The DIGISOL DG-SA1123-BDT and DIGISOL DG-SA1123-BDR are Bi-Directional (BiDi) SFP optical transceiver modules designed for full-duplex fiber communication over a single optical fiber strand.
What Makes These Different
Unlike standard SFP modules that require:
- one fiber for transmit (TX)
- one fiber for receive (RX)
these BiDi SFPs use only one fiber core by transmitting and receiving on different wavelengths.
This helps:
- reduce fiber infrastructure cost,
- simplify deployments,
- maximize existing fiber utilization.
Key Features
- Bi-Directional (BiDi) Technology
- Full duplex communication over a single fiber.
- SFP MSA Compliant
- Compatible with standard SFP ports.
- Hot Pluggable
- Can be inserted/removed without shutting down equipment.
- Low Power Dissipation
- Suitable for continuous enterprise or ISP operation.
- 3.3V Power Supply
- Standard SFP operating voltage.
- 20 km Transmission Distance
- Designed for long-range connectivity over:
- Single-mode fiber (SMF)
- 9/125μm optical cable
- Designed for long-range connectivity over:
How the Pair Works
These modules are used in pairs:
| Module | Function |
|---|---|
| DG-SA1123-BDT | TX/RX on one wavelength |
| DG-SA1123-BDR | TX/RX on opposite wavelength |
One side must use the BDT, and the other side must use the BDR.
Typical Applications
- Enterprise fiber backbone
- ISP access networks
- CCTV fiber transmission
- Campus networking
- Industrial networking
- Fiber uplinks between switches
Advantages of BiDi SFP
- Uses only one fiber strand
- Lower cabling cost
- Easier upgrades on limited fiber infrastructure
- Ideal where spare fibers are unavailable
Important Compatibility Checks
Before deployment, verify:
- Switch/router has standard SFP port
- Single-mode fiber availability
- Correct pairing of BDT ↔ BDR modules
- Supported wavelength compatibility
Compatible with many devices from:
- DIGISOL
- Cisco
- MikroTik
- Ubiquiti
- D-Link
- TP-Link
