Dialogic D/41H Merkblatt

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05-0528-002 

 

 

Copyright © 1997  

Dialogic Corporation.  

All Rights Reserved. 

 

 

To reduce the risk of electric shock: 

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Switch off the power and remove power cords  
before opening the PC cover to install the D/41H or 
D/21H. 

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Do not re-attach power cords and switch on power 
to the computer while the PC cover is removed. 

Computer boards are static-sensitive and can be damaged 
by touching or handling them. To prevent damage from 
static electricity, do the following: 

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Wear a grounded, static-dissipative wrist-strap for 
the entire hardware installation. 

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Keep the board in its anti-static container when it is 
not being handled. 

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Work at a static-safe work area (see Figure 1). 

 

 

 

A static-safe work area consists of a grounded static-
dissipative wrist strap and a work surface covered with 
or composed of a grounded static-dissipative material. 
The work surface drains electrical charges from conduc-
tive materials when the materials are placed on the sur-
face. The grounded static-dissipative wrist strap drains 
static charge from the person wearing the strap. Both 
components ensure that static charges are drained at a 
rate and current level that are safe. Both must be used 
any time a person is handling any component.  

Your application software or Dialogic software release 
(hereinafter collectively called “voice software”) may 
have special installation or configuration instructions or 
requirements. Be sure to read all software documentation 
for any such instructions or requirements.  

You can install the D/41H or D/21H and voice software 
in any order, but Dialogic recommends that you install 
the voice software first when running in a Windows



 95 

or Windows NT



 environment, and the board first in 

any other operating system environment. 

You may be able to use the factory defaults when install-
ing the D/41H or D/21H board. Read through these 
instructions and check for possible hardware interrupt 
level (IRQ) and memory address conflicts between the 
D/41H or D/21H board and other software or hardware 
devices (for example, video card or CD ROM controller 
card) before installing the board.  

Note:  If you own a software utility that can determine 
what IRQs and memory addresses are in use, run it to 
help determine potential conflicts before installing the 
D/41H or D/21H. Some voice software includes such a 
software utility, or a separate board configuration utility, 
to help with the D/41H or D/21H installation and 
configuration. 

 

 

You can install up to 16 D/41H or D/21H boards in a 
system. One and only one board in a system can have 
the jumper on JP7 installed (see Figure 2): 

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One board: Leave the jumper on JP7 installed 

(default). 

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Multiple boards: Remove the jumper on JP7 from  

all but one board. 

  

1 2 3 4

S

W

1:1

S

W

1:2

S

W

1:3

JP

6

JP

5

IR

Q

2/9

IR

Q

3

IR

Q

4

IR

Q

5

IR

Q

7

IR

Q

10

IR

Q

10

IR

Q

11

IR

Q

12

JP

7

S

W

1

:4

 

Figure 2. Top edge view of SW1, JP5/6, JP1, and JP7 

The default hardware interrupt level setting (IRQ) is 
IRQ 9 (a jumper on JP1 pins labeled IRQ 2/9 as shown 
in Figure 2). Change the IRQ by moving the jumper on 
JP1 to another IRQ setting if IRQ 9 is already in use. 

Notes:  1) Set every D/41H, D/21H and compatible 

board in the system to the same IRQ level. 
2) Although the pins for IRQ 9 are labeled 
IRQ 2/9, IRQ 2 is not available for this board. 

 

Each D/41H, D/21H or compatible voice board installed 
in a computer must have a unique memory address 
consisting of a base memory address segment and an 
offset address.  

The default base memory address segment for the D/41H 
and D/21H is D000H (Hexadecimal). Generally, you 
should use the default unless there are more than eight 
boards in your system or if other non-Dialogic devices in 
your system must use the D000H segment. Select the 
base address memory segment with jumpers JP5 and JP6 
as follows: 

 

*

 

JP6 

JP5 

D000 
(default) 

 

removed 

removed 

A000 

†

 

 

removed 

installed 

B000 

†

 

 

installed 

installed 

C000 

‡

 

 

installed 

removed 

 

 

* Be aware of possible conflicts with devices that often 

use  
 

  these segments: † video adapters;  ‡ disk controller 

BIOS. 

The default offset address for the D/41H and D/21H is 
0000H. If you need to change an offset address, set the 
switches 1, 2, and 3 on SW1 (see Figure 2) as follows: 

 

— SW1: Switches — 

0000*  
(default) 

1 2 3 4

 

off 

off 

off 

2000* 

1 2 3 4

 

off 

off 

on 

4000* 

1 2 3 4

 

off 

on 

off 

6000* 

1 2 3 4

 

off 

on 

on 

8000 

1 2 3 4

 

on 

off 

off 

A000 

1 2 3 4

 

on 

off 

on 

C000 

1 2 3 4

 

on 

on 

off 

E000 

1 2 3 4

 

on 

on 

on 

 

* Base memory address segment B000H does not 

 

  support offset address settings 0000H – 6000H. 

 

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While you can set only one D/41H or D/21H board 
to an offset, you can set multiple boards to consecu-
tive offsets within a base memory segment as shown 
in the following example.  

 

Board  Base:Offset (Hex)  Lines 

1 
2 
3 
4 

D000:0000 
D000:2000 
D000:4000 
C000:A000 

1–4   
5–6   
7–10 
11–14 

D/41H 
D/21H 
D/41H 
D/41H 

 

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Write the IRQ level and memory address settings 
below for use when installing system software: 

 

 

 

 

 

JP 101

JP 1

JP7

S W1

JP5/ 6

J1

J2

J3

J4

JP 201

JP301

JP401

 

 

Function   

RJ-11 jacks for interface with PBX or  
central office (CO) lines * 

Jumper block to set interrupt level 

Jumper pins to set base memory  
segment 

Jumper pins to enable hardware interrupt 
circuitry for multiple boards 

Jumper pins to set ring detection threshold * 

Switches to set the offset address and default 
hook switch state 

 

*

 

J3, J4, JP301, and JP401 are not available 
on the D/21H board.