ALLNET ALL-MC103G SC MM / Media Converter 1000BaseTX/SC content_copy

The Allnet media converter ALL-MC103G-SC-MM is designed for connecting an Ethernet network over copper cable (TP) with a Gigabit network over multimode optical fiber (LWL). It enables data transmission at Gigabit speeds (1 Gbit/s) between both media, with the TP port supporting the 10/100/1000BaseT standards and the LWL port implementing the 1000BaseSX standard for multimode fiber with SC connector. This converter is suitable for use in local area networks (LAN) where extending the network range via fiber optic cables is required, for example in office buildings, industrial facilities, or when connecting network segments over longer distances.

Applications

The media converter is designed for use in Gigabit Ethernet networks where data must be transferred from a copper cable (RJ-45) to a multimode fiber cable (SC). It is commonly used in environments where the maximum copper cable range of 100 meters is exceeded, such as when connecting network devices in different buildings or floors. Support for multimode fiber with diameters of 62.5/125μm (up to 220 m) and 50/125μm (up to 550 m) makes it flexible for various fiber installations. The operating temperature range of 0 to 50 °C and humidity of 10 % to 90 % (non-condensing) allow for use in indoor environments under normal operating conditions.

Functions and Features in Detail

The converter features an RJ-45 connector for copper connection (TP port) and an SC connector for multimode fiber (FX port). The TP port supports half- and full-duplex transmission, Auto-MDI/MDI-X, and Auto-Negotiation, enabling automatic adaptation to the speed and duplex mode of the connected device. The LWL port is designed for 1000BaseSX and supports Ethernet-802.3x flow control, ensuring controlled data transmission and preventing overloads. LED indicators display operational status: a Power LED for power supply, and for the TP port, one Link and one TX LED, and for the FX port, one Link and one RX LED, allowing visual monitoring of connection status.

Technology Explained Simply

The converter acts as a bridge between two different transmission media: copper cable (Twisted Pair) and optical fiber (LWL). While copper cables are suitable for short distances up to 100 m, multimode fiber enables longer reach, with the exact distance depending on the fiber type. With 62.5/125μm fiber, the maximum reach is 220 m; with 50/125μm fiber, up to 550 m. Data transmission occurs at Gigabit speeds (1 Gbit/s), with the fiber side using the 1000BaseSX standard. Power supply is via an external power adapter providing 5 V/2 A, which according to the manufacturer is included in the delivery. The maximum power consumption is 3 W.

Compatibility and Accessories

The converter is compatible with Cat. 5, Cat. 5e, and Cat. 6 UTP/STP cables for the TP port. For the LWL port, multimode fiber cables with SC connectors are required, with the exact reach depending on the fiber type. Additional accessories include other media converters from the ALL-MC series, such as the ALL-MC104G-SFP1 for SFP modules or the ALL-MC105G-SC-SM for single-mode fiber. Additionally, a power supply for the ALL-MC-1xx series, wall mounting options, and a 14-slot chassis for use in rack systems are available.

Mounting and Installation

The converter is compact, with dimensions of 94 × 71 × 26 mm (L × W × H) and a weight of 230 g (without power supply and packaging). It can be directly connected to a network device, with power supplied via the external power adapter. Installation requires no special tools; the connectors are standardized and can be connected using common network cables and fiber cables. The LED indicators facilitate fault diagnosis during commissioning.

Advantages in Operation

Using this converter enables flexible network extension via fiber optic cables, significantly increasing network range. Support for Auto-Negotiation and Auto-MDI/MDI-X ensures easy and error-free integration into existing networks. The flow control function prevents data loss during overloads. The compact design and integrated LED indicators simplify installation and maintenance. Compliance with IEEE 802.3, 802.3u, 802.3ab, 802.3z, and 802.3x standards ensures interoperability with common network devices. The CE marking confirms compliance with European safety and EMC directives.

Technical data
Fibre connection	SC
Medium side A	MM
Speed	1G

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