Chapter 1 Introduction
1.7.12 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, ty s and alarms.
Both card and remote can be configured to enable or disa XS mode.
Features
• Extend telephone voice transmission from 2km to 120km over f
• Management via terminal, web or SNMP in FRM220-CH20 ch
• 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 SF
Cable type : MM 62.2/125μm, 50
Distance : MM 2km, SM 15/3
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)
pe, version, fiber link status, on hook statu
ble the port, reset the port and set the FXO or F
iber
assis
P LC
/125μm. SM 9/125μm
0/50/80/120km, WDM 20/40/60/80km
21
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