iConverter® GXTM*

10/100/1000BASE-T UTP to 1000BASE-X Intelligent Media Converter and Network Interface Device

The iConverter GX/TM conforms to the Ethernet in the First Mile (EFM) standards to support Fiber-to-the-X Metropolitan and Enterprise LAN networks. The GX/TM provides intelligent, securely managed service demarcation at the customer premises, offering Quality of Service capabilities.


*The iConverter GX/TM modules are not supported in future software releases and are not recommended for new designs or deployments. View the iConverter GX/TM2 web page.

Carrier-Grade optical Ethernet Network Interface Device

  • Integrated SNMPv1, SNMPv2c, SNMPv3 and IP-less 802.3ah management
  • 802.3ah Link OAM for performance monitoring, early fault detection and dying-gasp
  • 802.1Q VLAN for E-Line and E-LAN services
  • Quality of Service for Voice/Data/Video over Ethernet
  • Port MIB statistics and optical performance statistics to support Service Level Agreements
  • Port Access Control for enhanced security
  • Configurable Link Fault Propagation modes
  • Small Form Pluggable (SFP) transceivers with Optical Statistics for standard or CWDM applications
  • Fixed-fiber connectors available for multimode and single-mode dual fiber and single-mode single-fiber
  • UTP auto-crossover and auto-negotiation of data rate, duplex modes and pause capabilities
  • Commercial (0 to 50ºC), wide (-40º to 60ºC) and extended (-40º to 75º C) temperature ranges
  • NEBS Compliant
  • Lifetime Warranty and free 24/7 Technical Support

The iConverter GX/TM conforms to the Ethernet in the First Mile (EFM) standards to support Fiber-to-the-X Metropolitan and Enterprise LAN networks. The GX/TM provides intelligent, securely managed service demarcation at the customer premises, offering Quality of Service capabilities. The GX/TM features built-in Operations, Administration and Maintenance (OAM) management with comprehensive monitoring, fault detection and provisioning.

The GX/TM is available as a compact standalone unit or as a chassis plug-in module. The hot-swappable GX/TM plug-in module can be mounted in a 19 or 5-Module chassis with any combination of 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 plug-in module can manage other modules in the same chassis and operate as a managed 10/100/1000 media converter. It features two Ethernet backplane ports for connectivity to adjacent modules in a chassis for multi-port and multi-service configurations.

The standalone GX/TM is available as a tabletop or wall-mount unit. The tabletop model can be DIN-rail mounted using an optional DIN-rail mounting kit. Both the tabletop and the wall-mount models are DC powered and are available with an external AC/DC power adapter or a terminal connector for DC power. The GX/TM standalone unit combines management capability with a compact chassis for deployment at the demarcation point.

The iConverter family of managed fiber access media converters are used in Service Provider access networks and Enterprise LANs. iConverter media converters provide fiber connectivity with copper-to-fiber, multimode fiber to single-mode fiber, or dual fiber to single-fiber conversions.

Metro Ethernet Access

At the Central Office, the GX/TM plug-in module is installed in a managed iConverter 19-Module chassis for high-density fiber distribution from UTP switch equipment. At Customer Premises 1, the GX/TM plug-in module is installed in a 2-Module chassis with an iConverter 4TxVT four-port switch module. The two modules share data via the Ethernet Backplane. This configuration functions as a remotely managed demarcation switch with a fiber uplink port to the network core and four copper ports that drop off Ethernet service. At Customer Premises 2, the GX/TM standalone NID provides a fiber uplink to a single copper port for intelligent demarcation of Ethernet services.


The GX/TM has integrated management, eliminating the cost and space required for external management hardware. The iConverter management system provides comprehensive remote configuration and performance monitoring. iConverter management reduces operational expenditures by keeping truck rolls to a minimum through remote provisioning, trap notification and loopback capabilities.

iConverter management is available out-of-band via IP-Less protocol using the 802.3ah OAM channel or Omnitron's Secure OAM channel, or in-band using SNMP or Telnet.

Management is accessed via Omnitron's NetOutlook® SNMP Network Management Software with an intuitive Graphical User Interface, or third party SNMP software. Telnet and CLI management interfaces are also supported, and utilize an easy to use, menu-driven interface. The CLI interface is accessed via a Serial Console Port, that provides local configuration and allows for firmware updates. Additionally, the port can be connected to a serial modem to provide an alternative remote management path.

