DataKinetics DSC110 User Manual page 26

4.3.3 Central processor card
The central processor card is a single board computer that runs the main
operating software for the converter. This includes the electrical interfaces to the
two serial ports and an integral floppy disk controller.
This processor runs the configuration and management software and the
signalling conversion software. The lower levels of the protocol software are run
on separate signalling cards.
On power up or following a system restart, the central processor card downloads
the operating code and configuration to each of the Signalling Processors cards
and configures the unit using the current configuration data.
Two different versions of the CPU card are in use. The KE18 card is used only on
Revision 1 DSC210 hardware whilst the KE30 card is a higher performance card
used on Revision 2 DSC210 hardware and the DSC110. Care should be taken to
use the correct spares.
4.3.4 Solid state memory card
The converter operating software is stored in flash memory on a solid state
memory card. The operating software comprises the operating system, the
operating program that includes the signalling converter functionality and the
operating code for each of the signalling processor cards. With the exception of
the operating system that remains fixed, all other operating software is updated in
a single operation.
Two different versions of the solid state memory card are in use. The KE17 card is
used in conjunction with KE18 CPU cards whilst KE37 is used in conjunction with
KE30 CPU cards.
4.3.5 Signalling Card Type CS6
Both network side (SS7) signalling cards and access side Q.931 signalling cards
are designated as CS6 type cards. The CS6 card provides two E1 2048kbit/s or 2
T1 1544kbit/s PCM line interfaces using either BNC connectors or RJ45
connectors.
Each signalling card contains a signalling processor that can handle up to two
signalling links or voice resources. The signalling card communicates with the
central processor using shared memory that appears in the memory map of the
central processor.
Timeslots from each PCM are routed to an inter-card PCM highway which uses a
ribbon cable connected along the top edge of all the signalling cards. This PCM
highway is used in conjunction with digital cross-connect switches on each
signalling card to allow any PCM timeslot to be routed to any signalling resource
within the converter or to any other PCM port in the converter. The inter-card PCM
highway is used for both voice connections and signalling connections.
DataKinetics DSC110 / DSC210 User Manual Issue 12 Page 26