Fire Safety & Security Products
Building Technologies
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10.2008
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DMS7000 Network Structures
1.1
Transmission Links
A communication network consists of transmission links between the Control Units
and the DMS7000 Control Centre. Several transmission types are available.
Communication network
CERBAN
(star connections)
Point-to-point connection between Control Units and Danger Management Sy-
stem.
Communication network CERLOOP
(ring connections)
All network members connected directly to a common bus.
Communication network CERTER
(star connections)
Normally restricted to serial interface connections to printers or interfaces be-
ween Central Processor and System Console.
1.2
Transmission Modes
Various types of modem are available and selection criteria include the required
transmission distance, the baud rate and local telephone authority regulations.
V24/28 Modem (RS232) [signal level converter]
Single or dual Modems for 4-wire connections up to 1000m depending on the
application: may be used in CERBAN, CERLOOP or CERTER.
FSK/PSK/QAM Modem
Single or dual Modems for 2-wire connections up to 10’000m depending on the
application: may be used in CERBAN or CERLOOP. The modems must be
programmed for the specific application (DIL-switches).
The following tables provide an overview over the various modem types, sho-
wing relevant applications and intercompatibility between individual mo-
dems.