Sollae Systems CSE-H20 User manual

Sollae Systems Co., Ltd.
http://www.sollae.co.kr
Serial Device Server
CSE-H20 User's Manual
Version 1.8
2009-07-13

CSE-H20 User's Manual Ver. 1.8
Sollae Systems Co., Ltd. - 1 - http://www.sollae.co.kr
To all residents of the European Union
Important environmental information about this product
This symbol on this unit or the package indicates that disposal of this unit after its
lifecycle could harm the environment. Do not dispose of the unit as unsorted
municipal waste; it should be brought to a specialized company for recycling. It is your
responsibility to return this unit to your local recycling service. Respect your local
environmental regulation. If in doubt, contact your local waste disposal authorities.

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Contents
CONTENTS ........................................................................................................................................... - 2 -
1 OVERVIEW................................................................................................................................ - 5 -
1.1 Overview ................................................................................................................................................................ - 5 -
2 SPECIFICATIONS ..................................................................................................................... - 6 -
2.1 Components ......................................................................................................................................................... - 6 -
2.2 Specifications ....................................................................................................................................................... - 6 -
2.3 Interface.................................................................................................................................................................. - 7 -
2.3.1 Serial Ports (RJ45) .................................................................................................................................. - 7 -
2.3.2 Ethernet Interface .................................................................................................................................. - 9 -
2.3.3 Power ........................................................................................................................................................... - 9 -
2.3.4 System LEDs .......................................................................................................................................... - 10 -
2.3.5 ISP Switch ............................................................................................................................................... - 10 -
3 INSTALLATION AND TEST RUN ........................................................................................ - 11 -
3.1 Installation Method ........................................................................................................................................ - 11 -
3.1.1 Checking the Communication Environment .......................................................................... - 11 -
3.1.2 Connecting to the Network ........................................................................................................... - 11 -
3.1.3 Configuring the Environmental Variables ............................................................................... - 12 -
3.2 Test Run .............................................................................................................................................................. - 12 -
3.2.1 Changing PC IP Address ................................................................................................................. - 12 -
3.2.2 Installing CSE-H20 .............................................................................................................................. - 12 -
3.2.3 Configuring CSE-H20 ........................................................................................................................ - 12 -
3.2.4 Communication Test ......................................................................................................................... - 13 -
4 CONFIGURING IP ADDRESS VARIABLES ......................................................................... - 16 -
4.1 IP Address and Environmental Variables ............................................................................................. - 16 -
4.2 Configuring with ezManager ..................................................................................................................... - 16 -
4.2.1 ezManager ............................................................................................................................................. - 16 -
4.2.2 Buttons of ezManager ...................................................................................................................... - 17 -
4.2.3 Parameters of ezManager............................................................................................................... - 17 -
4.2.4 Matters to be attended to ............................................................................................................. - 18 -
4.3 AT command ..................................................................................................................................................... - 18 -
4.4 IP Address Related Categories Settings via DHCP ......................................................................... - 18 -
4.5 IP Address settings via PPPoE .................................................................................................................. - 19 -
4.6 Notify IP Change ............................................................................................................................................. - 19 -

