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> Plus 811 (6680)

Main Features

  • Ethernet to serial 8 port RS232
  • Virtual Com Port driver for Windows
  • Secure Server with latest SSL/AES-256 encryption
  • Operation in Driver Mode, TCP/IP and many other
  • Quick Configuration over Driver and Browser
  • ESD protection on serial ports, Ethernet, DC power
  • 19" Rack and Wall mount options
  • Optional: Wireless network IEEE 802.11b/g/n
  • Optional: 3G/4G Modem for mobile networks
  • Optional: Power supply via Ethernet (model POE)
  • Port expansion over USB

VScom NetCom+ (Plus) 811, an octal port Serial Device Server for Ethernet/TCP to RS232


NetCom Plus 811
(NetCom 811, NetCom 811 PRO)

Quick Link: | Main Features | More Pictures | Overview | Ethernet Interface | Serial Interface | Serial Port Expansion | Software | Installation & Configuration | Security | viaVPN Remote Access (option) | Wireless interface (option) | 3G/4G Modem Interface (option, not on POE version) | Power Requirements | Housing and Mounting | Environmental Data | Standards | MTBF (Mean Time Between Failures) | Warranty | Open Source Software | Ordering Information | Options | Packaging | Download |


  More Pictures

VScom NetCom+ (Plus) 811, an octal port Serial Device Server for Ethernet/TCP to RS232                       
Click on the thumbnails to enlarge them …

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The Ethernet to Serial Gateways NetCom Plus connect RS232 or RS485 devices to a network running TCP/IP. These Serial Device Servers are rugged industrial devices with metal case and wall or 19"-Rack mounting, further supported by ESD protection on serial ports, power input and USB.
The NetCom+ 811 provides eight RS232 ports.

Windows Driver installs Com Ports

The driver for Windows operating system installs Virtual Com Ports. These operate in the same way as built-in ports, but via Ethernet or optional WLAN 802.11b/g/n. Easy-to-use Installation and Management software guides users trough the configuration.

High Speed Serial Ports, Low Power

The serial ports allow data rates of up to 12Mbps in RS422/485 or 1000kbps in RS232 modes. The ports also allow every non-standard bitrate up to 3.5Mbps, and many more (e.g. 5Mbps). See FAQ.
The USB 2.0 port supports USB-COM Plus modules, to add more standard or isolated serial ports. The USB port may also connect external WLAN.
The gateways demand 6W of power or less. The flexible input allows for various sources of customers choice. This includes Power-over-Ethernet in POE-models.

Easy Configuration, versatile Operation Modes

NetCom+ are configured over Driver Panels and WEB Browser. This is also possible via serial Port, Telnet or SNMP. NetCom+ provide Driver Mode, TCP/IP or UDP connection, and many operation modes beyond those.

Secure Remote Access for Monitoring

For NetCom Plus series there is a software option using the viaVPN Cloud system ( to be remotely accessed and monitored over Internet. viaVPN provides secure and strongly encrypted access, without any reconfiguration of existing firewalls. The access to the firmware via Ethernet or WLAN is extended by viaVPN over Internet, protected by a VPN tunnel. If the Com ports are not occupied by local access, also remote operation over Internet is possible.

  Ethernet Interface


100Mbps/10Mbps Auto-detecting


RJ45 (8P8C) 8 pin


Power, WLAN, Ready, Ethernet Link / Speed

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  Serial Interface

No. of Ports/Type

8 × RS232


DB-9 male


16kV ESD surge protection



Data bits

7, 8

Stop bits

1, 2


None, Even, Odd, Mark, Space

Flow Control



200 bps to 921.6/1000 kbps
POE version: 200 bps to 460.8/500 kbps
Supports non-standard baudrates


TxD/RxD for each port

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  Serial Port Expansion


USB 2.0 High Speed type A, 500mA @5V at rear side
Not available on PoE version NetCom Plus 811 POE

Expansion Options

Connect USB-4COM Plus (4 ports) or USB-8COM Plus (8 ports) devices to add more serial ports to NetCom Plus server, even electrically isolated versions

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Network Protocols

TCP, UDP, Telnet, PPP, DHCP, ICMP, UPnP, HTTP, LPD, SNMP V1/2c/3, DNS, openVPN

Virtual-COM Mode

Driver creates virtual COM ports via NetCom protocol © for
Windows XP/7/8/10, Win-Server 2003 to 2008 R2 (x86/x64)

Socket Modes

TCP RAW Server, TCP RAW Client, UDP Mode, Print Server
Automatic switching between Virtual-COM and TCP-RAW Server modes.

Tunnel Modes

Null Modem Tunnel and IP Modem

Fixed TTY Drivers

socat Tool, Linux OS

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  Installation & Configuration


NetCom Plus Manager automatically finds NetCom Plus devices in the local network.


With Network discovery enabled NetCom Plus servers announce their presence via UPnP making their IP visible.


via WEB-Browser, Driver Panels, NetCom Manager, serial console, Telnet console or SNMP


Virtual-COM mode works through firewalls

Firmware Update

via WEB Browser

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Password Protection

for all available configuration options e.g. via WEB-Browser

Secure Server

create openVPN™ tunnels, for encrypted transmission of all serial and configuration data using high security SSL/TLS standards.

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  viaVPN Remote Access (option)

Connect via Internet

viaVPN technology provides easy and secure access to remotely installed NetCom Plus servers for their configuration or for connecting their virtual COM ports through Internet. With the viaVPN option the NetCom Plus servers are no more limited to only work inside of a local network.


