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CTC Union FRM220-FXO-FXS-SC02B POTS (RJ11) over multimode single strand fiber converter, telephone line extender

CTC Union FRM220-FXO-FXS-SC02B POTS (RJ11) over multimode single strand fiber converter, telephone line extender

SC Connector 2Km, B type (Requires matching A type – works as a matched pair)

Availability: In Stock

Product Information

Product description
The FRM220-FXO-FXS-SC02B is a POTS (RJ11) port over fiber optic media converter. The PSTN two-wire POTS telephone port can be configured either as an FXO (PBX trunk) or FXS (telephone set/fax machine/dial-up modem) device just by a simple DIP switch setting. Using a pair of converters, a telephone line can be extended over a fiber optic circuit, providing full service and features like Caller ID. The converter can be used in service mode, alowing connection of 2 telephone sets in between. FRM220-FXO-FXS-SC02B operates on multimode fiber up to 2Km (1.3mi) distance and it is using a SINGLE STRAND of multi-mode fiber, either 62.5/125um or 50/125um. The fiber media converter has only one SC type optical connector and does the BiDirectional communication using Tx: 1310nm and Rx: 850nm wavelengths.

An FRM220-FXO-FXS-SC02B must be paired with FRM220-FXO-FXS-SC02A model, which is acting complementary over the fiber, using Tx: 850nm and Rx: 1310nm.
The BiDirectional model is saving precious strands of fiber for very little price difference. When fiber is scarce, using a BiDirectional model will halve the fiber requirements while providing absolutely same performance as a dual strand model.

Technical specifications

POTS Line: FXO (Impedance:600ohms, REN:0.4), FXS (Feedback Voltage: 48VDC, Ring: 90Vp-p)
Interfaces: RJ11 port 600Ohms and single SC BiDirectional 155M fiber port
Operating wavelength: Tx: 1310nm / Rx:850nm multimode
Operating distance: 2Km on 62.5/125um or 50/125um fiber
Optical connector: SC single connector
Front LEDs: Power, Fiber Link, Di/Do, Test mode
Power: External 90-260V AC switching adapter 9VDC@1A with NEMA1-15(2 blades only), US type main plug
Temperature: 0 50°C (Operating); 0 70°C (Storage)
Humidity: 20 80% non condensing (Operating); 0 90% (Storage)
Consumption: less than 5W
Dimensions(WxDxH): 88mm x 155mm x 23mm
Weight: 330g (without AC adapter)
Compliance: CE, FCC Class A
MTBF: 65,000 hours

Fiber power budget for multimode BiDIrectional models

Model Distance Lambda Min. Output (dBm) Sensitivity (dBm) Power Budget (dB)
FRM220-FXO-FXS-SC02A 2Km T:850/R:1310nm -20 -31 11
FRM220-FXO-FXS-SC02B 2Km T:1310/R:850nm -20 -31 11

Additional information

Weight 0.5 lbs
Dimensions 8 × 6 × 4 in

PVC-coated Products; PVC-coated Wires and Cables

WARNING: This product may expose you to chemicals including DINP and/or DEHP, which are known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to or our information page: California Proposition 65 Info.