Table B. Framing mode
SW1-1 SW1-3 SW1-4 Line Code
OFF OFF OFF E1 Unframed
OFF ON OFF E1 CRC4
OFF OFF ON E1 CAS
OFF ON ON E1 CRC4+CAS
ON OFF OFF T1 Unframed
ON ON OFF T1 SF
ON OFF ON T1 ESF
Table C. Line code
SW1-1 SW1-5 Line Code
OFF OFF HDB3
OFF ON AMI
ON OFF B8ZS
ON ON AMI
Table D. DS-1 LBO and DSX-1 Transmit Pulse Template
SW1-1 SW1-6 SW1-7 SW1-8 SW2-1 E1 or DS1/DSX-1 LBO
OFF X X X X E1
ON OFF OFF OFF OFF DS-1 0 dB LBO
ON ON OFF OFF OFF DS-1 7.5 dB LBO
ON OFF ON OFF OFF DS-1 15.0 dB LBO
ON ON ON OFF OFF DS-1 22.5 dB LBO
ON X X ON OFF DSX-1 0~133 feet
ON X X OFF ON DSX-1 133~266 feet
ON OFF OFF ON ON DSX-1 266~399 feet
ON ON OFF ON ON DSX-1 399~533 feet
ON X ON ON ON DSX-1 533~655 feet
G1200S
Fractional E1/T1 To LAN Gateway
User Manual
Ver 1.1
Yoda Communications, Inc.
1. Introduction
Galaxy G1200S is a broadband gateway, which converts protocols and data from
Fractional E1/T1 to Ethernet 10/100 BaseT interfaces. A pair of Galaxy G1200S can
thus make an Intranet bridge connection at Nx64Kbps through E1/T1 network. Galaxy
G1200S provides an E1/T1 interface, and support E1/T1 framed and unframed modes
with different line codes plus line build-out (LBO) capability.
G1200S is indeed an ideal symmetrical broadband solution for Intranet LAN-to-LAN
connection with Nx64Kbps bandwidth. This provides for the user with various Ethernet
LAN services (e.g. Video Conferencing, Routing, etc.) through Fractional E1/T1 network.
2. Features
z Support Fractional E1/T1 Framed and Unframed modes
z BNC connectors for E1 unbalanced 75 ohm
z RJ-48 connector for E1 balanced 120 oh m and T1 balanced 100 ohm
z Ethernet Auto-Detection for 10/100 BaseT and Half/Full duplex
z Ethernet Auto MDIX function for auto Tx/Rx swap
z 6 LED indicators for status monitoring
z Dip switches for configurations & settings
3. Packing Contents
Inside the package you should find:
(1) One G1200S with dimension of 260x1 51x44 (mm)
(2) One power cord
(3) One Cat 5 Ethernet LAN cable
(4) One E1/T1 RJ-48 to Y-connector cable
(5) One user’s manual
Please check if the packing is damaged before unpacking or any component is missing.
4. Installation
1. Select the Fractional E1/T1 interface configurations via SW1~SW7 dip switches.
2. Connect E1/T1 line to the BNC or RJ-48 connectors on the back panel of G1200S.
3. Connect the Ethernet cable to the RJ-45 LAN connector of G1200S.
4. Connect the power cord to the AC outlet, or Screw the -48V DC power.
5. Turn on the power switch.
6. The LED indicators of E1/T1 and LAN should be lit, and the LAN indicator will flash
to show the data activity of Ethernet. The LED indicator of LOS will be RED lit, when
E1/T1 is in Loss of Signal.
