Protocol Converter FE1 4ETH

FE1-4*100BASE-TX Protocol converter is an Ethernet bridge of high performance,which accomplishes the convert between the 4*100M Ethernet port and the E1 port. As an extended device of the Ethernet, the FE1-4*100BASE-TX protocol converter realizes interconnection of two Ethernet by using the E1 channel provided by existing networks with low cost.

10/100Base-T(RJ45) interfaces are provided at the end of Ethernet LAN to accomplish various functions including MAC address self-learning, address filtering, address table maintenance and flow control.

E1 interfaces conforming to ITU-T G.703 and G.704 proposals are provided at the end of WAN, supporting RJ45 and BNC connection modes. The E1 ports support both framing and unframing architecture. The user can select an operating mode for the E1 interface according to the connected E1 environment. This provides flexibility of network application. In the framing mode, the E1 interface provides a rate of N*64Kbps(N=1~31). In the unframing mode, the E1 channel provides a rate of 2.048Mbps and accomplishes transparent transmission.

FE1-4*100BASE-TX protocol converter is used in the framing mode, the transmission clock can be either provided internally, i.e. using the main clocking timing mode (INT), or extracted from the E1 channel, i.e. using slave clock timing mode.

FE1-4*100BASE-TX protocol converter provides plenty of self-test functions, supporting local loop and remote loop. It also provides pseudo random code test function to test error codes in the circuit.


Main Features

  • In accordance with the provisions of IEEE 802.3u、IEEE 802.1q、IEEE 802.3x、ITU-T G.703、G.704 and G.823 protocols.
  • E1 interface framing/unframing optional;balanced 120ohm/ unbalanced 75ohm optional
  • The E1 interface uses PCM31 mode, supporting CRC check.
  • E1 interface main/ slave clock optional in the framing mode.
  • In the E1 framing mode, the number of time slots is optional from 1 to 31.
  • Supporting 2.048Mbps transparent transmission in the E1 unframing mode.
  • The 10/100Base-T Ethernet interface supports 10/100M half/ full duplex modes.
  • Each Ethernet port support plug and play of MDI/MDI – X adaptive function.
  • Ethernet port support based on port and tag VLAN (16 VLAN).
  • The rate of each Ethernet port is measured by the configuration software, bandwidth particles for 32 k.
  • Each Ethernet port support broadcast storm protection, PAUSE flow control.
  • MAC address self-learning and address filtering functions, reducing the transmission load of the E1 circuit.
  • Built-in  64Mbits  SDRAM  Ethernet  data  buffer  memory,  improving  the  capability  of Ethernet side anti-outburst, assuring high throughput of data transmission.
  • E1 circuit remote loop and local loop tests.
  • Pseudo random sequence test, facilitating the test of E1 circuit.
  • Perfect circuit test and alarm indication.
  • Support local console network, can be set up on the Ethernet port.
  • Can be connect most manufacturers protocol converter.

3.Technical Specifications

Protocol:   G.703、G.704、G.736、G.823、I.431

IEEE802.3 100BASE_T

Circuit interface (E1):

impedance: 75Ω, physical interface: BNC

impedance: 120Ω, physical interface: RJ45

interface rate: framing: N*64Kbps,N=0~31; unframing: 2.048Mbps。

Coding: HDB3,Jitter tolerance in accordance with G.823

Output jitter < 0.05UI

Physical interface: RJ45

Interface rate: 10/100Mbps

Coding: Manchester

Cable: 75Ωcoaxial-cable, UTP5 twisted pair

Transmission range: circuit interface: BNC: 600m

RJ45: 300m

Data interface: 100m

Indicator: indicating power, connection states of data and circuit interfaces, operation state, test state and trouble alarm.

Dimensions: stand alone: 210mm(length) x 140mm(width) x 40mm(height) Power supply: stand alone: 85V~264V AC input, 5V/1A output

-38V~-58V DC input,5V/1A output

Power dissipation: 3W

Operational temperature:   0℃~50℃ Storage temperature:      -20℃~80℃ Humidity:                   5%~90% (no condensation)

4.Typical Application

Mode 1: Connect Ethernet with E1 networks.

SDH, PDH and DDN networks have already been widely adopted. With E1 channels provide by such networks, bridging connection and interconnection of two Ethernet networks at different locations can be easily realized by the FE1-4*100BASE-TX.


