RAD FOM-E3

FOM-E3, FOM-T3 High Speed Fiber Optic Modems for E3, T3 • Different optical interfaces are available: − 850 nm wavelength for multimode fibers − 1300 nm wavelength for single mode fibers − 1300 nm laser diode for single mode fibers − 1550 nm laser diode for single mode fibers over extended range. The laser diode has an internal temperature control circuit to compensate for ambient temperature changes. • FOM-E3 and FOM-T3, high FEATURES speed modems, convert the • Immunity is provided against electrical signal into an optical electrical interference such as signal for transmission over fiber EMI, RFI, spikes and differential • Extends the range of E3, optic cable, providing extended ground loops. The unit protects T3 signals over fiber distance and immunity to against sparking and lightning optic cable up to 70 km environmental interference. At and provides a secure link in (43.5 miles) the remote end, the optical hazardous or hostile signal is converted back into an • Transparent to E3, T3 environments. electrical signal. An adaptive signals equalizer circuit is incorporated • FOM-E3 and FOM-T3, high in order to accommodate various • Conforms with all relevant speed modems, are supplied as distances. ITU series standards standalone units. Special • Two models are available, hardware for mounting one or • Multimode or single mode depending on the electrical two units in a 19" modem rack • laser diode option for standard used: can be ordered separately (see − FOM-E3 for E3 fiber optic extended distances Ordering). modem. • Built-in diagnostics comply − FOM-T3 for T3 fiber optic with V.54 standard SPECIFICATIONS modem (see Ordering) • LED status indicators and a ELECTRICAL DESCRIPTION supervisory port are available for • Transmission Rates indicating system faults on both electrical and optical circuits. E3: 34.368 Mbps • FOM-E3 and FOM-T3, Fiber The supervisory port includes Optic Modems, provide interface T3: 44.736 Mbps two dry contact closures: conversion between standard • Interface − For minor alarms (AIS in electrical signals and a fiber electrical or optical interface) 75, unbalanced optic signal. − For major alarms (low level at Conversion is provided for: • Zero Suppression the electrical interface or − E3 (34.368 Mbps) High Bit Error Rate at the E3: HDB-3 − T3 (44.736 Mbps) optical interface). T3: B3ZS • FOM-E3 and FOM-T3 comply • A front panel switch is provided • Connectors with ITU standards G.703, G.921 for operating diagnostic loops. and G.956. The electrical Two BNC connectors Two loops are available: interface includes circuits for − Local loopback recovering data and clock − Remote loopback. according to ITU G.703. FOM-E3, FOM-T3 High Speed Fiber Optic Modems for E3, T3 OPTICAL • AIS Signaling ORDERING All “1" signaling at nominal • Operating Wavelength FOMT3/*/& frequency of 50 ppm is sent to ± 850, 1300 nm, or 1550 nm T3 Fiber Optic Modem, the electrical interface at the (see Ordering) standalone unit local unit in the event of an FOME3/*/& • Connectors optical-signal loss. When the E3 Fiber Optic Modem, electrical interface input level is ST or FC (see Ordering) standalone unit “LOW", all “1" signaling is sent to • Output Power the optical output * Specify optical interface: 850 nm: • Supervisory Port ST85 for 850 nm multimode, -18 dBm over 62.5 / 125 Dry contact, via 9-pin, D-type ST connector 1300 nm: connector for minor or major FC85 for 850 nm multimode, -18 dBm over 9.0 / 125 alarms. FC-PC connector 1300 nm laser: Major alarms are LOW or ERR; ST13 for 1300 nm single mode, -12 dBm over 9.0 / 125 Minor alarms are AIS. 1550 nm laser: ST connector The dry contact operates as -12 dBm over 9.0 / 125 FC13 for 1300 nm single mode, normally open or normally FC-PC connector • Receiver Sensitivity closed, using different pins of the ST13L for 1300 nm single mode, supervisory port 850 nm: -28 dBm laser diode, ST connector 1300 nm: -33 dBm • Power FC13L for 1300 nm single mode, 1550 nm: -33 dBm 100/115/230 VAC (10%) laser diode, FC-PC connector 47 to 63 Hz; 6W (max); • Dynamic Range ST15L for 1550 nm single mode, 42-57 VDC laser diode, ST connector 28 dB (130 mA at 48 VDC) FC15L for 1550 nm single mode, GENERAL • Physical laser diode, FC-PC connector • Indicators & Specify power supply: Height: 4.4 cm / 1.7 in (1U) Width: 19.4 cm / 7.6 in 100 for 100 VAC Power: ON when unit is Depth: 24.3 cm / 9.6 in 115 for 115 VAC powered (Green) Weight: 1.6 kg / 3.5 lb 230 for 230 VAC Optical: AIS: ON when all “1" string is 48 for -48 VDC • Protection received at the fiber optic link RM-9 AC/DC over voltage protection connection circuits are connected via Mechanical adapter for mounting one ERR: ON when Bit Error Rate transformers to transmit and or two standalone units in a 19" rack. -6 is 10 or worse receive lines Electrical: • Environment LOW: ON when electrical interface input level is below Temperature: 0-45°C / 32-113°F the G.703 electrical level Humidity: up to 90%, AIS: ON when all “1" string is non-condensing received at the electrical interface APPLICATION 282-100-07/98  1998 RAD Data Communications Ltd. Specifications are subject to change without prior notice.