TW-6120 FSO Modem

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TW-6120 FSO Modem




High Troughput & Low Latency

TrellisWare’s TW-6120 modem provides industry leading performance for tactical Free Space Optical (FSO) communications links. With throughputs up to 850 Mbps, the TW-6120 is making the next generation of FSO systems a reality today.

Atmospheric Scintillation

Built on TrellisWare’s F-LDPC error correcting codes, the TW-6120 uses Hybrid-ARQ and fast rate adaption to optimize modem performance on a millisecond-by-millisecond basis. The TW-6120 dramatically reduces the effects of atmospheric scintillation on links up to 70 km.

Built for Harsh Conditions 

Designed to enable tactical FSO links, the TW-6120 is engineered to provide robust and reliable communications in real-world operation. Environmentally sealed electronics and an internal heat exchanger allow use across a full range of field conditions.

Designed for Interoperability

Compliant with the TALON architecture, the TW-6120 can be easily integrated with a variety of optical and system architectures.



Size 1.75”(H) x 17.5”(W) x 16.5”(D)
Weight 13 lbs.
Rack Mount 19” rack mountable
Throughput Range Up to 70 km
Rate Adaptation Automatic
Payload Buffer Up to 16,384 packets
Environmental MIL-STD-810G
Operating Temperatures -40 C to +55 C
Power 28 VDC, < 80 W
Optical Wavelength Optical C-band, configurable via internal SFP module
Optical Interface Single-mode FC/PC Tx Multi-mode FC/PC Rx
Payload Data Interface Dedicated 10/100/1000 Base-T Ethernet
Control Interfaces Dedicated 10/100/1000 Base-T Ethernet, TALON Modem ICD compliant
Configuration & Status Dedicated LEDs for general status, TALON status and configuration, Built-in web GUI, SNMPv3
Networking Dynamic Link Exchange Protocol (DLEP)


TW-6120 modem




TW-6120, FSO Modem, TrellisWare