Mode 2: Extend an Ethernet network with existing twisted pair or coaxial cable.


Connected with twisted pair or 75ohm coaxial cable, the E1 ports of FE1-4*100BAST-Tx support a transmission range of 600m. Two Ethernet networks at different locations can be bridged by

two FE1-4*100BAST-Tx with existing twisted pair or coaxial cable.


5.Installation And Panel Description

5.1. Unpacking (stand alone FE1-4*100BASE-TX protocol converter)

Check the accessories and spare parts when open the package. In case of missing, immediately contact our offices or agencies. Check for the following items:

■ One FE1-4*100BASE-TX Protocol converter

■ Certificate of conformity

■ Operation manual

■ A supply cord with a two-phase plug

■ Two plugs for coaxial cable

■ A packing list

In case of any damage in transportation, contact our offices or agencies.

5.2. Front And Rear Panel Of The Stand Alone Device


Explanations for one rows of indicators at the front panel as follows: PWR: Power. Always lights after starting up.

LNK: Link. Always lights if the data link is complete.

RX: Data reception. Flickers when the data interface receives data.

TX: Data transmission. Flickers when the data interface transmits data.

LOF: E1 frame-lost alarm. Bright when local device E1 frame lost. Blinking when remote device

E1 frame lost. Use only in framed E1.

LOS: E1 link interruption alarm. Always lights after starting up till synchronization is established.

It also lights in case of E1 link interruption or signal loss in communication. AIS:   Link interruption alarm.

CRC: CRC error alarm.

LOOP: Indicator of test. Blinking when device in test mode.

PTOK: Circuit pseudo-random sequence test success. In the state of remote E1 interface loop, transmits pseudo-random codes to the remote equipment via local E1 interface, and checks for error codes according to the pseudo-random codes received at the local E1 interface. If there is no error code, the indicator lights. This function can be used to check the E1 circuit.

Note: Circuit pseudo-random sequence test is valid only when the local equipment is in the framing mode and main clock is configured.

The AC input rear panel of FE1-4*100BAST-Tx as shown in figure 4, The DC input rear panel of


FE1-4*100BAST-Tx as shown in figure 5, As indicated below:

Figure 5 DC input rear panel of FE1-4*100BAST-Tx



220V AC: AC socket with two cores

36~72V DC:DC power outlet

OFF   ON: Power switch. When the ON button is pressed down, the power supply is turned on

8 DIP Switch: System configure, more description in 6.2.2

E1-75Ω TX/RX: BNC transmission/reception socket for 75ohm impedance E1 interface. E1-120Ω: RJ45 socket for 120ohm impedance E1 interface.

ETH:10/100M Ethernet interface RJ45 socket,

Act indicator flashing lights that data transmission,

SPD indicator always lights that 100M mode, lighting-off is 10M mode.

  1. Applications Of FE1-4*100BASE-Tx

6.1. Definition Of Balanced Twisted-pair Wire Sequence For RJ45 Interface

The equipment has two kinds of RJ45 socket with different purposes and connections, i.e. RJ45 data interfaces for Ethernet and RJ45 circuit interfaces for E1 circuit, which should be classified before using.

6.1.1. 10/100Base-T interface Wire Sequence

The RJ45 balanced twisted pair interface for 10/100Base-Tx interface can use DCE or DTE standard stipulations, which is set by switch SW3.

Definition of RJ45 pins for DTE equipment As show in figure 6.


Definition of RJ45 pins for DCE equipment As shown in figure 7.


Manufacture and operation directions for cables:

When the RJ45 interface pins of the protocol converter use DCE standard stipulations, a UTP 5 direct connecting cable can be used if the protocol converter is to be connected to a DTE device (such as the Ethernet interface card on a PC); a UTP 5 cross cable can be used if the RJ45 interface of the protocol converter is connected to a DCE device (such as HUB or SWITCH).

When the RJ45 interface pins of the protocol converter use DTE standard definitions, a UTP 5 cross cable can be used if the protocol converter is to be connected to a DTE device (such as the Ethernet interface card on a PC); a UTP 5 direct connecting cable can be used if the RJ45 interface of the protocol converter is connected to a DCE device (such as HUB or SWITCH).


