STM-1 Media Converter | iConverter STM1 STM-1 Media Converter | iConverter STM1 SFPs not included
iConverter® STM1

Coax to Fiber Media Converter

The iConverter STM1 copper-to-fiber media converter converts 155.52 Mbps STM-1e coax to STM-1 fiber. It can be used in Telecom or Enterprise applications where STM-1 or OC-3 transport is required beyond the maximum distance of copper (approximately 70m).

Contact Us Where to Buy

Converts STM-1 or OC-3 75Ω coax to fiber

  • Features standard STM-1e coax interface with mini-BNC connectors
  • Adapter cables convert to standard BNC type connectors
  • Features standard STM-1 (or OC-3) optical interface
  • Standalone or plug-in module
  • Per port LED status display
  • Plug-in modules are hot-swappable in 19-Module, 5-Module, 2-Module or 1-Module chassis
  • Management of the plug-in module is available with the addition of a management module to the chassis
  • SNMP management via NetOutlook® provides real-time port and module status information, remote parameter configuration and trap notification
  • Commercial (0 to 50°C) and wide (-40 to 60°C) temperature ranges
  • Lifetime Warranty and free 24/7 Technical Support

The iConverter STM 1 copper to fiber media converter converts 155.52Mbps STM-1e coax to STM-1 fiber, and is available as a compact, unmanaged standalone unit or a managed chassis plug-in module. The iConverter STM1 can be used in Telecom or Enterprise applications where STM-1 or OC-3 transport is required beyond the maximum distance of copper (approximately 70m).

The copper port provides two mini-BNC 75Ω coax connectors that comply with the ITU-T G.703 and Telcordia GR-253 standards for CMI coded 155.52Mbps electrical interfaces. Adapter cables are included to convert the mini-BNC connectors to standard BNC type connectors.

The fiber port accepts any standard, MSA compatible 155.52Mbps Small Form Pluggable (SFP). Please refer to Omnitron’s SFP data sheets for standard STM-1/OC-3 and CWDM wavelength SFPs for ordering information.

The hot-swappable plug-in module can be mounted in a 19 or 5-Module chassis with redundant AC and DC power supplies. It can also be mounted in a 2-Module AC or DC powered chassis, or in a 1-Module chassis with AC or DC power input.

The standalone STM 1 can be wall-mounted and is DC powered. It can be ordered with an external AC to DC power adapter, or it can be DC powered using a 2-pin terminal connector.

The iConverter Multi-Service Platform consists of Network Interface Devices, T1/E1 multiplexers, CWDM multiplexers and managed media converters that combine to deliver Carrier Ethernet and TDM services over fiber or CWDM wavelengths. This flexible architecture supports a wide variety of configurations for scalable and reliable fiber connectivity in Service Provider and Enterprise networks.


The following application shows a typical SDH/SONET network where the SDH/SONET Add/Drop multiplexers drop off STM-1 (OC-3) coax or fiber to customer premises. The SDH/SONET routers at the end of each drop utilize coax interfaces.

The diagram depicts two applications of the iConverter STM1 copper-to-fiber media converter.

In the case of a coax drop from the network (a), two converters are used to convert the coax to fiber, and then back to coax for connection to the router. The use of the media converters allows the STM-1 electrical signal to reach far beyond the distance limitations of the coax.

In the case of a fiber drop from the network (b), a single converter is used to convert the optical fiber to coax, for connection to the router.

STM-1 Application

 The iConverter STM-1 plug-in module can be used in managed or unmanaged applications. Management provides remote configuration, monitoring and trap notification. Management of the STM-1 plug-in module is accomplished by installing an iConverter Management Module (NMM2) or Network Interface Device (NID) in the same chassis.

The Management Module can be accessed via SNMP, Telnet, and serial port. The STM-1 can be managed with Omnitron’s intuitive, graphic-oriented NetOutlook SNMP Management Software or third party SNMP management software. Management via the Telnet and the serial interfaces have an easy-to-use, menu-driven interface.

The management software can override the physical DIPswitch settings such as link modes. Some of the real-time STM-1 parameters that can be monitored include power, link, data activity status, module type and model, hardware and software revisions, serial numbers and a user-defined identifier.

