Specifications

73 / 80
PUK Personal unblocking key
PS/2 In this context: a mini DIN plug containing 6 pins, for connecting a keyboard
RX Received data, receiver
SCP Secure copy
SIM Subscriber identity module
SSH Secure shell
SSL Secure Sockets layer
Sub-D Subminiature D-type connector (typically for connecting analogue VGA monitor)
TCP Transmission Control Protocol
TCPDUMP A program that captures data packets for concurrent or later analysis
TP Twisted pair
TUN Tunnel, specifically an OpenVPN tunnel in Viola M2M solution
TX Transmitted data, transmitter
UDP User datagram protocol
URL Universal resource locator (usually known as "web link")
USB Universal serial bus
UTP Unshielded twisted pair
Webmin The graphical user interface of M2M GW
VPN Virtual private network
WAN Wide area network
20. Appendix D: Viola Systems’ device specific info
Find below a detailed explanation of device-specific features and instructions of parameters and
values for initial setup.
20.1. Arctic IEC-104 Gateway
Viola Arctic IEC-104 Gateway offers connectivity for devices of the IEC 60870 protocol family. The
IEC-104 is a vendor-independent communication standard for electricity industry. With Arctic IEC-
104 Gateway, the conventional IEC-101 serial devices can be attached to a modern TCP/IP based
IEC-104 control system.
The IEC-104 related settings:
• TX window size (k)
How many IEC-104 packets Arctic sends to IEC-104 master before waiting
acknowledgement
• RX window size (w)
How many IEC-104 packets Arctic receives from IEC-104 master before sending
acknowledgement
• I frames TX timeout (t1)
How many seconds to wait acknowledgement from IEC-104 master
• I frames RX timeout (t2)
How many seconds to wait from last received IEC-104 packet before sending
acknowledgement
• Link test interval (t3)
Interval for sending IEC-104 link test packets
• Suspended timeout
If the IEC-104 link is on suspended state over defined timeout Arctic will close the link
• Max sequence number
Defines the maximum sequence number used on IEC-104 communication
• Cause of transmission length
Size of IEC-104 Cause of transmission field length in bytes
• Common address length
Size of IEC-104 Common address field length in bytes
• Info object address length
Size of IEC-104 Information object address field length in bytes