SAMSUNG
General Description
DCS-816
March 1999
1 - 5
1.3 TECHNOLOGY
SWITCHING
System switching is accomplished by means of a custom IC "engine" that provides 256 switchable
digital channels. The engine is controlled by its own 16-bit Motorola
MC 68000 microprocessor
and switching control program. Each of the 256 digital channels is automatically assigned to carry
voice or data as required by system operation in a PCM format.
In addition to the 256 channels mentioned above, the system also utilises 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. DCS-816 is equipped with
one engine chip containing four (4) DSP channels.
The DSP channels are fully shared throughout the system as a common resource.
MEMORY
The systems operate using stored program control. This program is stored in EPROM chips. 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 on-board battery backup system.
MICROPROCESSORS
DCS-816 uses distributed processing. The primary system processor is a 16-bit Motorola
MC68000 operating at a clock speed of 8 MHz. Secondary processing is done in some special
cards, such as BRI, and also in the keysets. The digital keyset uses a Hitachi H8 processor for
data communication within the DCS-816.
1.4 PROGRAMMING
DCS-816 is self-configuring. This means that when the power is switched on, the system reads the
types and locations of all installed cards and telephones and assigns default data to them. This
data provides for system operation within seconds after power is switched on. All trunks and
stations are assigned according to the default numbering plan. This numbering plan is flexible and
may be changed to suit customer requirements. The installing technician customises these
default data to meet the end user's requirements.
The systems can be programmed from any LCD display keyset without interrupting system
operation. There are three levels of programming: technician (or system), customer and station.
The technician (system) level has access to all programs and can allow the customer access to
system programs as needed. Technician and customer access is controlled by different security
passcodes and access procedures.
DCS-816 also allows the use of a proprietary computer program called PCMMC. This permits 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.
Through the use of modems, PCMMC can access a DCS-816 system remotely (off-site) to make
database changes or perform uploads or downloads of the customer database as if the technician
were on-site.
