RAD Data comm 4-Wire Symmetrical VDSL Modem ASM-60 Instrukcja Użytkownika Pobierz pdf (Strona 15)

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RAD Data Communications 2009 Catalog

M I N I A T U R E F I B E R M O D E M S

host. Transmission range (regardless of the data

rate):

•

3.5 km (2 miles) using 850 nm multimode fiber

•

30 km (18 miles) using 1310 nm single mode

fiber

•

46 km (28 miles) using 1310 nm laser diode

single mode fiber

The FOM-6MP contains two optical interfaces

and one V.24/RS-232 port. One optical interface

passes data to and from the host while the

other passes data to and from the rest of the

terminals in the chain. The V.24/RS-232 interface

is connected to the local terminal.

Terminal contention for transmission to the host

is selectable: transmitting data or raising RTS

signal.

The FOM-6MP includes anti-streaming protection,

which prevents blockage of data transmission. The

FOM-6MP disables a port that blocks the polling

for a preset, user-selectable period of time.

LED indicators help the user to easily isolate

faulty segments along the chain of terminals.

The FOM-6MP requires an external DC power

supply of 10–30 VDC/500 mA.

FOM-6MP

Async Fiber Optic Multipoint Modem

RS-232

Host

Fiber optic

Remote terminal units

FOM-6MP/SL

FOM-6MP/DL FOM-6MP/DL

FOM-6MP/DL

•

Asynchronous transmission up to

38.4 kbps

•

Multidrop operation over a fiber link

•

Transmission range up to 46 km

(28 miles) over single mode fiber

•

RTS or data contention for multipoint

operation

•

Automatic disabling in the event of

streaming

•

Variety of optical options, including:

multimode, single mode and laser diode

for extended range

For latest updates visit www.rad.com

The FOM-6MP async fiber optic modem operates

over fiber to connect remote terminals and

computers, connected in multidrop, to a central

FOM-5A, FOM-6A

Asynchronous Fiber Optic Modems

•

Asynchronous transmission up to

19.2 kbps

•

Transmission range up to 3 km

(1.9 miles) over multimode fiber

•

Full or half duplex

•

Continuous or controlled carrier

•

DCE/DTE switch

•

LED indicator for data transmit

•

No external power required

•

Optional metal case (FOM-6A only)

•

Available as a card for 19-inch rack

FOM-5A and FOM-6A are miniature fiber optic

modems used for local data distribution,

connecting full or half duplex async computers

and terminals. A pair of modems ensures

integrity of data transmission over multimode

fiber optic cables for distances up to 3 km

(1.9 miles) at data rates up to 19.2 kbps.

The FOM-5A is a sub-miniature version of the

FOM-6A, offering all the features in half the size.

Innovative circuitry allows the modems to

operate without external power, by drawing low

power from the DTE data and control signals.

The FOM-5A and FOM-6A have a V.24/RS-232

interface and are available with either a male or

female integral 25-pin connector.

FOM-6A

Async

computer

Async

terminal

FOM-5A

Fiber optic cable

For latest updates visit www.rad.com

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