6.1.2. E1 interface Wire Sequence

1 and 2 are transmitting lines, 4 and 5 are receiving lines, as shown in figure 10.

p86.2. Setting Of DIP Switch

6.2.1. 100 base – Tx Interface DTE/DCE mode Setting

This product Ethernet port depending on the type of interface, automatic selection DTE or DCE mode, without human intervention. RJ45 socket pin definition, can choose the way to set the DTE or DCE. See user manual 6.1.1.

6.2.2. System Test And Configuration

Easy to setup and to meet the different needs of all users, the device provides five e code switch

S1 to S5, users can according to the need for system setup.

Note:S5 in the rear panel of the device. S1,S2,S3,S4 at the bottom of the device.

S5 is used for system configuration (SYS CFG)

S5.1:  Main/slave  clock  setting.  ON  for  main  clock  (INT-CLK)  and  OFF  for  slave  clock


S5.2: Track remote time slot setting or not, on for R-SLOTS, OFF for L-SLOTS (valid only when S5.1 = OFF).

S5.3: Mode select.ON for allow transmit the data from the Eth interface to the E1 interface and take back when loop test. OFF (E_CUT) for cut off the data from the Eth interface completely when loop test.

S5.4: LLOOP. Local loop back setting (E1 interface in direct loop back), ON valid.

S5.5: RLOOP. Remote loop back setting (remote E1 interface in direct loop back), ON valid.

Remote loop loops rear the E1 port of the remote equipment by sending remote loop instructions to the remote equipment through the local equipment. Remote loop can be used to check the E1 circuit.

Note:When you set RLOOP, you must make the local device at main clock and the framing mode.

(1) When S5.6~S5.8 is all jumped to end 75, the physical match impedance of the E1 interface is 75ohm non-balanced coaxial cable. (The E1 circuit uses BNC coaxial-cable sockets.)

(2) When S5.6~S5.8 is all jumped to end 120, the physical match impedance of the E1 interface

is 120ohm balanced twisted-pair. (The E1 circuit uses RJ45 sockets.)
Note: The default setting is (1).
Frame/unframed and time slot Settings:

Code switch S1, S2, S3, S4, a total of 32 switch time slot is set for E1



1st switch (S1.1) is used for controlling E1 framing/un-framing. “ON” refers to un-framing mode


31 switches, from 2nd—32nd (S1.2~S1.8, S2, S3, S4), are respectively used for controlling the selection of 1st –31st time slots. Set at “ON”, the corresponding time slot is selected; set at “OFF”, the corresponding time slot is not selected. The rate of E1 interface is completely dependent on the number of the selected time slots.

For example: the setting of 3rd switch to “ON” and all other switches to “OFF” indicates that 2nd time slot is selected, at this moment the rate is 64K; the setting of 7th and 8th switches to “ON” and all other switches to “OFF” indicates that 6th and 7th time slots are selected, with a rate of


TS0  setting  is  used  for  specifying  E1  frame  to  be  transparent  or  framing:  ‘0’–framing,

“1”–un-framing. But the bit has to be specified in combination with other time slots. TS16 setting is used for controlling E1 frame structure to be PCM30(CAS)or PCM31(CCS): ‘0’—PCM30, at this moment 16th time slot must not be used for transmission service; ‘1’—PCM31, 16th time

slot can be used for transmission service. Besides, TS1—TS31 are respectively used for controlling the selection of 1st—31st time slots: ‘1’—the corresponding time slot is selected;

‘0’—the corresponding time slot is not selected.

Typical Applications:

Unframed :The frame mode: S1 ON, all the rest OFF ( rest of the position of the switch does not  affect the frame set.

Frame: S1 OFF, the switch is based on E1 channel to use the time slot location and v. 35 port rate to choose. (If set to track the remote time slot,set to follow the remote time slot, slot switch will be invalid)

Note:Setting default S1.1 ON, S1, S2, S3, S4 OFF.

Note: tracking the remote time slot is set to: S5.2 ON, S5.1 OFF. Note: Setting default independent S5.2 OFF, S5.1 OFF

6.3. Configuration Of Ethernet Connecting Devices

The equipment uses 10/100Base-T Ethernet interfaces and supports adaptive 10/100M half/full duplex mode.

Ethernet devices connected to FE1-4*100Base-Tx (such as SWITCH, HUB, Ethernet adapter card (NIC), etc.) can be set to 100M full duplex, 100M half duplex, adaptive 100M half/full duplex and adaptive 10/100M.

