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Memory
The system operates using stored program control. This program is stored in EPROM chips
or flash memory. All specific customer data is stored in Random Access Memory (RAM)
which is protected against the loss of AC power to the system by an onboard battery back-up
system.
Microprocessors
iDCS100 uses distributed processing. The primary processor is a 16–bit Motorola
MC68000 operating at a clock speed of 16 MHz. Secondary processing is carried out in
some special cards, such as BRI, and also in keysets. Digital keysets use a Hitachi H8 proc-
essor for data communication.
Switching
The system provides 256 switchable digital channels. Each of the 256 digital channels is
automatically assigned to carry voice or data as required by system operation in a PCM for-
mat.
In addition to these channels, the system uses Digital Signal Processors (DSPs). Each DSP
may be configured by the switching control program as a DTMF sender, a DTMF receiver or
as a C.O. tone detector on a per–call basis. Four DSP channels are provided by default. Four
additional DSPs are added when a MISC card is installed. This means that the system con-
tains a total of eight DSP channels when fully expanded. The DSP channels are fully shared
throughout the system as a common resource.
Programming
iDCS100 is a self-configuring system. This means that immediately after applying power, the
system reads the types and locations of all installed interface cards and keysets and assigns
default data to them. All trunks and stations are assigned numbers according to the default
numbering plan. This numbering plan is flexible and may be changed to suit customer re-
quirements.
The system can be programmed from any LCD display keyset without interrupting system
operation. There are three levels of programming: technician (or system), customer and sta-
tion. The technician level has access to all programs and can allow the customer access to
system programs as needed. Technician and Customer access levels are controlled by dif-
ferent security passcodes and access procedures. Refer to the
Samsung Combined Pro-
gramming Manual for more information.
The system also allows the use of a proprietary computer program called PCMMC. This per-
mits a technician to program the system using a personal computer. PCMMC can be used
on-site to modify the customer database or to download (save) the entire customer database
to a file. This file can then be saved as a backup and be uploaded when required to restore
the database.
Using a modem, PCMMC can access the system remotely (off-site) to make changes to the
customer database or to perform uploads or downloads of the database as if the technician
were on-site.