RAD Data comm FOMi-T1 Manual de usuario descargar pdf (Pagina 16)

139

RAD Data Communications 2011 Catalog

FIBER MODEMS/COPPER MODEMS

•

Wide range of selectable data rates –

19.2 kbps up to 256 kbps

•

Synchronous or asynchronous data

transmission

•

Range up to:

– 8 km (5 miles) for 850 nm multimode

– 25 km (15.5 miles) for 1310 nm single

mode

– 60 km (37.5 miles) for 1310 nm laser

diode

– 140 km (87 miles) for 1550 nm laser

diode

•

Digital interfaces: V.24 (up to 64 kbps),

V.35, X.21, RS-530, V.36/RS-449,

Ethernet (bridge), and G.703 codirectional

•

V.54 diagnostics and built-in BER tester

FOM-20

Sync/Async Fiber Optic Modem

The FOM-20 is a sync/async fiber optic modem

operating full or half duplex over fiber optic

cable. It has 16 selectable data rates from

19.2 kbps up to 256 kbps. Four rates are for

asynchronous transmission and 11 rates are for

synchronous transmission (19.2 kbps is for both

sync and async).

The FOM-20 can operate over single mode or

multimode fiber using 850 nm or 1310 nm LEDs

and 1310 nm or 1550 nm laser diodes.

The main application for the FOM-20 is point-to-

point fiber links at ranges longer than any copper

modem can achieve, in noisy environments or

when security is a primary concern.

The FOM-20 features V.54 diagnostics to

perform local analog/digital and remote digital

loopbacks. Loopback commands are controlled

either by a manual switch or via the DTE

interface signals. The FOM-20 includes a built-in

BER tester, which is activated by a front panel

switch and generates a 511 pseudo-random

test pattern according to the V.52 standard.

FOM-20FOM-20

Fiber optic cable

Up to 140 km

(87 miles)

19.2 kbps

For latest updates visit www.rad.com

PFH-4

Power Feeding Hub

•

Remote power feeding of up to four

SHDSL wire pairs (four x 2-wire or two x

4-wire)

•

Output power feeding options per line:

120 VDC @60 mA or 180 VDC @60 mA

•

Terminal block connectors for each line

input and output

•

Current limit protection for each

channel (line and earth)

•

DIP switch allows for selective control

for each wire pair

•

LED line status indicators

•

Dry contact connectors for alarms

•

All connectors on front of 1U-high, half

19-inch metal enclosure

Although SHDSL modems provide superior reach

in comparison with other DSL technologies, the

maximum range of standard SHDSL modems is

still not sufficient for some longer-range

applications, such as those along railways or

pipelines. In such cases, SHDSL repeaters are

employed to duplicate and retransmit the signal.

To simplify deployment and save the cost of

laying power lines, repeaters can operate on a

remote power feeding source. In other words,

they can be powered over the same lines that

carry the data traffic. RAD’s PFH-4 is a remote

power feeding hub designed especially to

support long range SHDSL applications. It

delivers power and data for up to four SHDSL

wire pairs (four x 2-wire lines or two x 4-wire

lines), eliminating the need for local power

sources for modems or repeaters on the line.

The hub runs on 48 VDC power and can supply

an output of 120 VDC or 180 VDC to each line.

Each SHDSL wire pair is input to the PFH-4,

which then adds power to the original data

signal. This power output feeds the repeaters

on the line, which retransmit the data signal.

Separate terminal block connectors are provided

for easy connection of the input and output of

each wire pair.

All lines are protected from overload, short-

circuiting and leakage to earth. At overload, a

current-limiter drops the line, activates an LED

alarm and initiates an auto-restart recovery.

Dry contacts relay major and minor alarm

warnings via a DB-9 connector.

Front panel LEDs indicate the power feeding

status for each line and provide warnings for

current and temperature overload conditions.

An external DIP switch allows selective power

feeding for each individual line.

For latest updates visit www.rad.com

1 2 ... 11 12 13 14 15 16 17 18

Comentarios a estos manuales

Sin comentarios

RAD Data comm FOMi-T1 Manual de usuario Pagina 16

Comentarios a estos manuales

Relacionado con productos y manuales para Redes RAD Data comm FOMi-T1