1. Introduction
Galaxy 4100 is a broadband Ethernet gateway that converts electrical and protocol
conversion between data from 4 x E1/T1 to Ethernet 10 BaseT interface. Galaxy 4100
supports E1/T1 framed modes with different line codes plus line build-out (LBO) capability.
This provides for the user with various Ethernet LAN services (Video Conferencing, VOIP,
Routing, etc.) through four E1/T1 connections at a maximum data rate of 8Mbps. Any one
of E1/T1 disconnection will result in individual E1/T1 signal loss with LED indication, and
Galaxy 4100 will still maintain the WAN connection via the rest of E1/T1 connections.
2. Features
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Support E1/T1 Framed modes
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Bridging capabilities for Ethernet 10 BaseT interface
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10 LEDs for status monitoring
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DIP switches for configurations / settings
3. Packing Contents
Inside the package you should find:
(1) One Galaxy 4100: Dimension: 427x247x43 (mm)
(2) One power cord
(3) One User’s Manual
Please check if the packing is damaged before unpacking or any component is missing. If so,
please contact the manufacturer.
4. Installation
1. Unscrew the front panel and pull out the board. Select the right configurations for E1/T1
interface via DIP switches. Then slide the board back into the slot and screw.
2. Connect E1/T1 lines to DS1 connectors (Tip/Ring) on the front panel of Galaxy 4100.
3. Connect LAN switch to RJ-45 connector of Galaxy 4100 using Category 3 or Category 5.
4. Connect the power cord to the AC outlet.
5. Turn on the power switch.
To construct a transmission loop please note:
If the LINK signal for connection is not lit, then unscrew and pull out the board and you may
find that there is a “Cross” switch on the back of the motherboard. Adjust the setup and put
the board back into the case. Then, check if the LINK signal is lit. If not, please consult to
the dealer or manufacturer.
5. Front Panel LED Indicators
There are 10 LED indicators for G4100 to indicate operation status.
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POWER (Green)
When the power LED is lit, it indicates that the power is ON.
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SQ (Green)
When it is lit, at least one of the 4 x E1/T1 is in connection.
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LINK (Green)
When it is lit, the Ethernet LAN is in normal connection.
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WAN (Green)
When it is flashing, it indicates data transmission to E1/T1
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LAN (Green)
When it is flashing, it indicates data transmission to Ethernet LAN.
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Test (Yellow)
When it is flashing, it indicates that the G4100 is in self-testing.
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LOS1 (Red)
When it is lit, the 1st E1/T1 connection is in state of loss of signal.
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LOS2 (Red)
When it is lit, the 2nd E1/T1 connection is in state of loss of signal.
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LOS3 (Red)
When it is lit, the 3rd E1/T1 connection is in state of loss of signal.
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LOS4 (Red)
When it is lit, the 4th E1/T1 connection is in state of loss of signal.
6. Pin Assignment of RJ48 Connector for T1/E1 interface
Pin 1 Pin 8
T1/E1 Pin Assignment
1 RxRing
2 RxTip
4 TxRing
5 TxTip
