Transceiver

LF5-SM5501-A0AC

LF5-SM5501-A0AC 155M 2x5 SFF Optical Transceiver Module

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Legacy Optical Transceivers for SONET, SDH, and Fast Ethernet Applications

LINK-PP continues to support industrial and telecom customers with reliable 1X9 and SFF optical transceivers. These legacy modules are essential for maintaining older systems operating over Fast Ethernet, OC-3, OC-12, or SDH/SONET protocols.

Available in multi-mode and single-mode variants, 1X9 modules support SC or ST connectors and deliver performance at 1310nm or 1550nm wavelengths. SFF transceivers offer compact form factors for space-constrained environments while maintaining robust optical performance and electrical interface stability.

For equipment retrofit, long-term spare parts planning, or telco infrastructure lifecycle extension, LINK-PP ensures continuous availability, customized pinouts, and full MSA compliance for your legacy fiber systems.

📘Frequently Asked Questions about 1X9 / SFF Optical Transceivers

Q: What is a 1X9 optical transceiver used for?
A: 1X9 transceivers are legacy modules used in OC-3, OC-12, and Fast Ethernet applications. They offer simple SC/ST connectivity and are ideal for maintaining older infrastructure.
Q: What is the difference between SFF and SFP modules?
A: SFF (Small Form Factor) transceivers are bulkier than SFPs and typically require internal mounting, while SFPs are hot-swappable and more compact, replacing SFF in modern systems.
Can LINK-PP provide customized 1X9 or SFF transceivers?
A: Yes. LINK-PP offers legacy fiber transceivers with custom pinout, connector type, and wavelength options tailored for industrial and telecom retrofits.