IP-Based Management
The GX/TM can be managed through IP protocols, SNMPv1, SNMPv2c, SNMPv3 and Telnet. The IP address of the GX/TM can be user-defined or resolved through the DHCP host on the network. The IP protocols for management access can be enabled or disabled individually or as a group. Access to the management is protected by password authentication. SMNPv3 strengthens secure access to devices by a combination of authenticating and encrypting packets over the network. Management VLAN can also be defined to separate management traffic from customer traffic.

802.3ah and Secure OAM Management Channels
When utilizing a Remote OAM management channel (Secure IP-less or 802.3ah), the NID at the Customer Premises is securely managed by its fiber link partner located at the Central Office or Point of Presence. The management network IP address is not available to the customer network and is isolated by the iConverter Network Management Module (NMM) in the 19-Module Chassis at the Central Office.

A management processor on the GX/TM in the 19-Module Chassis isolates the encrypted management data from the customer data and communicates with the NMM2 via a separate management backplane bus. Management traffic on the user data lines is IP-less and carried on a securely encrypted data channel to protect the management from unauthorized access. The chassis at the Central Office requires only a single IP address to manage itself and all of the connected remote chassis managed by the Remote OAM channel. This is the ideal configuration for networks that separate secure management traffic from the service (customer) traffic on different networks, or when management IP addresses are at a premium.

Advanced Features

Fiber Port Options
GX/TM models with fixed-fiber connectors are available with multimode dual fiber, single-mode dual fiber and single-mode single-fiber options. They support ST, SC, LC and MT-RJ connectors with distances up to 550m over MM fiber, 140km over SM fiber and 40km over SF. The GX/TM Small Form Pluggable (SFP) model supports a wide variety of SFP transceivers available in 20nm increments from 1270nm to 1610nm to support FTTX and CWDM applications.

Link Modes
The GX/TM features multiple, user-selectable link fault detection modes, including Link Propagation, Remote Fault Detection and Symmetrical Fault Detection. These Link Modes provide rapid fault detection and isolation by monitoring the state of the cabling hardware, and operate independently of the network management.

Tag VLAN, Port VLAN and QoS
The iConverter GX/TM supports the IEEE 802.1Q Virtual Local Area Network (VLAN) packet tagging and untagging and the 802.1p Quality of Service priority standards.

GX/TM VLAN tunneling technology enables service providers to offer their customers E-Line and E-LAN services via Ethernet Virtual Channel (EVC), which connect business locations across town and make their networks appear to be on the same local network. VLAN technology transparently transports customer network traffic across the service provider network, and isolates it from other customer traffic and the service provider management traffic.

GX/TM Port VLAN enables the ability to specify and restrict traffic flow between the fiber, UTP, backplane and management ports.

The 802.1p prioritization standard enables delivery of Quality of Service (QoS) to high-priority, real-time applications such as voice and video over Ethernet.

Port Access Control
The GX/TM features Port Access Control which blocks user service while maintaining the network link. Port Access Control enables the service provider to control user access while maintaining port configuration for easy disabling or enabling of customer service. Port Access Control provides enterprise administrators the capability to improve network security by controlling port access when the port is not in use.

Port Statistics and Optical Performance Statistics
The GX/TM supports reporting of utilization, port and optical performance statistics. Port statistics are available for 38 different variables for the UTP and fiber ports. Additionally, full optical performance statistics are available on SFP fiber transceivers with a digital diagnostic bus.

Port and optical performance statistics reporting provides the ability to monitor customer bandwidth utilization, network performance and the link signal quality for each individual port.

IEEE 802.3ah Operations, Administration and Maintenance
The GX/TM supports the IEEE 802.3ah OAM standard, including Fault Detection, Performance Monitoring and Remote Loopback.

Fault Detection
The GX/TM detects and indicates link failures, dying gasp and other critical events.

Performance Monitoring
802.3ah Performance Monitoring tools are used for the detection and notification of link performance (quality) faults. Ethernet data performance can deteriorate slowly before disrupting service, and the GX/TM allows the setting of error-per-second thresholds. Once the pre-set error threshold is exceeded, an event notification is generated that provides early indication of a problem that may be resolved prior to loss of service.

Remote Loopback
Remote Loopback is used for fault localization and link performance testing. When a GX/TM port is in loopback mode, all received service traffic is looped back and transmitted back unaltered. The statistics from the GX/TM port and the remote link partner can be compared for consistency.