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4.6.1 DDNS (Dynamic Domain Name System) ................................................................................. - 19 -
4.6.2 TCP/UDP.................................................................................................................................................. - 19 -
5 OPERATION MODE.............................................................................................................. - 20 -
5.1 Operation Mode Overview ......................................................................................................................... - 20 -
5.1.1 Overview ................................................................................................................................................. - 20 -
5.2 How to Initiate Each Operation Mode ................................................................................................. - 20 -
5.2.1 How to Initiate the Normal Mode .............................................................................................. - 20 -
5.2.2 How to Initiate the Serial Configuration Mode .................................................................... - 20 -
5.2.3 How to Initiate the ISP Mode ....................................................................................................... - 20 -
5.2.4 Comparison of Operation Modes ............................................................................................... - 20 -
5.3 Normal Communication Mode ................................................................................................................ - 21 -
5.4 Serial Configuration Mode ......................................................................................................................... - 21 -
5.5 ISP Mode ............................................................................................................................................................ - 21 -
5.5.1 Upgrading Firmware .......................................................................................................................... - 21 -
6 NORMAL COMMUNICATION MODE ............................................................................... - 23 -
6.1 T2S – TCP Server ............................................................................................................................................. - 23 -
6.1.1 TCP Connection ................................................................................................................................... - 23 -
6.1.2 Serial Data before the TCP Connection ................................................................................... - 23 -
6.1.3 Data Transmission .............................................................................................................................. - 23 -
6.1.4 Disconnection ....................................................................................................................................... - 24 -
6.2 COD – TCP Client ............................................................................................................................................ - 25 -
6.2.1 Serial Data before the TCP Connection ................................................................................... - 25 -
6.2.2 Data Transmission .............................................................................................................................. - 25 -
6.2.3 Disconnection ....................................................................................................................................... - 25 -
6.2.4 DNS ........................................................................................................................................................... - 26 -
6.3 ATC ........................................................................................................................................................................ - 27 -
6.4 U2S ........................................................................................................................................................................ - 28 -
7 ATC MODE ............................................................................................................................ - 29 -
7.1 Overview ............................................................................................................................................................. - 29 -
7.1.1 AT command format ......................................................................................................................... - 29 -
7.2 Basic AT Command Set (Example: ATA, ATD etc.) .......................................................................... - 29 -
7.3 Extended AT Commands (Example: AT+PLIP etc.) .......................................................................... - 30 -
7.4 Online State and AT Command State ................................................................................................... - 30 -
7.4.1 Changing Online State to AT Command State .................................................................... - 31 -
7.4.2 Changing AT Command State to Online State .................................................................... - 31 -
7.5 Example of Configuration with AT Command .................................................................................. - 31 -
7.6 Example of TCP Connection ...................................................................................................................... - 31 -

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7.6.1 Example of Active Connection ..................................................................................................... - 32 -
7.6.2 Example of Active Connection with host name ................................................................... - 32 -
7.6.3 Example of passive Connection ................................................................................................... - 32 -
7.7 Example of TCP Disconnection ................................................................................................................ - 33 -
7.7.1 Example of active disconnection ................................................................................................. - 33 -
7.7.2 Example of passive disconnection .............................................................................................. - 33 -
8 SECURITY PROTOCOLS & OPTION .................................................................................. - 34 -
8.1 SSL ......................................................................................................................................................................... - 34 -
8.1.1 SSL (Secure Socket Layer) ............................................................................................................... - 34 -
8.1.2 How to set the SSL on CSE-H20 ................................................................................................. - 34 -
8.1.3 Restriction ............................................................................................................................................... - 35 -
8.2 SSH ........................................................................................................................................................................ - 35 -
8.2.1 SSH (Secure Shell) .............................................................................................................................. - 35 -
8.2.2 How to set the SSH on CSE-H20 ................................................................................................ - 35 -
8.2.3 Restriction ............................................................................................................................................... - 36 -
8.3 ezTCP Firewall ................................................................................................................................................... - 36 -
9 CHECKING & DEBUGGING ................................................................................................. - 38 -
9.1 Telnet .................................................................................................................................................................... - 38 -
9.1.1 Telnet Login ........................................................................................................................................... - 38 -
9.1.2 Commands ............................................................................................................................................. - 38 -
9.2 Status on ezManager .................................................................................................................................... - 40 -
9.2.1 Status of the CSE-H20 ...................................................................................................................... - 40 -
9.2.2 Closing TCP connection by the ezManager ........................................................................... - 40 -
9.3 Remote Debugging ....................................................................................................................................... - 41 -
10 TECHNICAL SUPPORT, WARRANTY, AND NOTES ON OPERATION .......................... - 42 -
10.1 Technical Support ........................................................................................................................................... - 42 -
10.2 Warranty .............................................................................................................................................................. - 42 -
10.2.1 Refund ................................................................................................................................................... - 42 -
10.2.2 Free Repair Services ........................................................................................................................ - 42 -
10.2.3 Charged Repair Services ............................................................................................................... - 42 -
10.2.4 Notes on Operation ........................................................................................................................ - 42 -
11 REVISION HISTORY ............................................................................................................. - 44 -

