Specifications

Chapter 1 Introduction Installation and Operation Manual
1-2 Overview FOM-E3/ETH, FOM-T3/ETH Ver. 1.0
Features
Ethernet Interface
The Ethernet interface of the FOM-E3/ETH and FOM-T3/ETH modems is a high
performance self-learning Ethernet bridge module, fully compatible with
IEEE 802.3/Ethernet V.2, IEEE 802.1p standards. It also supports the relevant
parts of the IEEE 802.1q standard, enabling VLAN applications.
The Ethernet interface provides one LAN connection, which can be either
10BaseT (UTP) or 100BaseT (UTP), both with VLAN tagging support.
Two-level packet prioritization is implemented for VLAN in conformance with the
IEEE 802.1p standard.
The LAN link operates at a data rate of up to 10 Mbps for 10BaseT ports or up to
100 Mbps for 100BaseT ports.
Autonegotiation allows plug-and-play Ethernet connection.
The Ethernet module is configured via an internal DIP switch.
E3/T3 Fiber Optic Interface
FOM-E3/ETH and FOM-T3/ETH are designed to operate with several different
grades and sizes of fiber optic cable and provide the user with:
• Extended high rate range transmission
• Immunity to electrical interference such as EMI, RFI, spikes and differential
ground loops
• Secure data transfer (no tapping on the transmitted information)
• Protection from sparks and lightning
• Secure link in hazardous or hostile environment.
Table 1-1. FOM-E3/ETH and FOM-T3/ETH Fiber Optic Interface Options
Wavelength
[nm]
Fiber Type
[μm]
Transmitter Type Typical
Power
[dBm]
Receiver
Sensitivity
[dBm]
Typical
Max. Range
[km] [mi]
850 62.5/125 multimode VCSEL -15 -34 4.5 2.8
1310 9/125 single mode Laser -12 -31 38 23.6
1310 9/125 single mode Laser (long haul) -2 -34 70 43.4
1550 9/125 single mode Laser -12 -31 68 42.2
1550 9/125 single mode Laser (long haul) -1 -34 110 68.3
1310/1550 9/125 single mode Laser (WDM), SF1, SF2 -12 -30 40 24.8
1310 9/125 single mode Laser (single strand fiber), SF3 -12 -27 20 12.4