Dhs-L General Description; System Technology; System Components - STARPLUS DHS-L Technical Manual

DHS- L Gener al D esc riptio n

DHS-L General Description

System Technology

The DHS-L
and call processing utilizing Pulse Code Modulation and Time Division Multiplexing
(PCM/TDM). The
terminals and terminal accessories throughout the entire product line. ISDN-like, 2B+D
technology complements the system architecture and capabilities. On one industry
standard twisted pair, key telephones perform all system functions and voice
communications. Some additional features of the
A non-blocking switch, with no loss or degradation of voice signals.
Stored-Program Control (SPC), utilizing a 8-bit, 16 MHz microprocessor.
Memory consists of 512 KB of Read Only Memory (ROM) and 256 KB of Random
Access Memory (RAM).
Battery Backed-Up RAM (128 KB)
When an analog device interface is required (and a DTIB-8 card is installed), a 2-Port
Single Line Adapter (SLA) may be connected to any one digital station port. The 2B+D
technology allows the
and the second voice channel (B2) to provide two independent SLT device interfaces.
The 2-Port SLA may be expanded with the 2-Port Analog Expansion (in the 2-Port CO
Module housing). The 2-Port SLA and 2-Port Analog Expansion each require one
dedicated digital station port.

System Components

KSU Components
The DHS-L
Service Unit (KSU) which houses the following KSU components:
Main Processing Board (MPB) (required)
Miscellaneous Interface Service Board (MISB) (required)
8- or 16-Circuit Digital Telephone Interface Board (DTIB-8 or 16)
16-Circuit Single Line Interface Board (SLIB)
16-Circuit Single Line Interface Board (SLIB) with Message Wait
8-Circuit Loop Start CO Line Board (LCOB)
Power Supply
product line incorporates state of the art digital technology for voice switching
DHS-L family is engineered to allow migration of the
DHS-L to split one digital key telephone port voice channel (B1)
The application of analogdevices in the
every single digital port used to interface a 2-Port SLA/Expansion, two analog ports are
available.
The SLA only works on the DTIB-8.
platform is comprised of three key telephone models and a modular Key
Chapter 2 - Description a nd Installation
DHS-L include:
DHS-L
has the effect of two-to-one port gain. For
2-3
DHS-L digital