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1 Overview
1.1 Overview
Along with the development of the Internet, the demand for data communication
functions has increased recently. Data communication over the Internet requires using
TCP/IP, the Internet communication protocol. That is to say, in order to connect a system
to the Internet, TCP/IP protocol must be implemented. It is possible to implement TCP/IP
by directly implementing the protocol, porting public TCP/IP, or using Operating System
(OS). However, all these methods impose burdens on the developer in time, cost, and
technology.
ezTCP series, a Serial ↔ TCP/IP protocol converter product group of Sollae Systems,
enables you to use TCP/IP communication (the Internet communication) function simply by
“connecting the cable to a serial port”. ezTCP sends data from the serial port to the
Internet network after TCP/IP processing, and vice versa.
CSE-H20 in ezTCP product group is a product that provides TCP/IP communication
through Ethernet. In other words, like other ezTCP products, CSE-H20 sends data from the
serial port to the LAN after TCP/IP processing and vice versa.
As CSE-H20 has 2 RS232 ports, it can be connected to two RS232 devices in the same
time. And it is easy CSE0-H20 to attach to user systems because of its compact size.
It provides DHCP and PPPoE functions, so that it can be applied to the cable network
and the xDSL network. And it has DDNS (Dynamic DNS) function, so it can be used more
easily in the internet.
It also provides debugging function, so user can solve the problem with ours.

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2 Specifications
2.1 Components
CSE-H20 Body
5V Power Adopter (Option)
RS232C cable for PC connection - RJ45-DB9F-1M (Option)
RS232C cable for user device connection - RJ45-DB9M-1M (Option)
Cross-over Ethernet cable (Option)
DIN rail adopter (Option)
2.2 Specifications
Power Input Voltage 5V (±10%)
Current 200mA typical
Dimension 87mm x 57mm x 24mm
Weight About 70g
Interface Serial RJ45 x 2
Network 10/100 Base T (RJ45)
Serial Port 2 x RS232 (1200bps ~ 230400bps, RTS/CTS flow control)
Network Ethernet 10/100 M bit auto-sense
Auto MDI/MDIX
Protocols
TCP, UDP, IP, ICMP, ARP, DHCP, PPPoE
DNS lookup, Dynamic DNS(DDNS)
Telnet COM Port Control Option (RFC2217)
SSL, SSH
Diagnostic Online Debugging Function
RoHS RoHS Compliant
Approvals
CE: F690501/SP-EMC000979
FCC: STK-07-EMCG0122
MIC: SLS-CSE-H20
Communicat
ion Mode
T2S TCP Server Mode
COD TCP Client Mode
ATC TCP Server/Client
(AT command emulation)
U2S UDP
Utilities ezManager Configuration utility via LAN

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ezterm Socket test utility
hotflash Firmware download utility via TFTP
ezVSP Serial-TCP/IP virtual driver for Windows
2.3 Interface
2.3.1 Serial Ports (RJ45)
COM1 COM2
RS-232
number
name
description level Dir. Etc.
1 RTS Request To Send RS232
Output
Optional
2 DTR
Data Terminal Ready
RS232
Output
Optional
3 TXD
Transmit Data RS232
Output
Mandatory
4 GND
Ground Ground
- Mandatory
5 GND
Ground Ground
- Mandatory
6 RXD
Receive Data RS232
Input Mandatory
7 DSR
Data Set Ready RS232
Input Optional
8 CTS
Clear To Send RS232
Input Optional
LEDs of Serial Port
Condition Color Operation
TCP
disconnected
Green OFF
Yellow
TCP
connected
Green As same as CTS (on: CTS active)
Blinks if CSE-H20 gets data from the serial port.
Yellow As same as RTS(on: RTS active)
Pin #1

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Blinks if CSE-H20 sends data to the serial port.
UDP Mode
Green As same as CTS (on: CTS active)
Blinks if CSE-H20 gets data from the serial port.
Yellow As same as RTS(on: RTS active)
Blinks if CSE-H20 sends data to the serial port.
Data bits, Parity, and Stop bit
Item Configurable Value
Data bit 8, 7, 6, 5
Parity None, Even, Odd, Mark, Space
Stop bit 1, 1.5, 2
Flow Control
CSE-H20 support RTS/CTS Hardware Flow Control.
Telnet COM Port Control Option
CSE-H20 has Telnet COM Port Control Option function that is specified by RFC2217. If
the Telnet COM Port Control Option is enabled, CSE-H20 sends the CTS, DSR control signal
to the communication counterpart, and CSE-H20 sets its serial port items (RTS, DTR, Baud
rate, data bits, parity, stop bit) after getting information from the communication
counterpart.
TX Delay
CSE-H20 has a function that delays its serial data for the user’s slow device. User can set
the interval between byte and byte which are outputting from CSE-H20’s serial ports. Its
unit is byte.

