Vodavi Starplus Dhs/dhs-e Technical Manual

							DHS-E Description3-1
DHS-E Description
System Technolog y
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. 
						

							3-2DHS-E Description
DHS-E  is expandable to meet a variety of applications. Regardless of the configuration, 
the system has sufficient resources to allow completely non-blocked access to all facilities 
(intercom and CO lines).
An external music source may be connected to each BGM/MOH Jacks via a 1/8 in. phono 
plug for BGM/MOH listening. All system features are supported by the equipment 
provided in the DHS-E  KSU. The Main Processor Board provides two Dual Tone Multi-
Frequency (DTMF) receivers and two Tone Detectors specifically for ECF, DISA, 
Unsupervised CO Line Conference, and Dial Tone Detection.
Connectors for SMDR and PC Programming are standard 9-pin RS-232 (serial) connectors. 
Connectors for Loud Bell Control, External Voice Paging, MOH and BGM are 1/8 phono-
type connectors.
The following system configurations are possible:
Telephone Components
†Digital Key Telephones (refer to System Components, in Chapter 2, DHS Description and 
Installation)
†2-Port Analog Adapter
†2-Port Analog Expansion
†DSS (Direct Station Selector) Console
SLT operations do NOT use System DTMF and Tone Detection 
resources.
Table 3-1: System Configurations
Equipment InstalledMaximum Number of 
Loop Start LinesMaximum Number of 
DHS-E Digital Key
Telephones
 Two 3 x 8 Modules 6 16
Three 3 x 8 Modules 9 24
Four 3 x 8 Modules 12 32
Five 3 x 8 Modules 15 40
Six 3 x 8 Modules 18 48
Key telephones are available in two  colors: Off-White and Charcoal Gray. 
						

							DHS-E Description3-3
System Administration
The systems 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-E Systems. This Software allows 
the user to program OFF/LINE and then the programmed data can be uploaded to the 
system. 
Key Service Unit
The DHS-E  KSU is a modular wall mount design. It is a self-contained cabinet with internal 
power supply, common control circuits (CPU board) and two 3 x 8 Modules (refer to 
Figure 3-1). The power supply AC transformer is hard-wire selected for either 117 V AC 
(+
10%). The KSU is designed for wall mount and shipped with a wall mounting template 
and hardware. The compact KSU weighs 26 lb. and is UL compliant. A KSU opening at the 
bottom of the KSU accommodates cable entry requirements through the outer housing 
for connection to the MDF.
Figure 3-1: DHS-E KSU 
						

							3-4DHS-E Description
Power Supply
The power supply circuitry of the DHS-E incorporates a linear design transformer with a 
choice of input voltage taps. The transformer primary windings are shipped wired for 
117V AC applications. Since the power supply is linear in design the output voltage varies 
between 21.6V DC and 32V DC depending on load and stability of the input voltage. The 
output voltage is delivered to the CPU board for distribution and rectified there for logic 
and control voltages.
Two fuses are equipped on the power supply board, one for AC input over-voltage 
protection and one for DC output over-voltage protection. A DPDT (Double Pole Double 
Throw) switch is accessible from outside of the KSU when the KSU cover is in place. The 
DPDT switch will simultaneously switch AC input and DC output circuits ON and OFF. In 
the event battery backup operation is desired and equipped via the optional Battery 
Charging Unit (BCU), the KSU switch may be used to switch OFF/ON power from both 
sources.
The power supply wiring harness is equipped with a Mate-n-lock connector on the DC 
output for connection to the BCU. When equipped, the BCU will maintain complete 
system operation during commercial power outages. A current draw/configuration chart 
is included in this document (refer to Table 3-11: Battery Sizing Chart ).
Central Processor Unit (CPU)
The CPU board is standard in the Basic KSU. This board contains all circuitry required to 
control the fully equipped DHS-E . Six bus connectors are provided where the station/CO 
line interface 3 x 8 Module is connected. All digital voice switching and call processing 
data switching is accomplished on the CPU board. The CPU board also contains a 2400 
baud modem for remote programming.
Modem
The built-in 2400 baud modem will work with DISA lines or transferred lines. It will not 
operate with Direct Ringing CO lines. Set the “RMT X_RATE” to 2400 baud.
3 x 8 Module
The 3 x 8 module provides interface of three loop-start CO lines and eight DHS-E  key 
telephones.
Each CO line circuit incorporates over-voltage protection, ring detector, loop detector, 
loop/pulse-dial relay, current sink circuit, coupling/isolation transformer (impedance 
600 ohms), hybrid circuit and combo (CODEC & filter) polarity guard circuit and radio 
frequency noise filter.
Each digital key telephone port is comprised of a proprietary transceiver designed using 
ISDN type 2B+D architecture.
Physical connection of stations and CO lines to the 3 x 8 module is made through one 
male 25-pair amphenol-type connector to the MDF (Main Distribution Frame). Station 
power and signaling to the digital key telephones are provided via a single twisted pair 
from the 3 x 8 module.
When installing a 3 x 8 Module in location CN4, the Extender Ribbon Cable that was supplied 
with the KSU must be utilized. Do not lose this cable; it is irreplacable. 
						

