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RAD Data Communications 2009 Catalog
S H A R I N G D E V I C E S / F I B E R T E L E P H O N E E X T E N D E R S
RSD-1, RSD-10
4, 8-Channel Programmable Sharing Devices
F-TEL/SUB
F-TEL/CO
Fiber optic
50 km
(31 miles)
PBX
PSTN
The RSD digital sharing devices enable any
combination of DCEs and/or DTEs to share a
modem, multiplexer or computer port in a
multipoint environment. RSD-1 supports up to
four DCEs/DTEs; RSD-10 supports up to eight.
They are completely transparent to the system
and the data, and operate with sync or async
equipment. The units generate timing signals
internally or operate with external clocks, either
from the main channel or from subchannel 1.
The main channel broadcasts information to all
subchannels in parallel. Subchannels contend to
transmit to the main channel by activating RTS/
DCD or by data transitions.
The devices can be configured to automatically
disable any channel that stays active for longer
than a preset time and blocks all other
subchannels.
Permanent disabling of a subchannel is possible
by setting the front panel switches.
Installation and configuration of the RSD units
are easy. All necessary crossover connections
are defined internally via a DCE/DTE switch, and
only straight-through cables are used to connect
the modems or terminals to the RSD-1 and
RSD-10. The interfaces are RS-232/V.24 and the
connectors are 25-pin D-type, female.
The F-TEL fiber optic telephone adapter enables
telephone connection to a central office PBX
over a fiber optic link. The fiber optic link
secures voice communications and blocks
tapping. Two models are available:
F-TEL/CO for direct connection to a central
office PBX.
F-TEL/SUB for direct connection to a subscriber
telephone set. The product supports both DTMF
and pulse dialing.
The F-TEL can operate over the common types
of fiber optic cables. It supports 850 nm,
1310 nm and 1550 nm optical interfaces. The
laser options are used to extend the range up to
50 km (31 miles).
As a backup to the AC power supply, the F-TEL
can be powered by an optional NiCad
rechargeable battery. Using the backup battery,
the product provides better immunity against
wiretapping.
The F-TEL is available as a standalone unit. A
special mechanical adapter can be used for
mounting one unit or two units side-by-side in
a 19-inch rack.
F-TEL
Fiber Optic Phone Adapter
RSD-1/10
Modem
Modem
Modem
Modem
19.2 kbps
4/8 channels
•
RSD-1: four subchannels; RSD-10: eight
subchannels
•
Any combination of modems (DCEs) and
terminals (DTEs)
•
Sync or async, data rates up to
19.2 kbps
•
RS-232/V.24 interface
•
Automatic disabling of streaming
subchannel
•
Operates with dial-up or leased line
modems
•
Internal or external clocks
•
Provides secure connection of voice
communications over fiber optic links
•
Extends the range of telephone
transmission up to 50 km (31 miles)
•
Supports direct subscriber or PBX
connections
•
Supports both DTMF and pulse dialing
•
Optional rechargeable nickel cadmium
backup battery for up to three hours of
operation
•
Lightning protection for use in rural
environments
For latest updates visit www.rad.com
For latest updates visit www.rad.com
(13 Seiten)
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