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The FRM220-GFOM04-SR is a versatile GbE Fiber Multiplexer designed to efficiently transmit multiple data streams over fiber optic connections, offering robust support for both 4 x E1/T1 voice/data interfaces via RJ-45 connectors and 10/100/1000Base-T Ethernet connectivity. This compact and modular card is part of the FRM220 series, enabling seamless integration into existing telecom and enterprise infrastructures. It supports fiber optic transmission, providing high-speed, long-distance communication with low latency and minimal interference. The in-band management feature allows for remote monitoring, configuration, and troubleshooting through the same fiber link used for data transmission, simplifying network management and reducing operational complexity. Ideal for applications in telecom networks, ISPs, and enterprise setups, the FRM220-GFOM04-SR enables cost-effective multiplexing of legacy E1/T1 lines and high-speed Ethernet over a single fiber link, ensuring scalability and reliability in mission-critical environments.
Specifications
| E1/T1 ports | Framing | Unframed (transparent) |
| Bit Rate | E1:2.048 Mb/s , T1: 1.544Mb/s | |
| Line Code | E1:AMI/HDB3, T1: AMI/B8ZS | |
| Line Impedance | E1: Unbalanced 75 ohms (BNC) | |
| E1: Balanced 120 ohms (RJ-45) | ||
| T1: Balanced 100 ohms (RJ-45) | ||
| Receiver sensitivity | Short haul | |
| “Pulse” Amplitude | Nominal 2.37V+/-10% for 75 ohms | |
| Nominal 3.00V+/-10% for 120 ohms | ||
| “Zero” Amplitude | +/-0.3V | |
| Internal Timing | +/-30 ppm | |
| Jitter Performance | According to ITU-T G.823 | |
| Performance monitoring | According to ITU-T G.821 | |
| Standards | ITU-T G.703, G.704, G.706 and G.732 | |
| Interface Connectors | RJ-45 | |
| Test Loops | LLB (Local Loop Back) | |
| NELB (Near End Loop Back) | ||
| RLB (Remote Loop Back) | ||
| RRLB (Request Remote Loop Back) |
| Fiber | Connector | SFP LC |
| Data Rate | 1.25 Gbps | |
| Ethernet | Interface Type | 10/100/1000Base-T |
| Connector | RJ-45 | |
| Standards | IEEE 802.3, 802.3u, 802.3ab | |
| Duplex modes | full/half | |
| Indications | FX1 Link, FX2 link, E1/T1 Mode/Link/Loopback test, Order wire phone indicator, LAN Link/Speed | |
| Power Input | 12VDC | |
| Power Consumption | < 12W | |
| Dimensions | 159.5 × 42.1 × 88mm (D×W×H) | |
| Weight | 200g | |
| Temperature | 0 ~ 50°C (Operating), -10 ~ 70°C (Storage) | |
| Humidity | 10 ~ 90% RH (non-condensing) | |
| Certifications | CE, FCC | |
| MTBF | 65,000hrs | |
Ordering Information
| Model Name | Description |
| FRM220-GFOM04-SR | 4 x E1/T1 RJ-45 and 10/100/1000Base-T Ethernet fiber optic multiplexer card (optional SFP module) |
Managed 4E1/T1 + Gigabit Ethernet Fiber Optical Multiplexer Application
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GbE Fiber Multiplexer with In-Band Management FRM220-GFOM04-SR
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DCT’s Skilled Management Team has more than twenty-five years of experience and expertise in the local business environment, coupled with a highly motivated group of employees, positions us as the preferred supplier among the major customers in the industry.
DCT Competitive Edge is the prompt response to our customer needs, the online and on-site direct technical support, professional consulting for the best cost/performance solution, on-time delivery, long-term maintenance, and support.
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