CSE-H20 User's Manual
Ver.
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2.3.2
Ethernet Interface
Network part of CSE-
H20
connect UTP cable. The Ethernet part detects 10Mbit or 100Mbit Ethernet automatically, to
connect the corresponding cable
cable or cross-
over cable
Each piece of Ethernet equipment has unique hardware addresses, and
factory-
set hardware address (which is called MAC address).
2.3.3 Power
DC 5V is used for CSE
-
#1
Ver.
1.8
- 9 -
Ethernet Interface
H20
is configured with Ethernet. So, what you have to do is only to
connect UTP cable. The Ethernet part detects 10Mbit or 100Mbit Ethernet automatically, to
connect the corresponding cable
. It also provides auto MDI/MDIX function to detect 1:1
over cable
automatically.
Each piece of Ethernet equipment has unique hardware addresses, and
set hardware address (which is called MAC address).
10/100Base-T DC 5V
-
H20 and the specification is below:
http://www.sollae.co.kr
is configured with Ethernet. So, what you have to do is only to
connect UTP cable. The Ethernet part detects 10Mbit or 100Mbit Ethernet automatically, to
. It also provides auto MDI/MDIX function to detect 1:1
Each piece of Ethernet equipment has unique hardware addresses, and
CSE-H20 also has

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2.3.4 System LEDs
CSE-H20 has 5 system LEDs.
System LEDs
Mode Name
Color LED Status Description
Common
PWR Red ON Power is supplied.
LINK Green
ON Connected to 100M Ethernet.
Red ON Connected to 10M Ethernet.
RXD Yellow
Blinking There are data on the LAN
TXD Green
Blinking Packets are being transmitted
to Ethernet
Normal
mode STS Yellow
Blinks in
every second
IP is allocated but TCP
connection is not established.
Blinks 4
Times/sec Dynamic IP is not allocated.
ISP
mode STS Yellow
OFF CSE-H20 is in the ISP mode
Serial
Configuration
mode
RXD/
TXD/
STS
- Blink 2 Times/sec
at one time
CSE-H20 is in the Serial
Configuration mode
2.3.5 ISP Switch
There is an ISP switch on the side. If this switch is push 20ms~1s, it operates as Serial
Configuration Mode. If this switch is push over 1 second, CSE-H20 operates as ISP mode.
User can do firmware download to the CSE-H20 in the ISP mode. Please refer to 4.2 for
more information on firmware download.

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3 Installation and Test Run
3.1 Installation Method
You can install CSE-H20 in the following steps.
Title Item Sub-item
1.
Checking the
communication
environment
Check items
IP address environment
Serial port settings
Application program to be used
2.
Connecting to the
network
Check method Check if LINK LED is ON.
3.
Configuring the
environmental variables
Configuration
method
Set by ezManager, a utility program for
configuration through the network.
Set by AT commands in ATC mode
Configuration
items
IP address related items
Serial port related items
Communication mode (depending on
application program)
4. Application to the field
3.1.1 Checking the Communication Environment
Before installing CSE-H20, check the network environment where CSE-H20 is to be
installed, including the followings matters:
IP address environment (local IP, subnet mask, gateway, DHCP/PPPoE etc.)
Serial port type of the equipment to which CSE-H20 is going to be connected
(RS232)
Serial port items of the equipment to which CSE-H20 is going to be connected
(baud rate, data bit, parity, stop bit, flow control)
Application program protocol to be used (TCP/UDP, server/client, etc.)
Security function (SSL, SSH, etc.)
3.1.2 Connecting to the Network
Connect power to CSE-H20, and connect CSE-H20 either directly to the Ethernet port of

