Slip Protocol - Teldat REGESTA 1 Installation And Configuration Manual

1 Description
In IEC-101 mode, the REGESTA 1 behaves transparently, so that the traffic between both ends is monitored.
However, this does not implement any standard protocol over TCP/IP between the two routers.
Although normally the user scenario is similar to that indicated in the above figure, other types of environments can
exist where there is only one router with SCADA interface at one of the two ends, the other device being able to dir-
ectly access via the SCADA TCP/IP format for the protocol being used.
In certain types of communication networks, it might be necessary to limit the time in which the TCP sessions are
kept active. For example, in situations where GRPS is used as the TCP/IP transport method, depending on how the
telephony carrier bills, it might be more economical to not maintain the TCP sessions active. To do this, the SCADA
interface allows you to configure the time in which the router will maintain the TCP session after exchanging the last
message.
Some basic examples of connectivity have been given below. Scenarios can be created where some of the afore-
mentioned scenarios are given simultaneously.
(1) Basic Connection. A central Host connects to a Teldat router with SCADA interface. The remote end consists of
a serial RTU connected to a Teldat router with SCADA interface. In this case, the REGESTA 1 can be installed
as a router connected to the RTU.
Basic Connection
Fig. 4:
(2) HOST permitting TCP/IP connection. A central Host connects directly to an IP network supporting SCADA TCP/
IP CLIENT. The remote end consists of a serial RTU connected to a router with SCADA interface. In this case
the REGESTA 1 can be installed as a router connected to the RTU.
HOST permitting TCP/IP connection
Fig. 5:
(3) Remote device with a SLIP interface. A central Host directly connects to an IP network in TCP/IP CLIENT
mode. The other end consists of a Remote Terminal with a SLIP serial interface connected to a router. In this
case, the REGESTA 1 can be installed as a router connected to the RTU.
Remote device with a SLIP interface
Fig. 6:

1.2.1 SLIP Protocol

The SLIP protocol (Serial Line Internet Protocol) is an IP datagram transmission standard for serial lines. It was de-
signed to work over serial ports and modem connections. The specification for this can be found in RFC 1055.
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Teldat S.A.
REGESTA 1