6.4. Simple Self-test Methods For Devices And E1 Circuits

Test 1: test of back-to-back connection

Connect two FE1-4*100Base-Tx devices back to back, ping the other’s IP address on the two computers to test the two devices,as shown in figure 12.


Test 2:   test of E1 circuit transmission error codes.

If the exchange end and the user end is very far away, the E1 circuits of the two AN-E1-ETH bridge must be correctly connected first. Otherwise, indicator LOS will always light. Set the device at the exchange end to framing and main clock mode, set S5.5 (RLOOP) to ON, pseudo random sequence test will be executed. At the exchange end if indicator LOOP flickers and indicator PTOK always light, it means successful loop and pseudo random code test and the

E1circuit has no error code.


6.5. Common Questions And Their Maintenance


  1. Network Management Software

7.1. Log In Network Management Software

Double click on the software icon, operation network management software.Enter the username in the login interface and Password, the default username is: admin, Password: Password.Super username: super888, password: super888.The super username and password cannot be changed.


Click “Connect” button in the login page, enter the serial port configuration dialog box, can choose one of port COM1, COM2, COM3.Baud rate, bytes bit, parity bit and stop bits fixed 9600、8、none、1.Click “OK” button, after the success of the serial port configuration, click the “Enter” button at the landing interface,enter the network configuration screen.


7.2. Configuration Network Management

7.2.1. Global Control Interface

“New Password” Button: used to change the default user name and password in network management software.

“Disconnect” Button: used to disconnect serial port connection.

“Reconnect” Button: used to serial port connection.



7.2.2. Configure LAN&WAN Port Interface

In the network configuration screen, click on the “Configure LAN&WAN Port” label, into the Ethernet Port configuration interface.


This interface is used to configure the attribute of each Ethernet port.
Including LAN port 1, 2, 3, 4 and a WAN port. LAN port is shown user-oriented provides four RJ45 Ethernet interface, WAN port is the internal port equipment, by the fiber port of equipment and the remote device to connect.
Each Ethernet port attribute including set to 802.1 Q tag Insertion and Removal,802.3X Pause, opens and closes 802.3 X Pause flow control function, port Forwarding function opens and closes, broadcast storm protection function to open and close.
The port for the unit with the 32 KBPS rate limit function configuration, as well as the rate at each Ethernet port and duplex mode configuration.

802.1q Tag: “Insertion” means Tag label, when output the packet have a Tag label don not make any change; If not with the Tag label, is inserted input port with default VLAN ID in packet.

Removal”  means delete the Tag label, when the packet from the   port output with the Tag label, remove the Tag label; If are not with the Tag label, do not make any change.

802.3X: “Enable” means open the Ethernet port PAUSE flow control function, “Disable” means close the Ethernet port PAUSE flow control function.

Port Forwarding “Enable ” means open the Ethernet port forwarding function,” Disable”means to close the Ethernet port forwarding function.

Broadcast Storm Protection “Enable” means open the Ethernet broadcast storm dampening function, this port is only 1% of the Ethernet broadcast packets will be allowed to pass. “Disable” means closing Ethernet broadcast storm dampening function, the port forwarding all the Ethernet broadcast packets.

Port Rate Limitation: Port rate limit, use 32 KBPS for step length adjustment port of contract rate, value range of 0 ~ 3200.

Speed and DuplexRate and duplex mode, can be set up separately for the adaptive (AUTO), forced 100M full duplex, forcing 100M half duplex, forced 10M full duplex, forced 10M half duplex.

Interface below contains four buttons, respectively for the Default,Apply,Upload,Exit.

Default: Restore interface configuration default value when the data is not issued to the device, need to click on the Apply button, then default configuration data can be issued to the device

Apply: Network management interface configuration data set up finish, click on the Apply button, make the configuration data is send to the device, device receive current configuration data of the network, store FLASH memory storage area, according to the latest configuration data, the network administrator change the operation mode of the device.

Upload:Upload the equipment in the FLASH memory to save the latest network management data, through the network management interface display.

Exit: Exit the network management system.

7.2.3. Set VLAN Interface

In the network configuration screen, click “Set VLAN” label, enter VLAN configuration interface, as shown figure below.


The interface used to four Ethernet LAN and WAN port to vlans. Including the Port Separate, VLAN Mode, LAN and WAN Port PVID (Port VLAN ID) and VLAN configuration.