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the PC where test is to be performed or to the network (hub) to which the PC is connected.
3.1.3 Configuring the Environmental Variables
When network connection is completed, configure the environmental variables such as IP
address related items, serial port related items, and communication mode related items
through the LAN using “ezManager” the environmental variable configuration program.
3.2 Test Run
You can perform test run according to the following orders. The test run described here
is based on the assumption that the IP address of the PC is set to 10.1.0.2
3.2.1 Changing PC IP Address
You can change the IP address of your PC as follows:
IP Address 10.1.0.2
Subnet Mask 255.0.0.0
Gateway IP Address
-
3.2.2 Installing CSE-H20
Connect the supplied RS232 cable (RJ45-DB9F-1M) between your PC and CSE-H20, the
LAN cable to the hub to which the PC is connected or directly to the PC, and the supplied
CSE-H20 power adapter to CSE-H20 for power supply. If the LAN cable has been correctly
connected when power is supplied, LINK LED turns on.
3.2.3 Configuring CSE-H20
Configure CSE-H20 setting using ezManager, the ezTCP configuration program, as
follows.
Run ezManager, and click [Search All] button in the ezManager window. And, ezManager
program will search all CSE-H20s on the local network.
When ezTCP is searched, MAC address of the ezTCP is displayed on the [Search Result]
window (The MAC address is indicated at the bottom of the product case).
Select the corresponding MAC address, and set the variables considering your network
environment.
When no ezTCP is found, check the Windows firewall. If you press [Windows Firewall]
button in the ezManager, you can see the Windows Firewall menu directly.
For simple test, we recommend that the variables keep default values as shown in the

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below table.
Parameter Value
Network Local IP Address 10.1.0.1
Subnet Mask 255.0.0.0
Option Telnet Enabled
IP Address Search Enabled
Serial Port
(COM1/2)
Serial Type RS232
Baud Rate 19200bps
Parity NONE
Data Bits 8
Stop Bit 1
Flow NONE
Communication Mode
T2S – TCP Server
Local Port 1470/1471
3.2.4 Communication Test
Power the CSE-H20 off and on, then it tries to connect to the LAN.
A program for testing starts if you press the [Simple Test] button of the ezManager.

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Press the [Connect] button after inputting 10.1.0.1 and 1470 in the IP and Port. If
the TCP connection is established there will be “Connected [ 10.1.0.1 : 1470 ]. And the
STS indicator will be on.
Press the [Open] button after selecting serial port that is connected to the CSE-H20.
If the serial port is open, the “COM1 the COM port has opened” message will be shown.
If you press the [Send Data] button on the LAN part (Top), the data shown in the

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[Send] box will be transmitted to the [Receive] box on the RS232 part (Bottom).
If you press the [Send Data] button on the RS232 part (Bottom), the data shown in
the [Send] box will be transmitted to the [Receive] box on the LAN part.
If the transmitting and receiving data are same, the communication test is
successful.

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4 Configuring IP Address Variables
4.1 IP Address and Environmental Variables
For TCP/IP communication, you must set IP address related items. In addition, you have
to set serial port related items (serial port type, communication speed, data bit length,
parity bit, flow control, etc) to CSE-H20.
You can set the IP address and the serial port related items by using ezManager, the
supplied configuration utility which allows you to configure your CSE-H20 over the network,
or by using AT commands in ATC mode.
4.2 Configuring with ezManager
4.2.1 ezManager
The basic environmental variables (IP address related items, serial port items, and etc.)
can be set by ezManager which is an integrated management tool for Windows.
ezManager is operated in Microsoft Windows(Windows 98, 98 SE, 2000 Pro, ME, XP
Pro/Home, Vista). Following is the screen shot of ezManager which is just launched.
ezManager communicates UDP broadcast and its UDP ports are 50005 and 50006. Port
number 50005 is for setting and port number 50006 is for debugging. If you use any
firewall function, the ports have to be opened.