All communications use openVPN-tunnels encrypted by SSL/TLS and AES-256 standards.

Firewall friendly

No Reconfiguration of firewalls is required for viaVPN remote access.

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  Wireless interface (option)


2.4GHz Radio, supports IEEE Std. 802.11b/g/n

WLAN Modes

Access Point (AP) or Client (Station)

TX Power

Typ. 15.5dBm ±1.5 dBm @ 1Mbps (DSSS)
Typ. 15.5dBm ±1.5 dBm @ 11Mbps (OFDM)
Typ. 15.6dBm ±1.5 dBm @ 6Mbps (CCK)
Typ. 13.5dBm ±1.5 dBm @ 54Mbps (OFDM)
Typ. 13.4dBm ±1.5 dBm @ 6.5Mbps (OFDM)
Typ. 13.3dBm ±1.5 dBm @ 150 Mbps(OFDM)

RX Sensitivity

-95.6dBm @ 1Mbps, -88dBm @ 11Mbps
-91.3dBm @ 6Mbps, -74.2dBm @ 54 Mbps
-88.8dBm @ 6.5Mbps (20 MHz), -72dBm @ 72.2Mbps (20 MHz)

Transmission Rate

802.11b: 11Mbps
802.11g: 6 to 54Mbps
802.11n: 6.5 to 150Mbps

Transmission Distance

Up to 100m in open areas

Wireless security

  • WEP
  • WPA
  • WPA2
  • WPA2-Enterprise (IEEE 802.1X/RADIUS)

Antenna Connector

RP (Reverse-Polarity) SMA

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  3G/4G Modem Interface (option, not on POE version)

mPCIe Slot

Built-in internal Mini PCI Express Slot connected to USB 2.0 HS
3.3V at mPCIe slot is switched ON/OFF via firmware to securely reset 3G/4G modems

SIM Slot

Built-in internal SIM Card slot

3G/4G Modems

Different 3G/4G Modem models are supported by NetCom Plus firmware

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  Power Requirements

Input Voltage

9 - 54V DC
POE: 15 - 54V DC

Power Consumption

0.4A @ 12V, 5W max
POE: 0.4A @ 19V, 8W max


3-pin Terminal Block

Power over Ethernet

PoE Class 0 Device, IEEE, 8W max.
Automatic switch between PoE and local power
for POE Version only

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  Housing and Mounting


0.8mm sheet metal


w/o box 0.9kg; w/h box 1.5kg


196×147×44 mm³ (W×L×H)


310×192×60 mm³


  • 19-inch Rack
  • Wall mount

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  Environmental Data

Operating Temp

−20°C - 65°C

Storage Temp

−20°C – 85°C

Ambient Humidity

5-95% non condensing

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  • EN 55022 Class B
  • EN 61000-3-2: Limits of harmonic current emissions
  • EN 61000-3-3: Limitation of voltage changes
  • 47 CFR FCC Part 15 Subpart B

EMS (EN 55024)

  • EN 61000-4-3: Radiated RFI
  • EN 61000-4-4: Electrical Fast Transient
  • EN 61000-4-5: Surge
  • EN 61000-4-6: Induced RFI
  • EN 61000-4-8: Power Frequency Magnetic Field
  • EN 61000-4-11: Power supply dips


EN 61000-4-2 4kV contact 8kV air for

  • Serial Ports
  • USB
  • Ethernet
  • DC Power connector

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  MTBF (Mean Time Between Failures)


21.4 Years @ 25°C
8.9 Years @ 45°C

MTBF POE version

20.4 Years @ 25°C
8.5 Years @ 45°C


Telcordia (Bellcore) Standard; RelCalc. 5.0 BELL-7

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Warranty Period

2 years

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  Open Source Software


This product uses open source software to fulfill part of its functions. Licenses for the open source software are granted under the GNU General Public License in various versions. For details about those see the information in the firmware download and

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  Ordering Information


NetCom Plus 811 (8x RS232, expandable)


NetCom Plus 811 POE (8x RS232, supply via Ethernet)

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Power adapter 110-230V AC to 12V @1A, DC, EU plug


Power adapter 110-230V AC to 12V @1A, DC, US plug


Power adapter 110-230V AC to 15V @1A, DC, EU plug


Activate option viaVPN for secure remote access over Internet


WLAN Kit internal
internal module 802.11b/g/n, pigtail and antenna
Purchase time option, not for later retrofitting


3G-Modem GSM/UMTS/HSDPA for mPCIe incl. IPEX cable & SMA Antenna


4G-Modem LTE for mPCIe incl. IPEX cable & SMA Antenna


DK 35A Plastic DIN-Rail mounting kit


DB9F-to-RJ45 for changing from DB9 to CAT5 wiring
(Optimised for RS422/485 operating modes)


RJ45-to-DB9M for changing back from CAT5 to DB9 wiring
(Required to match the DB9 pinout at NetCom Plus)


Serial Null-Modem adapter 9PF-9PF, change male to female

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Packing list

  • NetCom Plus Serial Device Server
  • Terminal block for Power Supply
  • 19-inch Rack Mounting brackets
  • Wall mounting kit

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 (Driver Installer (version   November 2 2018))
 (Driver Installer (version   November 2 2018))
 (Driver Installer (WHQL version   December 10 2007))
 (Release February 2022)
 (Edition: May 2022)
 (Firmware 3.4.8)
 (Firmware version 4.0.2 (January 13 2023), Upgrade from v3.4.8)
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* Specifications are subject to change without notice.
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Copyright © 2005-2023, VS Vision Systems GmbH. All Rights Reserved.