Port Separate Port isolation setting, “Enable”port isolation make between four LAN port can’t communicate with each other, each of LAN only communication with WAN, WAN can communication with four LAN. In the case of a port isolation, “VLAN Table” and “VLAN Mode” configuration failure. “Disable” port isolation, under the condition of the port isolation, Ethernet packets according to the configuration of the VLAN Table for forwarding.

VLAN Mode“Port – -based VLAN configuration ” based on the Port VLAN division, packet forwarding is not based on the VLAN Tag in the packet center, it is according to the configuration of each Port PVID for forwarding. “IEEE802.1q tag VLAN” shown packet forwarding is based on the VLAN tag in the packet center, if no tag markup in the packet, depending on the port PVID for forwarding.

LAN&WAN Port PVID: Configure each Ethernet port of the default VLAN ID value, for four LAN port and a WAN port configuration. Through the VLAN freely choose a VLAN ID in the table as port PVID values.

VLAN TableVLAN can support 16 largest VLAN records in the table, each VLAN record including VLAN ID value and members of the VLAN, VLAN ID value in the range of 1 ~ 4095, member of the VLAN can in four LAN port and a WAN port option.

Click the Add VLAN, means add records in VLAN, as shown in the below, set the VLAN ID value is 345, VLAN members include LAN Port 2 and WAN.


If you want to Delete or change the VLAN a record in a table, use the mouse to click on the VLAN corresponding records as shown in the above, at this time, “Delete VLAN”, “Modify vlans”, “Set PVID” button is effective.

Click the “Delete VLAN”, delete the selected VLAN.

Click the “Modify vlans”, used to Modify the selected VLAN.


Click on the “Set PVID” button, selected VLAN ID is set to Port PVID value, as shown in the above, VLAN ID value 345 as a LAN Port 2 PVID value. Click on the “Set PVID” “OK” button in the dialog box, set the LAN Port 2 PVID value to 345, as shown in the figure below. “LAN & WAN Port PVID” of LAN 2 PVID value is 345.


VLAN configuration is completed, by clicking on the “Apply” button, the configured data issued to the device.

7.2.4. State Monitoring Interface

Click on the “State Monitoring”TAB, then enter the equipment running status Monitoring page online. Through the equipment running status monitoring page, the user can view the equipment with the Name of the “Product Name”, “Port Separate”, VLAN Mode”, “VLAN Table”, and all the operation of the LAN and WAN port. More information please click on “More > >” button to view.


As shown in the above, user1 and user2 can communicate with each other between, and to be able to access the Server, between User3 and User4 can communicate with each other, and to be able to access the Server, but user1 and user2, user3 and user4 isolation, need equipment FE1/4 Eth A VLAN division as shown in the figure below.

In VLAN increase three records in the table, set LAN 1, LAN 2 and WAN belongs to the VLAN

10. Set the LAN 3, LAN 4 and WAN belong to the VLAN 11; set the LAN 1, LAN2, LAN 3, and WAN 4 belong to the VLAN 12. Then set the PVID value of LAN 1 and LAN 2 value of 10, set the PVID value of LAN 3 and LAN 4 value of 11, WAN port PVID value of 12.

Port Separate configured to “Disable”, VLAN Mode is set to “Port -based VLAN.


7.3.2. Example 2


As shown in the above,

The User A1 only can communicate with User B1;
The User A2 only can communicate with User B2;
The User A3 only can communicate with User B3;
The User A4 only can communicate with User B4;

Need equipment FE1/4 Eth A and FE1/4 Eth B figure below vlans as shown in the figure.


Add 5 records in the table of VLAN.

Set the LAN 1and WAN belong to the VLAN 10.
Set the LAN 2 and WAN belong to the VLAN 11.
Set the LAN 3 and WAN belong to the VLAN 12.
Set the LAN 4 and WAN belong to the VLAN 13.

Set LAN 1、LAN 2、LAN 3、LAN 4 and WAN belong to the VLAN 14.

Set the LAN 1 PVID value to 10
Set the LAN 2 PVID value to 11
Set the LAN 3 PVID value to 12
Set the LAN 4 PVID value to 13
Set the WAN PVID value to 14

Port Separate configured to “Disable”, VLAN Mode is set to ” IEEE 802.1 q Tag VLAN”.

Also set the WAN port “802.1 q Tag to insert VLAN Tag” Insertion “, as shown in the figure below