INV-4E1
Ethernet over 4 - E1
Interface Converter
User’s Manual
INV-4E1 Interface Converter
Contents
1. PRODUCT OVERVIEW .................................................................................................................................... 2
2. FEATURES ......................................................................................................................................................... 2
3. TYPICAL APPLICATION .................................................................................................................................. 2
4. TECHNICAL SPECIFICATION ........................................................................................................................ 3
4.1 E1 INTERFACE ...................................................................................................... 3
4.2 CONSOLE INTERFACE ........................................................................................... 3
4.3 ETHERNET INTERFACE ......................................................................................... 3
4.4 GENERAL SPECIFICATION ..................................................................................... 3
5. CONFIGURATION ............................................................................................................................................. 4
5.1 FRONT PANEL ....................................................................................................... 4
5.1.1 Labels, LED indictors and dip switches on the front panel are shown in Figure 5-1 below:
........................................................................................................................................................................... 4
5.1.2 LED indicators & dip switches on the front panel are defined as below: ............................ 4
5.2 REAR PANEL ......................................................................................................... 4
5.2.1 Interface and connector on the rear panel are shown in Figure 5-2. .................................... 4
5.2.2 E1 interface 120Ω/RJ-45 definition: ............................................................................................... 4
5.2.3 Balun HighTech HK-5201 RJ-45 Pinout definition: .................................................................... 5
6. INSTALLATION ................................................................................................................................................. 5
7. TROUBLE SHOOTING ..................................................................................................................................... 6
8. ACCESSORIES .................................................................................................................................................. 6
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BYC-C4 Interface Converters
1. Product overview
As a 4E1 to 10/100Base-Tx converter designed to transmit Ethernet data through several E1 channels, INV-4E1 can
conduct point-to-point transmission of Ethernet MAC frame data through one to 4 E1 channels, detect and use the
effective E1 channels automatically, apply the reversed multiplexing technology to bind several E1 circuits together to
transmit Ethernet data at 10/100Mbps, and allow certain transmission time delay between E1 circuits.
This equipment can make efficient use of a large amount of existing E1 circuit sources in the networking to expand
the Ethernet transmission distance and application range. The highest transmission rate of transparent transmission
design for the Ethernet data through one to four E1 circuits is 7.68Mbps. So it is a very good solution for the Ethernet
broadband access, easy to expand the application scope and transmission distance of Ethernet.
INV-4E1 is of high integration, strong reliability, low power, small size and complete function. It’s best advantage is
the broad transmission channel protected well, enabling stable working in bad situation. There is no adjusting point for the
installation of the whole unit, easy to operate and simple to maintain.
2. Features
¾ MII interface comply with IEEE 802.3 protocol standard supports 10M/100M full duplex/semi-duplex working
modes.
¾ Capable of transmitting transparently the ultra long frame, and supports the Ethernet switch with VLAN function.
¾ Built-in dynamic Ethernet MAC address (10,000 addresses) list in the chip and the local data frame filtering
function.
¾ Built-in SDRAM (256K Byte) controller.
¾ E1 interface comply with ITU-T G.703, G.704 and G.823.
¾ E1 interface module contains the built-in clock recovery circuit and HDB3 code circuit.
¾ Supports the availability checking and automatic troubleshooting of 1 to 4 E1 channels.
¾ Visible and audible alarm indication.
¾ Real-time error code monitoring and automatic protection of E1 channels.
¾ E1 line loop back function supported.
¾ Allows the maximum 8ms time-delay of 4 channels, the system can stop to send data automatically when the
time-delay is big.
¾ QFP144 package by 0.35µm CMOS process
3. Typical application
The INV-4E1 is not capable of fractional E1 operation or timeslot assignment. It should be used where only
unframed， transparent 2.048Mbps transmissions are available.
2
4. Technical specification
4.1 E1 Interface
Framing Unframed (transparent)
Line Code HDB3
Bit Rate 2.048Mbps x 4 (7.68Mbps total)
INV-4E1 Interface Converter
Line Impedance 75 Ohms for BNC, 120 Ohms for RJ-45
Relative Receive Level 0 to -43dB
‘Pulse’ Amplitude ±2.37V±10% for 75 Ohms ,3.00V±10% for 120 Ohms
Transmit Frequency 2.048Mhz
Allowance ±50ppm
Interface characteristics Complies with ITU-T G.703
Jitter Performance According to ITU-T G.823
Interface Connectors BNC (Unbalanced) or RJ-45 (Balanced)
4.2 Console interface
The CONSOLE interface is network management interface, and it is limited to be used by manufacturers only.
