FREEDOM OF COMMUNICATION
USER MANUAL
G.703 / FastEthernet Interface Converter
TAHOE 283
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1. Introduction
®
Tahoe 283 converter allows connecting of two LANs through an
E1 line terminated with balanced G.703 interfaces.
Converters work as transparent bridges, that is both
interconnected networks appear as a single LAN, as if both were plugged
into the same Ethernet switch.
Converter automatically learns, which Ethernet addresses are
heard on one and which on the other side. As a result local traffic is not
sent through the WAN link - converter discovers packets destined for the
other LAN and only those are directed to the G.703 interface.
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2. Interfaces
2.1. G.703 Interface
The G.703 interface is equipped with a RJ-45 connector having
following pinout:
The RX+ pin of the converter should be connected to the TX+ pin
of the other device, the RX- pin to the TX- pin, TX+ to RX+ and TX- to RX-
2.2. Ethernet Interface
The Ethernet interface is used to connect the converter to the
LAN. It may work at 10 or 100 Mbps and in either half or full duplex mode.
The choice between these modes is done automatically.
Converter should be connected to a switch using a straight patchcord and to a PC or a router using a cross-over patch-cord.
Pin
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Signal
RX +
RX -
TX +
TX -
power
switch
power
connector
Ethernet G.703
O
I
Rear view of the converter
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2.2
2.1
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3. Status LEDs
On the front panel there are four LEDs indicating device status:
¡ WAN Link - when lit, indicated synchronization to the other
G.703 device
¡ WAN Act - blinks to signal the activity of the G.703 port
¡ LAN Link - when lit, indicates proper Ethernet connection
between the converter and the switch or other device
¡ LAN 100M - when lit, indicates successful negotiation of 100
Mbps transfer rate on the Ethernet port
¡ LAN Act - blinks to signal the activity of the Ethernet port
4. Technical Data
¡ processor:
ARM
¡ memory:
8 MB SDRAM
¡ MAC table size:
10 000 entries, automatic entry removal after 30s
¡ G.703 port:
unframed, 2048 kbps
balanced, 120W
HDB3 line coding
-43 dB receiver sensitivity - up to 2000m reach
¡ dimensions:
200 mm (width) x 130 mm (length) x 45 mm (height)
¡ power supply:
15V, 400mA
external power supply included
¡ environmental conditions:
storage: temperature -20°C to 65°C
humidity 5 to 95%
operation: temperature 0°C to 50°C
humidity 0 to 85%
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5. Declaration of Conformity
We declare that the product Tahoe 283 complies with the
regulations of the following European Directives:
¡ 73/23/EEC low voltage safety requirements
¡ 89/336/EEC EMC requirements
¡ 99/5/EEC radio & telecommunication terminal
equipment requirements
The compliance of Tahoe 283 with the requirements of the above
mentioned directives is ensured by complete application of the following
harmonized European Standards:
¡ EN 60950:2000
¡ EN 55022:1998
¡ EN 61000-6-1:2002
¡ EN 61000-6-3:2002
Signed: Piotr Kaczmarzyk
Position: Director
Signature:
Date: 2 Feb 2004
Place: Wroclaw, Poland
TAHOE
Piotr Kaczmarzyk
ul. Uniwersytecka 1
50-951 Wroclaw, Poland
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®
TAHOE
Uniwersytecka 1
50951 Wroc³aw, Poland
phone +48 50 100 7362
fax +48 71 344 2642
http://www.tahoe-group.com/
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