Product specifications

1-7
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 systems also utilize 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. Each engine chip contains 4 DSP channels.
Four additional DSPs are added when a MISC card is installed. This means that the system contains a
total of 8 DSP channels when fully expanded. 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 or flash
menory. All specific customer data is stored in RAM(Random Access Memory) which is protected
against the loss of AC power to the system by an on–board battery backup system.
Microprocessors
iDCS 100 uses distributed processing. The primary processor of the system is a 16–bit Motorola
MC68000 operating at a clock speed of 16 MHz. Secondary processing is in the some special cards like
as BRI and also done in the keysets. The digital keyset uses a Hitachi H8 processor for data
communication within the iDCS 100.