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processor (ECP) is coupled with the primary processor expanding the system to 512 PCM
channels. Secondary processors are located on station and trunk cards. The tertiary level
CONTENTS
of processing is done in the keysets. The digital keysets use a Hitachi H8 processor for
data communication within the DCS 400si.
1.4 PROGRAMMING
The DCS 400si is a self-configuring system. This means that immediately after applying
power, the DCS 400si reads the types and locations of all installed cards and telephones
and assigns default data to them. This data provides for system operation minutes after
applying power. 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 customizes this default data to meet the end user's require-
ments.
The system can be programmed from any LCD display keyset without interrupting system
operation. There are three levels of programming: TECHNICIAN, 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 are controlled by differ-
ent security passcodes and access procedures. Station programming allows the individual
station user to set various options applicable to their station only. Keyset users have more
options than single line users. Each station user has their own passcode. The Customer
or Technician level programming can also be used to set individual station options.
The DCS 400si also provides for the use of a proprietary windows based computer pro-
gram 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
can be uploaded when required to restore the database.
Through the use of modems, PCMMC can access a DCS 400si system remotely (off-site)
to make database changes or perform uploads or downloads of the customer database
as if the technician were on-site.
1.5
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