Technical data

Glossary
Software
448 System Manual, 07/2009, C79000-G8976-C222-07
Conditional spontaneous message
In the dial-up network, you can specify whether or not a change causes a "conditional
spontaneous" or "unconditional spontaneous" transmission for each individual message.
Conditional spontaneous messages are initially only entered in the send buffer of the TIM.
They are only transmitted when a connection is established to the partner for whatever
reason, for example because an unconditional spontaneous message needs to be
transmitted or because the partner calls.
Even when using pay by volume transmission in a GPRS network, message prioritization
"conditional spontaneous" can also be used. Such a message is not transmitted
immediately, but is first buffered. In a GPRS network, the TIM stores "conditional
spontaneous" messages in the following situations:
● When the collected messages reach or exceed a size of 202 bytes.
● When an important message (priority "conditional spontaneous" or "alarm") needs to be
transmitted immediately.
● When the collected messages have not yet reached a volume of 202 bytes, but the
TCP/IP keepalive interval expires.
Configuration
During configuration, communication- and connection-specific system settings are made for
each device.
Counted value
A counted value (for example amount of flow) is acquired over a digital input as a pulse train
and totaled to produce a binary-coded value. A counted value is 2 words: 28 bits for the
binary-coded value 4 display bits.
CP
Communications processor
CPU
(Central Processing Unit)
The CPU handles the central sequential control and coordination of all activities of the
module.
CSD
(Circuit Switched Data)
Service in GSM for wireless transmission of data at 9 600 bps full duplex. Connections can
be established to other GSM devices, to analog modems or to ISDN modems in the fixed
network. The connection establishment can be started at both ends. Only dial-up
connections are supported.