User manual
 Introduction 
Manual Documentation Number: ESP901-902_4105m  Chapter 1  5 
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com 
B&B Electronics Ltd – Westlink Commercial Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com 
Serial Server Quick Start Guide 
For descriptive purposes this Quick Start Guide considers a typical 
configuration consisting of a PC connected via an Ethernet LAN to an 
ESP901 or ESP902 Serial Server connected to the RS-232 port of a 
serial device. 
Hardware Setup 
Figure 2.  Typical Hardware Setup 
Step 1:  Connect  the  Serial Server to the network using a standard 
network cable. 
Step 2:  Connect  the 
Serial Server to the RS-232 port on the serial 
device. 
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If the serial device is configured as a DCE use a straight-through serial 
cable. If the serial device is configured as a DTE use a crossover (null 
modem) cable. 
Step 3:  Set all the DIP switches to the OFF position. 
Step 4:  Apply power to the 
Serial Server. 
Introduction 
6  Chapter 1  Manual Documentation Number: ESP901-902_4105m 
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com 
B&B Electronics Ltd – Westlink Commercial Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com 
Software Installation 
Using the CD included with the Serial Server, install the VLINX ESP 
Manager
 software on the configuring computer. 
Serial Server Configuration 
Step 1:  Open the ESP Manager software. It will automatically search 
for any reachable (ESP90x) Serial Servers. A list of all Serial 
Servers
 connected to the LAN will appear in the Serial 
Server List window. 
Step 2:  Double click the desired 
Serial Server port on the list to bring 
up the 
Server Properties configuration screen. 
Figure 3.  The Server Properties Window 
Step 3: Change the Server Properties as required. 
•  Enable 
DHCP to allow the Serial Server to generate its 
own IP address 
OR 
•  Obtain appropriate static 
IP,  Netmask and Gateway 
addresses from your Network Administrator 
(recommended) 
•  Set the 
Serial Port Mode property to RS-232 to match the 
serial device connected to the Serial Server. 
•  Set 
Baud Rate,  Data/Parity/Stop, and Flow Control to 
match the configuration of the serial device connected to 
the 
Serial Server port 
Step 4:  When the parameters have been set, click 
Update. Following 
the prompts in the dialogue boxes, 
Restart the Serial Server 
and Search all reachable servers again. 