4.3 Ethernet interface
¾ Interface: 10/100Base-TX, Full Duplex or Half Duplex
¾ Interface Standard: complies with IEEE-802.3u standard
¾ Interface rate: 10/100M auto-negotiation
¾ Interface connector: RJ-45
¾ Supports Auto-MDI/MDIX
4.4 General specification
Environmental
Requirements
Power Supply
Power consumption <10W
Dimension (mm) 265（W）×170（D）×45（H）
Work temperature 0
Humidity ≤90% non-condensing
-48VDC -36VDC ~ -72VDC
220AC 220VAC±20%
3
°C ~ +45 °C
BYC-C4 Interface Converters
5. Configuration
5.1 Front panel
5.1.1 Labels, LED indictors and dip switches on the front panel are shown in Figure 5-1 below: igure 5-1 below:
Figure 5-1 Figure 5-1
5.1.2 LED indicators & dip switches on the front panel are defined as below: 5.1.2 LED indicators & dip switches on the front panel are defined as below:
¾ Description of indicators:
¾ Description of indicators:
LED LED
Color Color ON ON OFF OFF
PWR Green Power supply is on Power is off or disconnected
CH1 Green 1st E1 input signal is ok Loss of 1st E1 input signal
CH2 Green 2nd E1 input signal is ok Loss of 2nd E1 input signal
CH3 Green 3rd E1 input signal is ok Loss of 3rd E1 input signal
CH4 Green 4th E1 input signal is ok Loss of 4th E1 input signal
LINK Green Ethernet port is connection Ethernet port is disconnection
FDX Green Ethernet is full-duplex Ethernet is half-duplex
SPD Green Ethernet speed is 100Mbps Ethernet speed is 10Mbps
TRD Green Ethernet data is transmitted No Ethernet data is transmitted
5.2 Rear panel
5.2.1 Interface and connector on the rear panel are shown in Figure 5-2.
5.2.2 E1 interface 120Ω/RJ-45 definition:
E1 OUT E1 IN
RJ-45 1 (GND) 2 (+) 3 (-) 5 (GND) 6 (+) 7 (-)
Figure 5-2
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INV-4E1 Interface Converter
5.2.3 Balun HighTech HK-5201 RJ-45 Pinout definition: 5.2.3 Balun HighTech HK-5201 RJ-45 Pinout definition:
If you want to use 75ohm/BNC connector, please use the balun. If you want to use 75ohm/BNC connector, please use the balun.
RJ-45 Pinout RJ-45 Pinout Signal Signal Description Description
1 RX- Receive Input, Negative
2 RX+ Receive Input, Positive
3 S1 Transmit Ground
4 TX- Transmit Output, Negative
5 TX+ Transmit Output, Positive
6 S2 Receive Ground
Note:
¾ Power input (PWR): INV-4E1 interface converters support three kinds of voltage, 220VAC, -48VDC and +24VDC.
Please pay attention to the DC input and it’s negative polarities. It is better to use a multimeter to check if the
power polarity and voltage value are according with those marked on equipment.
¾ Ensure to fix a reliable grounding wire at the grounding point on the equipment.
5.3 10/100Base-T interface definition:
Pin 1 2 3 4 5 6 7 8
Function TX+ TX- RX+ NC NC RX- NC NC-
Note: NC means “ no connection available”
6. Installation
Before installing the equipment, check the following conditions.
6.1 Field requirements
Clean and well ventilated.
Dry environment (relative humidity: 20% - 95%, no condensing).
6.2 Power supply
There shall be power supply applicable to the equipment in the installation field.
6.3 Cable Connection
6.3.1 LAN connection
The equipment provides auto MII/MIIX interface in conformity with IEEE 802.3 protocol standard to support 10/100M
full/semi-duplex work modes. It can run in any Ethernet work mode, i.e. supporting any Ethernet interface. According to
the actual situation, prepare a crossed or straight-line cable in cooperation with RJ45 and connect one end with the UTP
interface on the back board of the equipment and the other end with PC or SWITCH. When the equipment is open, if the
connection is correct, LINK light will be ON.
6.3.2 E1 connection
Insert the accessory BNC coaxial cable connector into E1 PORT. Then connect the equipment with transmission
equipment (such as PDH or SDH optical multiplexer) with the coaxial cable.
z Check whether the E1 circuit is shortly connected, broken or poor in connection. If it goes through SDH equipment,
the configuration of E1 circuit by network management must be checked.
z The error code rate of E1 circuit measured by an error code instrument must be lower than 10-7.
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BYC-C4 Interface Converters
z The length of E1 coaxial cable shall be no more than 200M - 300M. The transmission time delay between each E1
line shall be no more than 8ms.
7. Trouble shooting
Phenomenon Cause Solution
Abnormal power supply
E1 link Malfunction
Ethernet port malfunction
8. Accessories
Power supply doesn’t comply with the
requirement.
Power switch is off Turn on the power switch
Power junction stud is loosing Screw it
Value of the impedance doesn’t match with the
E1 interface.
E1 interface has been wrongly connected. Connect it in a correct way.
Malfunction of the connected equipment Ensure the equipment which is
The manufacture of network access line is not
according to standard sequence.
Malfunction of uplink equipment or working
status
Replace a power supply.
Check the impedance setup of the
equipment which is connected with
INV-4E1.
connected with INV-4E1 is working
normally.
Make sure the network access line is
produced according to the standard
sequence.
Make sure the setup of the uplink
equipment or working status is ok.
Description Quantity
INV-4E1 converter 1
User manual 1
BNC/RJ-45 8/4
AC power cord 1(only for AC type)
6
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