Altronix P1B2K Single-Strand Single-Mode SFP Transceiver
Overview
The Altronix P1B2K is a single-strand, single-mode SFP transceiver engineered to pair with the Altronix P1A2K fiber transmission platform. Where standard copper video or data runs hit their limits, the P1B2K extends your link up to 2km (6,561 ft.) over a single strand of single-mode fiber — half the fiber infrastructure of a conventional two-strand run. If you're designing long-run fiber optic transmission segments for perimeter surveillance, campus distribution, or inter-building backbone links, this transceiver is the component that makes those runs viable without pulling additional fiber plant.
Built to the SFP Multi-Source Agreement (MSA) standard, the P1B2K slots into any MSA-compliant SFP cage, keeping your deployment options open rather than locking you into proprietary hardware. Browse the full Altronix transmission and power line for compatible shelf hardware and accessories.
Key Features
- Up to 2km (6,561 ft.) reach: A single P1B2K covers runs that would require a mid-span repeater or additional copper infrastructure — meaningful on perimeter loops around large industrial sites, parking structures, or multi-building campuses where fiber is already in the conduit.
- Bi-Directional single-strand design: Transmit and receive over one fiber strand instead of two. On a large installation with dozens of fiber runs, cutting strand count in half reduces both initial fiber plant costs and termination labor. It also simplifies conduit fill calculations on tight infrastructure budgets.
- Single-Mode fiber compatibility: Single-mode fiber supports the longest distances and lowest attenuation — the right choice when your runs approach or exceed the 2km ceiling. If your plant is already single-mode, the P1B2K integrates without re-pulling fiber.
- SFP MSA compliance: The P1B2K conforms to the SFP Multi-Source Agreement, the industry standard that defines mechanical and electrical form factor for small form-factor pluggables. This means it seats in any MSA-compliant SFP port — host equipment from multiple vendors, not just Altronix — without requiring adapter hardware or custom caging.
- Designed to work with the P1A2K: Altronix built the P1B2K as the matched transceiver for the P1A2K fiber transmission platform. Pairing these two components eliminates the compatibility guesswork that comes with mixing unvalidated SFP modules into a transmission link.
- Compact SFP form factor: The small form-factor pluggable footprint keeps rack space consumption minimal. On dense fiber distribution panels or compact shelf units, the SFP form factor lets you run more fiber links per unit of rack space than older fixed-port transmission hardware.
Integration and Compatibility
The P1B2K is specified by Altronix to operate with the P1A2K fiber transmission system. The MSA-compliant form factor means the transceiver is physically compatible with any SFP cage built to that standard, but validated end-to-end performance is documented for the P1A2K pairing. When deploying in mixed-vendor environments or integrating with managed network switches that carry SFP uplink ports, confirm the host device's SFP port supports single-mode, bi-directional modules at the link distance you're planning. Not all SFP ports accept all optical module types even within the MSA mechanical spec — check your host equipment's supported transceiver list before ordering at volume.
For campus security deployments, the P1B2K fits naturally into fiber backbone architectures feeding network video recorders or distribution switches at distance from the camera field — anywhere you need to carry video or data reliably past the copper Ethernet limit of 100 meters.
Frequently Asked Questions
Q: What is the maximum fiber run distance supported by the P1B2K?
A: The P1B2K supports fiber runs up to 2km (6,561 ft.) over single-mode fiber.
Q: Does the P1B2K require two strands of fiber?
A: No. The P1B2K uses bi-directional single-strand transmission, meaning a single fiber strand handles both transmit and receive — reducing fiber plant requirements by half compared to conventional two-strand SFP links.
Q: Is the P1B2K compatible with SFP ports from other manufacturers?
A: The P1B2K conforms to the SFP Multi-Source Agreement (MSA) standard, which defines the mechanical and electrical interface for SFP modules. It is physically compatible with MSA-compliant SFP cages, but Altronix documents its validated performance pairing with the P1A2K. Always verify your host device supports single-mode bi-directional SFP modules at the required distance before deployment.
Q: What fiber type does the P1B2K require?
A: The P1B2K is a single-mode SFP transceiver and requires single-mode fiber infrastructure. It is not designed for multimode fiber runs.
Q: What is the P1A2K and why is it referenced?
A: The Altronix P1A2K is the companion fiber transmission platform that the P1B2K is engineered to work with. The P1B2K serves as the SFP transceiver module that plugs into the P1A2K hardware, completing the fiber link.
Q: Can the P1B2K be used in a managed network switch with SFP uplink ports?
A: The MSA form factor allows physical insertion into compatible SFP cages, but validated interoperability is documented for the P1A2K platform. If deploying in third-party switch SFP ports, confirm the switch supports single-mode bi-directional optical modules at 2km reach before committing to a design.
The P1B2K's bi-directional single-strand architecture is the detail most integrators miss when they're spec'ing fiber links in a hurry. At 2km reach on a single strand of single-mode fiber, this transceiver cuts your fiber pull in half compared to a conventional two-strand SFP design — that's not a minor convenience on a 30-camera perimeter loop where every conduit run is already tight.
Technical Highlights:
- 2km single-mode reach: Covers the longest inter-building or perimeter runs without mid-span repeaters — validated distance for the P1A2K pairing, not a theoretical ceiling.
- Bi-directional single-strand: One fiber strand carries both TX and RX. On large deployments, this halves termination count and simplifies splice tray layouts — real labor savings at scale.
- SFP MSA compliance: Standard SFP footprint seats in any MSA cage, keeping you out of proprietary lock-in on the hardware side.
Deployment Considerations:
- The P1B2K is validated against the P1A2K platform — if you're inserting it into a third-party managed switch SFP port, verify that switch's supported transceiver list explicitly includes single-mode bi-directional modules at your target distance. Many switches whitelist only dual-strand modules at extended reach.
- Single-mode fiber only — if your existing plant is OM3 or OM4 multimode, this transceiver is not compatible. Confirm fiber type at both endpoints before ordering.
The P1B2K is the right call for campus perimeter surveillance architectures where single-mode fiber is already in the ground and runs push past the 1km mark — specifically as the matched transceiver module completing a P1A2K-based fiber distribution link.
