Specifications

Appendix A
106
A.10 FRM220-FXO/FXS In-band managed POTS (Voice) over Fiber Modem
FRM220-FXO/FXS POTS phone line converter extender is used to connect PSTN voice signals to distant Plain
Old Telephone (POTS) devices. FRM220-FXO/FXS provides a fiber media transport for POTS transmission and
features an RJ-11C for copper connection. A pair of FRM220-FXO/FXS is required to implement an end to end
system. FXO mode connects to a telephone line or PBX and has ability to detect ringing voltages and to act as a
telephone. FXS mode is the reciprocal unit and has ability to act as PSTN and connects to a telephone device.
When the FRM220-FXO/FXS card is placed in the FRM220 rack with SNMP management, in-band management
allows viewing the card and remote converter's status, type, version, fiber link status, on hook status and alarms.
Both card and remote can be configured to enable or disable the port, reset the port and set the FXO or FXS mode.
Features
• Extend telephone voice transmission from 2km to 120km over fiber
• Management via terminal, web or SNMP in FRM220-CH20 chassis
• Manage stand-alone via DIP Switch
• Supports telephone voice transmission
• Supports caller ID pass through
• Selectable FXO or FXS mode
• Supports FXS to FXS hot line
Specifications
Ports
Optical Interface
Connector : 1x9 (SC, ST, FC) or SFP LC
Cable type : MM 62.2/125μm, 50/125μm. SM 9/125μm
Distance : MM 2km, SM 15/30/50/80/120km, WDM 20/40/60/80km
Wavelength: 1310nm, 1550nm,
Electrical Interface
Connector : RJ-11
FXO mode
Impedance : 600 ohms
Coding : 16 bits liner
Loop Current : 10~100mA
Ring Frequency : Acceptable 20 ~50Hz
Insertion Loss: 0.0 ± 1.0dB at 1000Hz
FXS mode
Impedance : 600 ohms
Coding : 16 bits liner
Dial: DTMF and Dial Paul
Battery Source: 48VDC ± 4V
Ringing Waveform : Sine wave
Ringing Frequency : 20/25/30/50 Hz selectable
Ring Cadence: FXS to FXS : On / 1 sec, Off / 2 sec
FXO to FXS; Reproduces the cadence detected by FXO
Insertion Loss 0.0 ± 1.0dB at 1000Hz
REN: 4.0B(Ring Equivalence Number)
LEDs Power, FX Link, Phone Act, Test
Power DC In 12V
Power Consumption
< 5W
Dimension (D x W x H) mm 155 x 88 x 23mm
Weight 120g
Temperature
-10~60° C (Operating) ,-20~70° C (Storage)
Humidity 10~95% non-condensing
Certification CE LVD/EMI, FCC, RoHS
MTBF
65,000 h (25° C)
This product includes the following models:
• FRM220-FXO/FXS (POTS over Fiber fixed transceiver)
• FRM220-FXO/FXS-S (POTS over Fiber SFP)