							DHS-E Description3-5
Figure 3-2: Firmware Caution
Figure 3-3: 3 x 8 Module
Although all existing 3 x 8 boards can be used when upgrading an existing DHS system, 
some pre-qualification must be performed. This pre-qualification will prevent noise 
problems on stations that can result from a firmware incompatibility issue. This issue can 
be corrected by obtaining the correct firmware from Vodavi (refer to 
Figure 3-2: Firmware 
Caution
 for further information).
Firmware
MFG Name
TEC9352
TC5649.1XXXX
LEGEND
XXXX= The firmware version. Once this
number is obtained, compare it to the
following to determine compatibility:
95xx-9736 (OK to install as is).
n 9737-9749 Must replace firmware with
n 9750 version (order PNSP7021-00).
n 9750 & above (OK to install as is). 
						

							3-6DHS-E Technical Specification Tables
DHS-E Technical Specification Tables
Table 3-2: Digital Hybrid System Capacities
Component Description
Customer Database memory protection 300 hr on a fully charged battery (the internal 
Nicad/Nimh battery requires 14 hr, of continuous 
system operation power be fully charged.)
Ports:
CO/PBX/Centrex Lines 18 
Digital Stations 48
Standard Single Line Telephones 94 
(Note: one digital port must be reserved for 
digital station operation. One digital station port 
is used for every two SLT ports required (refer to 
Ta b l e  3 - 1).
DSS 24 (1 per station)
DTMF Receivers:
2-Port Analog Adapter 2 (One for each SLT port)
2-Port Analog Expansion 2 (One for each SLT port)
Main Processor Board 2 (Shared for advanced call processing system 
features: DISA, ECF)
DTMF Senders Unlimited. (DTMF signal generation is derived 
from the core system tone resource. Tone 
combinations are available as needed.)
Tone Detectors (Used to monitor call 
progress tones; Busy Tone, Ring-back 
To n e )2 (Shared for advanced call processing system 
features; DISA, ECF, ABR. etc.)
Contacts 1 LBC contact is available.
Conference circuits 8 four-party conference circuits.
DISA circuits Any number of CO lines (to maximum 
configuration) may be programmed for DISA 
operation.
System Attendants 1 + 1 Alternate Position for overflow call handling. 
						

