Black Box G703-V.35 User Manual

81043 1.

G703/V.35 and X.21 Microconverter

MicroConverter G.703-X.21

TT

Clock

Loop

Back

Power

Network

Clock

Master

Get the performance of 2.048 Mbps E1 lines without the expense of a top-end router.

Key Features:

G.703 to X.21

G.703 to V.35

G.703 to EIA-530/RS-449

Simple configuration

Unbalanced (coax) G.703

Balanced (twisted-pair) G.703

Overview:

The Black Box MicroConverter
G.703 enables the connection of
data communication to carrier
services, or private services,
such as microwave links, that
are presented as G.703 at
2Mbit/s.
Many low-end routers currently
on the market are able to handle
2 Mbit/s throughput, but are
only available with conventional
DTE interfaces, X.21 or EIA530.
By combining one of these
routers with the MicroConverter
G.703 users gain the high­performance of 2 Mbit/s
without the expense of a high­end router.
The standard model, the
MicroConverter G.703/X.21,

supports X.21 DTE. The
enhanced version, the
MicroConverter G.703/V.35,
can support both X.21 and
V.35 DTE. Both versions
support 75-ohm un-balanced
and 120-ohm balanced
termination of a G.703
network. For RS-449 or
EIA-530 operation the relevant
adaptor cable most be used
with the MicroConverter
G.703/X.21.

81043 2.

Typical Application:

Connect your Cisco routers’ X.21 interface to your 2 Meg leased line.

Technically Speaking:

The MicroConverter G.703 comes pre-configured for 75-ohm unbalanced operation. Connection to the 75-ohm
unbalanced G.703/E1 network is achieved through connection using the two BNC connectors on the rear panel of
the unit.
For use on a 120-ohm balanced service then the connections should be made using the RJ-45 connector on the rear
panel of the unit. As the units’ default set-up is for 75-ohm, the correct setting should be made on the switch bank
for 120-ohm balanced operation.
The data transmitted and received on the G.703 side of the MicroConverter G.703 could have originated on another
piece of equipment. It is not uncommon for the data to be inverted by G.703 terminating equipment. The
MicroConverter G.703 has the option to invert or not invert the data transmitted and received on the G.703 port.

Specifications:

Cables – Mains lead; Adaptors required for V.35,

RS-449, and EIA-530

Speed – 2.048 M-bps +/- 50 ppm

Standards – E1 G.703 (unframed), X.21, V.35,
RS-449, V.36, EIA-530

Interfaces – (1) G.703 on dual-coax (75 ohm), (1)
G.703 on RJ-45 (120 ohm) switch-selectable, X.21,
V.35, EIA-530, and RS-449 via DB15 F connector

Connectors – (1) DB15 F, (2) BNC (coax) F

Indicators – (5) LEDs: Power, Network, Clock

Master, Loopback, Terminal Timing

Power – Internal, 230 VAC, 50 Hz, IEC320 input connector

Size – 4.5H x 19.5W x 13.8D cm

Weight – 1 kg

Temperature – 5 to 45°C
Relative Humidity – 10 to 90% (non-condensing)

The Complete Package:

MicroConverter Unit
User Guide
Mains Lead