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4.2.2 Buttons of ezManager
Button Description
Read Read the values configured through MAC or IP address.
Write Store the changed values of parameters
Set Password Set or remove the password by this button.
Status Check the status of ezTCP in real time.
Factory Reset Initialize all the values as a default.
Debugging Message Make the ezTCP broadcast debugging messages.
Change F/W / HTML Change the firmware or HTML files with this button.
Export Variables Store a set of values as a file.
Import Variables Load values from a file made from [Export Variables]
Multi Write Configure a set of values to one or more ezTCP
PING/ARP Test the PING reply and manage the ARP table.
Simple Test Run the test program interfaced with Network and RS232 port.
Windows Firewall Run the windows firewall set window.
Exit Exit ezManager
4.2.3 Parameters of ezManager
Tap Section Parameters
Network
Network Local IP Address, Subnet Mask,
Gateway IP, DNS IP Address
Notify IP Change
Protocol, Interval, Port, Data Type, DDNS ID, DDNS
Password, Host Name(dyndns/custom)
Option
Obtain an IP From The First Received Packet,
Obtain an IP Automatically (DHCP),
Obtain an IP Automatically (PPPoE),
PPPoE ID, PPPoE Password,
Obtain DNS Server Address Automatically
Option
Option
Telnet, IP Address Search, Send MAC Address,
Debugging Message, SSL, SSH,
Multiple Connection
ezTCP Firewall
Allowed MAC Address, Allowed IP Range,
IP Address, Network Mask,
Apply To ezManager
Serial Port Serial Port Serial Type, TTL, Baud Rate, Parity, Data Bits, Stop
Bit, Flow Control, DTR/DSR, TX Interval

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TCP/IP
Communication Mode, Peer Address,
Peer Port, Local Port, Event Byte, Timeout,
Data Frame
4.2.4 Matters to be attended to
ezManager can be used when you want to change your device’s environment variables.
In case of CSE-H20, two interfaces are supported and those are Ethernet and RS232 port.
Using Ethernet Port
For use ezManager through Ethernet, CSE-H20 should be connected with PC on networks.
If they are located at the same network, [Search All], on the [MAC] tap, could be used with
MAC address. If they are connected on Internet, [Read], on the [IP] tap, could be used.
Using RS232 Port
For use ezManager through RS232, not only the CSE-H20 should be connected to PC
with RS232 cross cable but also has to be operated as serial configuration mode.
4.3 AT command
In ATC mode, the user can set environment variables through the serial port using AT
command.
 For more information, See “7. ATC Mode”.
4.4 IP Address Related Categories Settings via DHCP
In the network environment composing DHCP server, settings related to CSE-H20’s IP
address, subnet mask, gateway, and name servers can be automatically designated using
DHCP protocol. In order to do so, user must check [Obtain an IP Automatically (DHCP)]
category on ezManager. Depending on DHCP server type, [Obtain an IP from the First
Received Packet] category should also be checked as well.

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4.5 IP Address settings via PPPoE
PPPoE is used in most ADSL and VDSL. To use PPPoE function, PPPoE function should be
enabled and PPPoE ID and PPPoE password should be configured. The local IP address of
CSE-H20 is assigned automatically in PPPoE environment.
 Some ADSL or VDSL environment uses DHCP based on the modem type. Please contact
your internet service provider for further information.
4.6 Notify IP Change
In internet environment, most host get IP addresses dynamically. In this case, it is very
hard to communicate to the host because the IP address is changed dynamically. The IP
Change Trap service solves this problem. There are 3 types- DDNS, TCP and UDP- for this
service.
4.6.1 DDNS (Dynamic Domain Name System)
If the CSE-H20 obtains its IP address, it notices to the service provider. Then the service
provider serves DNS service. So, even though user doesn’t know the CSE-H20’s IP address,
user can connect to the CSE-H20 by the host name (after DNS looking up.) The DDNS
service provider that the CSE-H20 supports is only Dyndns (http://www.dyndns.com)
currently.
4.6.2 TCP/UDP
In addition, CSE-H20 can transmit some information to user’s TCP/UDP servers each
period which is set. This information is IP address, MAC address, product ID, firmware
version, and comment. The data can be sent as either ASCII or Hexadecimal type.
 For more details about the Notify IP Change, please refer to the document on our web site.
 For more details about the ezManager, please refer to the manual of ezManager on our
web site.