Specifications

CONTENTS
1.2
PART 1. SYSTEM OVERVIEW
1.1 SIZE AND CONFIGURATION
The DCS 50si is a digital ISDN compatible telephone system designed for small busi-
nesses. It can operate with the functionality of a square key system, PABX or a combina-
tion of both (hybrid). The DCS 50si employes the very latest DSP (Digital Signal Proces-
sor) digital technology.
The DCS 50si offers a variety of interface cards that allow connection to the public tele-
phone network or to private networks. These are generally referred to as trunk cards. Two
types of telephones can be connected to the system. Proprietary digital phones called
“keysets” connect to digital line interface cards (DLI). Standard telephones generally called
“single line sets” connect to single line interface cards (SLI). In addition, DLI station ports
are used to connect peripheral devices such as door phones and add-on modules. Mis-
cellaneous circuits are provided to allow such optional features as external paging, music
on hold, background music, common audible devices, alarms and emergency power fail-
ure telephones.
All DCS keysets utilize a single PCB with surface-mounted components assuring the highest
product quality and long life. Samsung’s customary large, easy-to-read displays and LEDs
in the button design make them much easier to use. In many instances, sophisticated
features are made simple through the use of friendly display prompts or push-on/push-off
feature keys.
Expanding the DCS 50si system is both economical and easy. Begin with the basic Key
Service Unit and then add an expansion cabinet as your business grows (
See Figure 1–
1). The KSU has 8 keyset ports and 3 universal card slots that can be used for stations,
trunks or 2x4 combination cards. In addition, the KSU has dedicated slots for a 2SLI card
and a miscellaneous function card. The expansion cabinet adds a further 3 universal slots
and a dedicated slot for a CADENCE CVM8A card. The systems low density card design
allows greater flexibility when configuring a system for the right combination of lines and
stations. A removable memory card (SMEM2 card) makes it convenient to upgrade to
future feature packages as well as providing quick and easy servicing. The maximum
quantities of the various station and trunk types can be seen in the table 1–1.