2 Channel (POTS) with I/O System

Extend Voice and Contact Closure Over Fiber

Overview
Features
Specs
Docs
Diagrams
PN

The RLH 2 Channel Plain Old Telephone Service (POTS) DIN Fiber Link system transports two analog phone lines over fiber optic cable. Each unit also features bi-directional contact closure for remote relay transportation. The system will operate over a wide temperature range and has been designed to provide reliability in harsh environments.

Common applications include extending analog lines over fiber for the benefit of electrical isolation, to achieve long distances, or through noisy environments to reduce EMI. The system is compatible with all traditional analog phone services, dial-up modems, meters, and fax machines.

A comprehensive set of LED’s on the front panel indicate the status of the power, fiber, phone lines, and contact closure. The standard system powering requirement is 24-48VDC, with an optional 125VDC available. This rugged system also features dual redundant power inputs with a system alarm contact relay, and comes standard with DIN clip and wall mount ears.

View Our Fiber Optic Converters Beginner’s Guide

Features

Hardened to operate in -40°C to +70°C environment
Redundant power capable, 24-56VDC or 125VDC depending on model
Available with ST or SC connectors for singlemode or multimode fiber
Supports Caller ID
Supports Call-Forward Disconnect (Hook Flash)
Supports Ringdown Function (FXS to FXS Hotline Phone)
Supports Bi-Directional Contact Closure transmission
Standard 2 wire analog phone lines, dial-up modems, and fax machines
Limited Lifetime Warranty
Made in USA

Please see the product documentation for the complete list of specifications

Wavelength:
Multimode: 1310nm
Singlemode: 1310nm/1550nm

Maximum Fiber Attenuation/Distance:
Dual Fiber Multimode (50/125μm & 62.5/125μm): 1.25mi./2km range
Dual Fiber Singlemode (9/125µm): 12.4 mi./20km range, 37 mi./60km range, 74 mi./120km range
Single Fiber, Bi-Directional Singlemode (9/125μm): 12.4 mi./20km range, 37 mi./60km range

Fiber Connector Type:
ST or SC

Physical Dimensions:
H 4.93” x W 1.20” x D 3.93” (measurement not including DIN clip)
Includes standard T-35 DIN rail clip and wall mount ears

Operating Temperature:
-40 ̊C to +70 ̊C

Operating Humidity:
95% non-condensing

General Information

Guide

Fiber Optic Converters: A Beginner’s Guide

PD-2FXO-IO-03-1
PD-2FXS-IO-03-1
PD-2FXO-IO-04-1
PD-2FXS-IO-04-1
PD-2FXO-IO-40-1
PD-2FXS-IO-40-1
PD-2FXO-IO-41-1
PD-2FXS-IO-41-1
PD-2FXO-IO-45-1
PD-2FXS-IO-45-1
PD-2FXO-IO-50-1
PD-2FXS-IO-50-1
PD-2FXO-IO-51-1
PD-2FXS-IO-51-1
PD-2FXO-IO-55-1
PD-2FXS-IO-55-1
PD-2FXO-IO-10-1
PD-2FXS-IO-11-1
PD-2FXO-IO-14-1
PD-2FXS-IO-15-1

$790.00 – $1,230.00

Lead Time: 1 to 2 Weeks*

Order Now

Contact Sales

For product questions, volume pricing and/or delivery outside of the US and Canada, please contact sales.