The iConverter STM-1 supports SNMP trap notification for the monitoring and notification of different network events. Specific events that generate traps include module insertion and removal, and port link-up and link-down. Trap monitoring of specific events can be selectively enabled or disabled by the network management software.


 iConverter STM 1

STM-1/OC-3 Coax to Fiber Media Converter
ITU-T-G.957, Telcordia GR-253
ITU-T G.703 and Telcordia GR-253 for CMI coded 155.52Mbps.
UL, CE, FCC Class A, RoHS2 (6/6), WEEE, REACH
Port Types

155.52Mbps electrical (mini-BNC)

Cable Types

75 ohm coax
Mini-BNC to BNC adapter cables included
with the STM1 media converter.

Multimode: 50/125μm, 62.5/125μm
Single-mode: 9/125μm
AC Power
AC Adapter:

AC Adapter:
100 - 120VAC/60Hz
0.05A @ 120VAC

100 - 240VAC/50 - 60Hz
0.05A @ 120VAC
DC Power
DC Input:

DC Input:
(Terminal Block)

DC Input:
(AC Adapter)
3.3VDC, 0.5A @ 3.3VDC

7 - 32VDC, 0.3A @ 9VDC (1.0A max)
2-Pin Terminal (non-isolated)

7 - 32VDC, 0.3A @ 9VDC (1.0A max)
2.5mm Barrel Connector

W: 0.85” x D: 4.5” x H: 2.8”
L: 21.6 mm x B: 114.3 mm x H: 71.1 mm

W: 3.8” x D: 4.8” x H: 1.0”
L: 96.5 mm x B: 121.9 mm x H: 25.4 mm
Standalone w/o Adapter:
Standalone w Adapter:
8 oz.; 226.8 grams
1.0 lb.; 453.6 grams
1.5 lbs.; 680.4 grams
    0 to 50°C
 -40 to 60°C
 -40 to 80°C
5 to 95% (non-condensing)
-100m to 4,000m
MTBF (hrs)
Standalone w/o Adapter:
Standalone w/ US Adapter:
Standalone w/ Uni Adapter:
Lifetime warranty with 24/7/365 free Technical Support

Click on a model number below to buy online in the USA.

For other USA and International resellers, click here


Port Configuration
Model Number
Port 1
Port 2
Order the appropriate SFPs separately. Visit the Omnitron Optical Transceivers web page.
Contact Omnitron for RoHS (5/6) compliant models.




Mini-BNC to BNC adapter cables included with the STM1 media converter.


Chassis and Mounting Options Ordering Table

 19-Module 5-Module2-Module 1-Module
(60 watts)
(120 watts)
One (1) Power Supply 8200-1 8201-1 8206-1 8205-1 8220-1 8226-1 8225-1 8230-0 8235-0 8240-1 8240-2
One (1) Power Supply with Dying Gasp Support - - - - - - - 8230-1 8235-1 8241-1 8241-2
Two (2) Power Supplies 8200-2 8201-2 8206-2 8205-2 8220-2 8226-2 8225-2 - - 8245-111* 8245-112*
Three (3) Power Supplies 8200-3 8201-3 8206-3 8205-3 - - - - - - -
Spare Power Supply 8200-9 8201-9 8206-9 8205-9 8220-9 8226-9 8225-9 - - - -
23" Rack Mounting Kit 8091-2 8091-2 8091-2 8091-2 8092-2 8092-2 8092-2 - - - -
Blank Module Panel 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 - -
Wall Mounting Hardware Kit -   - - - - - 8249-0 8249-0 8249-0 8249-0
1U 19" Rack Mount Shelf - - - - - - - 8260-0 8260-0 8260-0 8260-0
DIN Rail Mounting Kit -   - - - - - - - 8250-0 8250-0
DIN Rail Mounting Clip -   - - - - - 8251-0 8251-0 8251-0 8251-0

Use the Power Calculator  to determine the iConverter chassis power supplies required for your module configuration.

Ask a Question

(*) Required field

1000 characters left