Vodavi Starplus DHS, Техническое руководство

Страница: 82 / 338

DHS-E Description 3-1
DHS-E Description
System Technology
Incorporating state-of-the-art digital technology for voice switching and call processing,
the
DHS-E utilizes Pulse Code Modulation and Time Division Multiplexing (PCM/TDM).
The DHS-E family is engineered to allow migration of digital telephones and accessories
throughout the entire product line (refer to Digital Key Telephones, in Chapter 2, DHS
Description and Installation ). 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
DHS-E include:
†
A non-blocking switch, with no loss or degradation of voice signals.
†
Stored-Program Control (SPC), that utilizes a 16-bit, 10 MHz microprocessor.
†
Memory consists of 512 KB of ROM (Read-Only Memory) and 256 KB of RAM (Random
Access Memory).
When an analog device interface is required, a 2-Port Analog adapter may be connected
to any one digital station port. The 2B+D technology allows the
DHS-E to split one digital
key telephone port voice channel (B1) and the second voice channel (B2) to provide two
independent Single Line Telephone (SLT)-type device interfaces.
The 2-Port Analog Adapter may be expanded with the 2-Port Analog Expansion (in the 2-
Port Analog Adapter housing).
The 2-Port Analog Adapter and 2-Port Analog Expansion each require one dedicated
digital station port.
KSU Components
The DHS-E platform is comprised of three key telephone models and a modular Key
Service Unit (KSU) which houses the following KSU components:
†
CPU Module
†
3 x 8 Module (up to 6)
†
Modem
Four 3 x 8 Modules may be added to the two 3 x 8 Modules in the DHS-E KSU for a
maximum configuration of 18 x 48 Central Office (CO) lines or stations. In the standard
configuration, the KSU is equipped to service six CO Lines and 16
DHS digital key
telephones. The standard configuration is equipped to service two music channels for
use as Background Music and Music on Hold (BGM/MOH) and all system features. The
The application of analog devices in the
DHS-E
has the effect of two-to-one
port gain. For every single digital port used to interface a 2-Port Analog
Adapter/Expansion, 2 analog ports are available.
The 6-Port CO Module CANNOT be used in the
DHS-E
system.