Ordering

Product configuration	Side	Mode	Connector	Distance	Fibers	Part number	Price		hf:att:pa_side	hf:att:pa_mode	hf:att:pa_connector	hf:att:pa_distance
FXO, Multimode, SC, 2km/1.2 miles, Dual Fiber	FXO	Multimode	SC	2km/1.2 miles	Dual Fiber	PD-2FXO-IO-03-1	$790.00	2 Channel (POTS) with I/O System quantity	fxo	multimode	sc	2km-1-2-miles
FXS, Multimode, SC, 2km/1.2 miles, Dual Fiber	FXS	Multimode	SC	2km/1.2 miles	Dual Fiber	PD-2FXS-IO-03-1	$790.00	2 Channel (POTS) with I/O System quantity	fxs	multimode	sc	2km-1-2-miles
FXO, Multimode, ST, 2km/1.2 miles, Dual Fiber	FXO	Multimode	ST	2km/1.2 miles	Dual Fiber	PD-2FXO-IO-04-1	$790.00	2 Channel (POTS) with I/O System quantity	fxo	multimode	st	2km-1-2-miles
FXS, Multimode, ST, 2km/1.2 miles, Dual Fiber	FXS	Multimode	ST	2km/1.2 miles	Dual Fiber	PD-2FXS-IO-04-1	$790.00	2 Channel (POTS) with I/O System quantity	fxs	multimode	st	2km-1-2-miles
FXO, Singlemode, SC, 20km/12.4 miles, Dual Fiber	FXO	Singlemode	SC	20km/12.4 miles	Dual Fiber	PD-2FXO-IO-40-1	$900.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	sc	20km-12-4-miles
FXS, Singlemode, SC, 20km/12.4 miles, Dual Fiber	FXS	Singlemode	SC	20km/12.4 miles	Dual Fiber	PD-2FXS-IO-40-1	$900.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	sc	20km-12-4-miles
FXO, Singlemode, SC, 60km/37 miles, Dual Fiber	FXO	Singlemode	SC	60km/37 miles	Dual Fiber	PD-2FXO-IO-41-1	$1,010.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	sc	60km-37-miles
FXS, Singlemode, SC, 60km/37 miles, Dual Fiber	FXS	Singlemode	SC	60km/37 miles	Dual Fiber	PD-2FXS-IO-41-1	$1,010.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	sc	60km-37-miles
FXO, Singlemode, SC, 120km/74 miles, Dual Fiber	FXO	Singlemode	SC	120km/74 miles	Dual Fiber	PD-2FXO-IO-45-1	$1,230.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	sc	120km-74-miles
FXS, Singlemode, SC, 120km/74 miles, Dual Fiber	FXS	Singlemode	SC	120km/74 miles	Dual Fiber	PD-2FXS-IO-45-1	$1,230.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	sc	120km-74-miles
FXO, Singlemode, ST, 20km/12.4 miles, Dual Fiber	FXO	Singlemode	ST	20km/12.4 miles	Dual Fiber	PD-2FXO-IO-50-1	$900.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	st	20km-12-4-miles
FXS, Singlemode, ST, 20km/12.4 miles, Dual Fiber	FXS	Singlemode	ST	20km/12.4 miles	Dual Fiber	PD-2FXS-IO-50-1	$900.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	st	20km-12-4-miles
FXO, Singlemode, ST, 60km/37 miles, Dual Fiber	FXO	Singlemode	ST	60km/37 miles	Dual Fiber	PD-2FXO-IO-51-1	$1,010.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	st	60km-37-miles
FXS, Singlemode, ST, 60km/37 miles, Dual Fiber	FXS	Singlemode	ST	60km/37 miles	Dual Fiber	PD-2FXS-IO-51-1	$1,010.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	st	60km-37-miles
FXO, Singlemode, ST, 120km/74 miles, Dual Fiber	FXO	Singlemode	ST	120km/74 miles	Dual Fiber	PD-2FXO-IO-55-1	$1,230.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	st	120km-74-miles
FXS, Singlemode, ST, 120km/74 miles, Dual Fiber	FXS	Singlemode	ST	120km/74 miles	Dual Fiber	PD-2FXS-IO-55-1	$1,230.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	st	120km-74-miles
FXO, Singlemode, SC, 20km/12.4 miles, Single Fiber - Side A	FXO	Singlemode	SC	20km/12.4 miles	Single Fiber - Side A	PD-2FXO-IO-10-1	$930.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	sc	20km-12-4-miles
FXS, Singlemode, SC, 20km/12.4 miles, Single Fiber - Side B	FXS	Singlemode	SC	20km/12.4 miles	Single Fiber - Side B	PD-2FXS-IO-11-1	$930.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	sc	20km-12-4-miles
FXO, Singlemode, SC, 60km/37 miles, Single Fiber - Side A	FXO	Singlemode	SC	60km/37 miles	Single Fiber - Side A	PD-2FXO-IO-14-1	$1,070.00	2 Channel (POTS) with I/O System quantity	fxo	singlemode	sc	60km-37-miles
FXS, Singlemode, SC, 60km/37 miles, Single Fiber - Side B	FXS	Singlemode	SC	60km/37 miles	Single Fiber - Side B	PD-2FXS-IO-15-1	$1,070.00	2 Channel (POTS) with I/O System quantity	fxs	singlemode	sc	60km-37-miles

A complete system requires 2 devices of either configuration:
– One FXO device paired with one FXS device for a typical phone line extension
– Two (2) FXS device paired for a ringdown hotline
Bi-Directional single fiber models require an A side and B side unit for a complete system
For the 125VDC input power option, please note your part number, add -A to the end, and get your quote here