5. Front Panel LEDs
z POWER: G1200S power is ON.
z E1: “ON” indicates that E1 is selected (SW1-1 is OFF)
z T1: “ON” indicates that T1 is selected (SW1-1 is ON)
z LOS: “ON” indicates Loss of Signal for selected E1/T1
z 10/100M “ON” indicates Ethernet is in 100M connection
z LAN: “ON & Flashing” indicates a normal LAN connection / data activity
6. DIP Switches
DIP Switches OFF ON Functions
SW1-1 E1 T1 E1/T1 Selection
SW1-2 See Table A See Table A IMPEDANCE
SW1-3 See Table B See Table B FRAME MODE
SW1-4 See Table B See Table B FRAME MODE
SW1-5 See Table C See Table C LINE CODE
SW1-6 See Table D See Tabl e D LBO
SW1-7 See Table D See Tabl e D LBO
SW1-8 See Table D See Tabl e D DSX-1
SW2-1 See Table D See Tabl e D DSX-1
SW2-2 Reserve
d
Reserve
d
Reserve
d
SW2-3 Reserve
d
Reserve
d
Reserve
d
SW2-4 Reserve
d
Reserve
d
Reserve
d
SW2-5 Nx64 Nx56(For T1 only)64K/56K Channel
SW2-6 Full T1/E1 Fractional T1/E1 FRACTIONAL
SW2-7 All Zeros All Ones Stuff bits
SW2-8 Internal. External. E1/T1 Clock Mode
Table A. E1/T1 Impedance
SW1-1 SW1-2 Impedance
OFF ON 75 Ohms
OFF OFF 120 Ohms
ON OFF 100 Ohms
ON ON 100 Ohms
Table E. Fractional T1 (24 Channels) Selections
Fractional
T1 SW4-1 SW4-2 SW4-3 SW4-4 SW4-5 SW4-6 SW4-7 SW4-8
Channel
No.
1 2 3 4 5 6 7 8
SW5-1 SW5-2 SW5-3 SW5-4 SW5-5 SW5-6 SW5-7 SW5-8
Channel
No.
9 10 11 12 13 14 15 16
SW6-1 SW6-2 SW6-3 SW6-4 SW6-5 SW6-6 SW6-7 SW6-8
Channel
No.
17 18 19 20 21 22 23 24
Note: Dip switch “ON” means selected, and “OFF” means unselected.
Table F. Fractional E1 (31 Channels) Selections
Fractional
E1
SW4-1 SW4-2 SW4-3 SW4-4 SW4-5 SW4-6 SW4-7 SW4-8
Channel
No.
OFF 2 3 4 5 6 7 8
SW5-1 SW5-2 SW5-3 SW5-4 SW5-5 SW5-6 SW5-7 SW5-8
Channel
No.
9 10 11 12 13 14 15 16
SW6-1 SW6-2 SW6-3 SW6-4 SW6-5 SW6-6 SW6-7 SW6-8
Channel
No.
17 * 18 19 20 21 22 23 24
SW7-1 SW7-2 SW7-3 SW7-4 SW7-5 SW7-6 SW7-7 SW7-8
Channel
No.
25 26 27 28 29 30 31 32
Note: 1. Dip switch “ON” means selected, and “OFF” means unselected.
2. User needs to open the case to use dip switches SW4~SW7.
3. SW4-1 (Channel 1) is NOT available, and must be set “OFF”.
4. SW6-1 (Channel 17) can be selected “ON” only when E1 CRC4
framing mode is selected.
5. SW4~SW7 dip switches defaults are set “OFF”.
RJ-48 Connector Pin Assignment for E1/T1 interface:
Ethernet to Ethernet Connection over E1 Network
Yoda Communications, Inc.
Headquarters：
2F, No. 3- 1, I n dustry East Road IX, Science Based Industrial Park
Hsin Chu, 300, Taiwan
Tel：+886-3-5632323 Fax：+886-3-5636420
Web Site： www.yoda.com.tw
E-mail： sales@yoda.com.tw
S/N: 6080701000
Pin4 & Pin5 (to input of outer equipment)
Pin1 & Pin2 (to output of outer equipment)
E1 Network
Ethernet
Bridge
Ethernet
Bridge
G1200S
G1200S
Loading...