Transport POTS, 4W DATA, RS-232, T1, & Gigabit Ethernet Over Fiber

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Multi Service Icon

1 RU Icon

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  • Multiplexes up to 16 voice and data channels plus Gigabit Ethernet over a single fiber
  • Up to 4 modules (each with 4 channels) may be used in any combination to mix and match services
  • Convenient front LED status indicators
  • T1, RS232, POTS, & 4 Wire Data service modules
  • 4 built-in Gigabit Ethernet ports
  • Aggregated Ethernet throughput up to 800 Mbps
  • Supports VLAN, QoS, and Port Rate control
  • SFP’s are hot swappable & provide 1+1 redundancy
  • Ethernet Ports can be configured to be Isolated Channels or Shared
  • Supports SNMP , HTTP / FTP / TFTP remote software upgradeable
  • HTTP and SNMP Monitoring and Configuration
  • The POTS modules support phone extensions as well as ring down
  • Redundant DC and dual AC and DC powering options available

iMux SFPThe iMux is a powerful fiber optic modular multiplexer capable of transmitting over fiber up to 16 channels of T1, RS232, 4 Wire Data, and POTS. Additional to the 16 channels every system includes a built-in 4 Port Gigabit Managed Ethernet switch.

Each of these services are supplied by our communication modules, each module will transport up to 4 channels of the specified service and may be installed in any combination. Spares or add-on modules may be ordered separately and are field installable.

Gigabit SFPs are used for the back-haul fiber transport of the communication services. Each iMux will take up to 2 SFPs for redundancy. The SFPs are hot swappable and automatically fail over in case of a failure in the primary fiber path.

The iMux may be managed through SNMP, web Interface, craft port or menu keys on the front panel. It also has an external alarm port for alarm monitoring, as well as 4 programmable alarm contacts. The system provides local/remote loopback functions that are ideal for network testing and maintenance.

The iMux takes up 1RU and comes complete with EIA19” and 23” rack ears, or it may be used on a desktop or shelf.


For a comprehensive review of the product specs, please see the Data Sheet, or feel free to contact us with any questions.

Powder coated Metallic housing

Ethernet Ports:
(4) 10/100/1000 Mbps

Service Port Modules:
Analog Phone (POTS), T1, 4W AUDIO DATA 600 OHMS, & RS-232

*Supports up to four modules in any combination

Web Interface:
Intuitive Web Interface for Configuration & Management

Mounting Style:
Rack Mount 1 RU

Operating Temperature:
-32°F to 122°F (0°C to 50°C)

Powering Options:
Redundant power inputs DC + DC or AC + DC

3 Years

Multiple Service Example

Multiple Service Example

16 Channels of POTS Example

16 Channels of POTS Example

16 Channels of T1 Example

16 Channels of T1 Example


Download the RLH Data Sheet

Download the RLH User Guide

Download the Product Information


See the chart below for ordering instructions. Download and print the chart to aid in ordering.

iMux Modular Multiplexer System

Ordering Information

iMux Base System

DescriptionPower 1Power 2DimensionsPart Number
iMux Base System
Dual DC Input Power
48 VDC48 VDCW17.3in x D11.2in x H1.75in
(440mm x 285mm x 44.5mm)
iMux Base System
AC and DC Input Power
115/220VAC48 VDCW17.3in x D11.2in x H1.75in
(440mm x 285mm x 44.5mm)

Service Port Modules - 4 Channels

DescriptionPart Number
T-1 Module - 4 ChannelsRLH-MM-T1
RS-232 Module - 4 ChannelsRLH-MM-D1
2 Wire POTS - FXO/CO Module - 4 ChannelsRLH-MM-AO
2 Wire POTS - FXS/SUB Module - 4 ChannelsRLH-MM-AS
4 Wire Analog Data (600 Ohm AUDIO) Module - 4 ChannelsRLH-MM-D2
  • Only iMux Base Systems ordered with the ordering matrix are pre-installed and pre-configured.
  • 2 multiplexers are required for a complete system.
  • Please contact your RLH sales representative for pricing and delivery information.

Please submit a quote request or contact your RLH sales representative for pricing and delivery information.