Vodavi Starplus Dhs/dhs-e Technical Manual

1-4Toll Fraud and DISA Disclaimer 

2
DHS Description
and Installation
The STARPLUS DHS/DHS-E™ Digital Hybrid System is a full-featured digital key
telephone system. The common system architecture supports three digital
telephone models, a Direct Station Selector (DSS)  and an expandable analog
adaptor interface. The 
DHS is designed to meet the telecommunications needs of
small-to-medium sized business offices. 

DHS General Description2-1
DHS General Description
System Technolog y
The DHS product line incorporates state of the art digital technology for voice switching 
and call processing utilizing Pulse Code Modulation and Time Division Multiplexing 
(PCM/TDM). The DHS  family is engineered to allow migration of the DHS digital terminals 
and terminal accessories throughout the entire product line. ISDN-like, 2B+D technology 
complements the system architecture and capabilities. On one industry standard...

2-2DHS General Description
Two 3 x 8 Modules may be added to the initial 3 x 8 module in the Basic KSU. Alternately, 
a 6-Port CO Module may be substituted for one 3 x 8 module for greater flexibility. The 
maximum capacity is either 9 CO lines x 24 stations, or 12 CO lines x 16 stations. 
The basic KSU is equipped with a Standard Background Music/Music-On-Hold (BGM/
MOH) Module. An external music source may be connected to this interface via a 1/8 in. 
phono plug for BGM/MOH listening. The Option Module...

DHS General Description2-3
System Administration
The system default customer data base can be entered and changed, under password 
control, from any Executive Key Telephone. All Customer information is protected by an 
internal rechargeable NiCad or NiMh battery. Programmable password protection is 
allowed for each station, system administrator and external (DISA) callers. An optional PC 
Programming Software is available to program the DHS  system. This Software allows the 
user to program offline and...

2-4DHS General Description
Power Supply
The power supply circuitry of the DHS  incorporates a linear design transformer with a 
choice of input voltage taps. The transformer primary windings are shipped wired for 
117V AC applications; a factory insulated tap wire may alternatively be connected for 
230V AC applications. Since the power supply is linear in design the output voltage varies 
between 21.6 and 32V DC depending on load and stability of the input voltage. The 
output voltage is delivered to...

DHS General Description2-5
Figure 2-2: 3 x 8 Module
6-Port CO Module
The 6-Port CO Module may be installed in place of a 3 x 8 module in the last card position. 
The 6-Port CO Module interfaces with 6 loop-start CO lines. No digital station interface is 
provided on this module. The 6-Port CO Module is shipped with four mounting stand-offs 
used to install the board into the Basic KSU, two 6-conductor modular line cords and two 
6-conductor modular blocks. The mounting cords and modular blocks are used...

2-6DHS General Description
Standard MOH/BGM Module
The standard MOH/BGM Module is installed at the factory and used to interface with one 
external music source via an 1/8 in. phono type connector. This module must be 
removed if the optional module is installed.
Figure 2-4: MOH/BGM Module
Option Module
The Option Module replaces the standard MOH/BGM Module. The Option Module 
contains two DTMF receivers and two Tone Detectors that enable the following features: 
Dial Tone Detection, External Call...

DHS General Description2-7
Digital Key Telephones
The DHS and DHS-E support three proprietary digital key telephones (Basic, Enhanced 
and Executive). All key telephone models operate on one single twisted pair and provide 
D/A and A/D conversion at the terminal. These key telephones support hot key pad for 
dialing digits at any time.
Basic Key Telephone
The basic key telephone (refer to Figure 2-6) is equipped with a speaker for monitoring 
call progress and receiving call announcements but is not...