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185
RAD Data Communications 2009 Catalog
T D M C O N V E R T E R S / M I N I A T U R E C O N V E R T E R S
SPD-703-1
G.703 Codirectional Rate and Interface Converter
The SPD-703-1 rate and interface converter
transfers between the G.703 interface and
other data communications interfaces.
The SPD-703-1 codirectional converter converts
the ITU G.703 64 kbps codirectional interface to
V.35, V.36/V.11, X.21/V.11, RS-530 or V.24.
Operating full duplex at a transmission rate of
64 kbps, the SPD-703-1 has a range of
800 meters (0.5 miles) from the G.703
equipment. It has a built-in BERT complying with
the V.52 standard that provides fault isolation
capability with the activation and monitoring
performed via the front panel.
V.54 diagnostic capabilities provide local analog,
local digital and remote digital loopbacks. These
may be activated from the front panel or via the
interface control signal.
The SPD-703-1 is available as a standalone unit
that can be mounted in a 19-inch rack, or as a
card for the ASM-MN-214 rack.
BE-1
Coax-to-Twisted Pair Converter (Balun) for E1
Channel
bank
Channel
bank
V.35 V.35
SPD-703-1
G.703
codirectional
64 kbps
RouterRouter
PCM
Network
SPD-703-1
The BE-1 coax-to-twisted pair converter (balun)
enables any E1 equipment with an unbalanced
(coax) interface to operate over a twisted pair
connection instead of over more expensive coax
cables.
The BE-1 enables any E1 or ISDN equipment
with a balanced twisted pair interface to use
existing coaxial cables.
The BE-1 is a miniature, lightweight balun that
operates without AC or DC power and provides
insulation of up to 100V.
PBX
BE-1
BNC
BNC
E1
4-wire
Twisted pairs
•
Interface conversion between G.703
(64 kbps) and V.35, V.36/RS-422,
RS-530, or X.21
•
Selectable data rates: 48, 56 or 64 kbps
•
Selectable transmit timing source
•
Analog and digital loopback
•
56 kbps to 64 kbps rate conversion
complies with V.110
•
Conversion between coax cables and
twisted pairs for E1 G.703 applications
(2.048 Mbps)
•
Miniature, lightweight balun
•
No AC or DC power required
•
Immediate installation
•
Not sensitive to the direction of the
signals
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