							DHS-E Technical Specification Tables3-7
Hunt Groups:
Members per group 8
Group Types 24
Pilot Hunt Group, All Ring Group or Voice Mail 
Group
Voice Mail Groups: 1 (Selected as VM type from HG.)
Members (ports) 24
Integration Method: In-band
VM Message Waiting [#] + [96] + station number to turn VM button LED 
ON.
[#] + [✳] + [96] + station number to turn VM 
button LED OFF.
VM Control Codes:
Disconnect Digit(s) 8 digits max.
Prefix for intercom calls 4 digits max.
Prefix for transferred calls 4 digits max.
Record Digits for Voice Recorder 
function4 max.
Suffix for intercom calls 2 max.
Suffix for transferred calls 2 max.
CO Line Loop Current sensing Interrupt programmable from 50ms to 2500ms.
Paging:
Internal Page Extension Groups 8
External Page Port (via Option 
Module)1
Internal All Call 1
System (Internal/External) All Call 1
System Speed Dialing 80 Total, 16 digits per bin.
Station Speed Dialing (DKT and SLT ) 20 Total per station, 16 digits per bin.
Last Number Redial 16 digits per stationTable 3-2: Digital Hybrid System Capacities (Continued) 
						

							3-8DHS-E Technical Specification Tables
Save Number Redial 16 digits per station
User Saved Number Redial 20 digits per station
Callback request per station 1
Camp On by a busy station 1
Stations Camped on to a station 1
Stations Camped on to a busy line 1
Message - Executive Notification: 6 preprogrammed
1 personal per station
Message - Executive Preprogrammed 6 preprogrammed
1 personal per station
Message Waiting 48 simultaneous
Name in Display 1 per station, 7 characters max.
Class Of Service (COS) 8 (0-7) per Day, 8 (0-7) per Night
To l l  R e s t r i c t i o n  To / Fr o m  Ta b l e s 1 0 0  e n t r i e s,  1 0  d i g i t s  p e r  e n t r y
Forced Verified Account Codes 100 bins, 8 digits max.
Unverified Account Codes 8 digits max.
Call Pick Up Groups 8 Extension Groups.
Station Lock Password 4 digits max. per station.
System Programming Password 6 digits (000000 at default).
System Reminder Alarm 8 time settings.
Station Alarm 1 per station.
Ring Schemes 3
Distinctive Ring Tones:
Station 4 (1-5)
CO Line 4 (0-4)
External Call Forward 1 incoming line, 1 outgoing line.
Changeable Numbers Options Station, CO, Hunt GroupsTable 3-2: Digital Hybrid System Capacities (Continued) 
						

							DHS-E Technical Specification Tables3-9
  
Table 3-3: Electrical Specifications
Component Description
AC Power source: Dedicated 117V AC (+
10%), 60Hz single 
phase
Power consumption: 1.5A max.  at 120V AC (180 W )
Power Supply fuse:
AC input
DC output2A 250V
1A 125V
Idle Channel Noise: -74 dB
Cross Talk Attenuation: 75 dB (at 1kHz)
Ringing Sensitivity: 40v RMS 25 Hz
Ringer Equivalence Number: 1.2B
CO Line Signaling: DTMF amplitude (-5 dB,-7 dB) +- 2 dB, at 
approx. 2 Vpp
Pulse Dialing ratio 60/40 at 10 PPS
Music source/Background Music: 0 dBm at 600 Ω
 input impedance
1/8 in. phono jack
Contact rating (Option Module LBC): 1A at 24V DC
1/8 in. phono jack
External Page Port 0 dBm at 600 Ω
1/8 in. phono jack
 Serial Ports 9-pin female RS-232 C
Table 3-4: Environmental Specifications
Requirements In Operation In Storage
Te m p e r a t u r e  K S U 3 2
 to 104o F
0 to 40o C-40 to 185
o F
-40 to 85o C 
Recommended Operating 
Te m p e r a t u r e :70 to 78
o F
Temperature Station Instruments 32 to 113o F
0 to 45o C-40 to 185
o F
-40 to 85o C 
Relative Humidity (non-condensing) 5 to 90% 5 to 90%
Heat Dissipation (BTU) 300
Altitude Up to 10,000 ft. Up to 40,000 ft.