Inhaltszusammenfassung zur Seite Nr. 1
146_N.qxd 9/11/05 11:11 AM Page 2
Miniature Modems
12
Miniature short range modems offer the What is the difference between
Miniature short range modems
same communications functions as AC- interface-powered and AC-powered
offer a simple, low cost and highly
powered modems but with fewer features, modems?
such as limited diagnostics capability and no
reliable method to connect digital Interface-powered and AC-powered
BER tests. Usually they operate over shorter
modems perform the same basic
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M INIATUR E SHORT RANG E M ODE M S 147-151_N.QXD 9/11/05 11:12 AM Page 1 M INIATURE SHORT RANGE M ODE M S 12 CMN-16 Compact Modem Nest The following cards are available: CMN-CF8 – sync/async fiber optic modem card with V.54 loops, compatible with • High density modem rack CMN-C6A – dual async short range modem FOM-8 card, compatible with SRM-5A, SRM-6A, • 2U high SRM-3A CMN-C11 – async short range modem card • Accommodates copper and fiber optic with V.54 loops, compatible with ASM-11, CMN-
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147-151_N.QXD 9/11/05 11:12 AM Page 2 M INIATURE SHORT RANGE M ODE M S SRM-31S Miniature Multirate 2-Wire Modem The SRM-31S miniature synchronous and monitoring. When the ASMi-31 is a card modem operates full duplex over a single in the LRS-24 rack, the SNMP central • Full duplex transmission over 2 wires in pair of wires. It supports data rates from management station can perform control synchronous transmission 1.2 kbps to 128 kbps. The transmission and monitoring of the remote SRM-31. • Da
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M INIATUR E SHORT RANG E M ODE M S 147-151_N.QXD 9/11/05 11:12 AM Page 3 M INIATURE SHORT RANGE M ODE M S 12 SRM-5A, SRM-6A, SRM-6L Asynchronous Short Range Modems 4-wire 19.2 kbps with a range of 4.5 km (2.8 miles) SRM-6A SRM-5A Async at 9.6 kbps. The SRM-6L operates at data • SRM-5A/6A: 4-wire, full duplex Async terminal rates of up to 19.2 kbps up to a range of computer SRM-6L: 4-wire, full or half duplex 3.2 km (2 miles). • Internal filter for high noise immunity The SRM-5A modem is avai
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147-151_N.QXD 9/11/05 11:12 AM Page 4 M INIATURE SHORT RANGE M ODE M S SRM-5S Synchronous Short Range Modem The miniature SRM-5S is a short range a 5-screw (4-wire and ground) terminal modem connecting full duplex synchronous block for the line. • 4-wire, full duplex terminals, controllers and computers. It The SRM-5S has both a terminal block and • Selectable data rates up to 19.2 kbps operates at nine data rates up to 19.2 kbps. an RJ-45 or RJ-12 line connector. • Range up to 5 km (3.0 mile
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M INIATURE SHORT RANGE M ODE M S / M INIATURE FIBER 0PTIC M ODE M S 147-151_N.QXD 9/11/05 11:12 AM Page 5 M INIATURE SHORT RANGE MODEMS/ M INIATURE FIBER 0PTIC M ODE M S 12 SRM-3A Ultra-Miniature Async Short Range Modem The SRM-3A is an ultra-miniature signals. The modem will operate fully even if • RS-232/V.24 on 9-pin connector asynchronous short range modem connecting only Transmit Data is connected, i.e., full duplex asynchronous terminals to without any control signals. • 4-wire, full du
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152-155_N.QXD 9/11/05 11:12 AM Page 2 M INIATUR E FIBER OPTIC M ODE M S FOM-9 Sync/Async High Speed Fiber Optic Modem The FOM-9 is a miniature sync/async fiber When set to asynchronous mode, the optic modem operating full or half duplex modem internally converts the transmission • Selectable sync or async operation over fiber optic cable. It has a range of to synchronous format, in compliance with • Selectable data rates from 9.6 kbps to 15 km (9 miles) over single mode fiber and the ITU V.1
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M INIATUR E FIBER OPTIC M ODE M S 152-155_N.QXD 9/11/05 11:12 AM Page 3 M INIATUR E FIBER OPTIC M ODE M S 12 FOM-8 Sync/Async Fiber Optic Modem • Selectable sync or async operation • V.54 diagnostics • Selectable data rates up to 19.2 kbps Fiber optic cable • Two versions: single mode and multimode FOM-8 FOM-8 • Range up to 15 km (9 miles) over single mode fiber • Carrier-controlled for transfer of control signal The FOM-8 has diagnostic capabilities standard. Different async formats are • No
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152-155_N.QXD 9/11/05 11:12 AM Page 4 M INIATUR E FIBER OPTIC M ODE M S FOM-6AV High Speed Fiber Optic Modem • Asynchronous transmission up to 57.6 kbps • Supports any type of asynchronous Fiber optic cable characters with no need for configuration FOM-6AV FOM-6AV Async • Transmission range up to 16 km (10 miles) Host terminal over single mode fiber • Full or half duplex • Continuous or controlled carrier Transmission over fiber ensures data operate without external power, by drawing integrit
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M INIATUR E FIBER OPTIC M ODE M S / M ODE M ELI M INATO RS 152-155_N.QXD 9/11/05 11:12 AM Page 5 M ODE M ELI M INATO RS 12 MME, MME/V.35 Replaces Two Sync Modems of 100 m (330 ft) on each side. MME Three models are available: • Data rates operates at selectable data rates up to 19.2 • MME requires no external power supply, MME: selectable up to 19.2 kbps kbps. MME/V.35 operates at 56/64 kbps, drawing low power from the data and MME/V.35: 56/64 kbps replacing high speed modems. control sig