Description  iConverter GX/TM

10/100/1000BASE-T UTP to 1000BASE-X Fiber Media Converter
IEEE 802.3, 802.1Q, 802.1p, 802.1ad, RFC 2819 (RMON)
 UL, CE, FCC Class A, RoHS2, WEEE
  Frame Size  Up to 10,240 bytes
  Port Type

 10/100/1000BASE-T (RJ-45)

 1000BASE-SX (ST, SC, SFP)
 1000BASE-LX (ST, SC, SFP)
 1000BASE-ZX (SC, SFP)
 1000BASE-BX (SC, SFP)
  Cable Type Copper:

EIA/TIA 568 A/B, Category 5 and  higher

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

Universal AC
100 - 120VAC/60Hz
 0.08A @ 120VAC (typical)

100 - 240VAC/50 - 60Hz
 0.08A @ 120VAC (typical)
DC Power
DC Input

DC Input
(Terminal Block):

DC Input
(AC Adapter):
3.3VDC, 1.1A @ 3.3VDC

8 - 15VDC, 0.6A @ 9VDC max
2-Pin Terminal (non-isolated) 

8 - 15VDC, 0.6A @ 9VDC max
2.5mm Barrel Connector
Dimensions Plugin:


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: 3.1” x D: 4.8” x H: 1.0”
 L: 78.7 mm x B: 121.9 mm x H: 25.4 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
Weight Plug-in:
Standalone w/o Adapter:
Standalone w Adapter: 
 8 oz.; 226.8 grams
 1.0 lb.; 453.6 grams
 1.5 lbs.; 680.4 grams
Temperature Commercial:
     0 to 50°C
 -40 to 60°C
 -40 to 75°C
 -50 to 80°C
Humidity  5 to 95% (non-condensing)
  Altitude -100m to 4000m
MTBF (hrs) Plugin:
Standalone w/o Adapter:
Standalone w/ US Adapter:
Standalone w/ Universal Adapter:

Standalone w/o Adapter:
Standalone w/ US Adapter:
Standalone w/ Universal Adapter:

  Warranty  Lifetime warranty with 24/7/365 free Technical Support


Fiber Type / Dual Fiber or Single-FiberDistancesConnector TypeTx λ (nm)Rx λ (nm)Min.
Tx Power (dBm)
Tx Power (dBm)
Rx Sense (dBm)
Rx Sense (dBm)
Link Budget
SFP - - - - 8939-0 - - - - - - -
MM/DF 220/550m 8922-0 8924-0 8926-0 - 850 850 -10 -4 -17 -3 7
SM/DF 12km 8923-1 8925-1 8927-1 - 1310 1310 -9.5 -3 -19.5 -3 10
SM/DF 34km 8923-2 - 8927-2 - 1310 1310 -5 0 -23 -3* 18
SM/DF 80km 8923-3 - 8927-3 - 1550 1550 -5 0 -23 -3* 18
SM/DF 110km 8923-4 - 8927-4 - 1550 1550 0 5 -24 -3** 24
SM/DF 140km 8923-5 - 8927-5 - 1550 1550 2 5 -28 -8*** 30
SM/SF 20km 8930-1 - - - 1310 1550 -9.5 -3 -20 -3 10.5
SM/SF 40km 8930-2 - - - 1310 1550 -3 0 -20 -3* 17
SM/SF 20km 8931-1 - - - 1550 1310 -9.5 0 -20 -3* 10.5
SM/SF 40km 8931-2 - - - 1550 1310 -3 0 -20 -3* 17
SM/SF 20km 8932-1 - - - 1310 1490 -9.5 -3 -20 -3 10.5
SM/SF 20km 8933-1 - - - 1490 1310 -9.5 -3 -20 -3 10.5

When using single-fiber (SF) media converter models, the Tx wavelength on one end has to match the Rx wavelength on the other.
*A minimum of 3dB of attenuation is required for these models.
**A minimum of 8dB of attenuation is required for this model.
***A minimum of 13dB of attenuation is required for this model.
When ordering a Wide Temperature model, add a "W" to the end of the part number, and when ordering an Extended Temperature model, add a "Z" to the end of the part number (see chart above).


Chassis and Mounting Options Ordering Table

 19-Module 5-Module2-Module 1-Module
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
w/ 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.