OVERVIEW

Possible causes of internal modem problems.

1. The modem is getting no power.
2. There is a faulty motherboard.
3. There is a conflict with a COM port.
4. The software is incorrectly set up.
5. The switches on the modem are incorrectly set up.
6. The modem is being incorrectly initialised.
7. There is a bad phone line or phone cable.
8. There is a bad connection.
9. The modem is faulty.
10. A software conflict is occurring. These kind of programs are major offenders and cause a lot of FAX/MODEM problems. Anywhere from GPFs to system Lockups.

How to test a modem for dropped calls

Firstly find the access number of the service which you are having difficulty in connecting to. In Windows-95 it will be found under 'Properties' in dial-up networking for your ISP connection.

Use the SuperTerminal software (which is shipped with the modem). Run SuperTerminal then click on Settings, Communications; ensure the speed is set to 1 15200bps, and hardware flow control is selected.

Type AT<enter> and the modem should respond with an OK response.

Then type AT&F%UlW1<enter>. This will set up your modem as required for a K56flex connection.

Then enter ATDT, followed by the access number, which you found in step 1) above. For example, type ATDT08450798777<enter>

The modem will now dial the access number, you may hear it dialling the digits, followed by 'modem-hissing-noises' as the remote modem answers and the two modems negotiate. Don't press any keys at this stage, as that will cause the process to abort. This process may take up to 1 minute.

At the end of this process, the speaker will go quiet and a message will be show the CARRIER speed, and a CONNECT message. Note the carrier speed.

The ISP's software will usually prompt for a username and password, that won't be needed for this test; just type in any characters. Check that as you type in characters that they are shown immediately (usually as * for passwords)

After about two minutes (or three incorrect passwords) the remote modem will usually end the call. At which point you will see a NO CARRIER message on the screen.

If you saw the following:-
    a carrier speed of greater than 40000
    each password/username character was displayed immediately the call was held up for at least a minute with no degradation. Then the modem hardware is working correctly

If these tests are passed, and the problems persist, you should look at your port settings in Dial-up Networking. The speed should be 115200 and the flow control should be HARDWARE (sometimes called RTS/CTS)

If SuperTerminal indicates that it cannot connect to the COM port: -

Ensure that it us using the same COM port on which your modem is set. You can find this in Windows-95 by going to Control Panel, Modems, Diagnostics, you will then see a list of the COM ports showing the Modem COM port number (often COM3 or COM4)

If the Carrier speed is 33600 or less:-

Check that you are actually using a '56Kflex' access number for the service
provider (you may need to ask or refer to your service provider's documentation).
It is possible that the access number is for X2 or V90 modulation, rather than
K56flex.

If the carrier speed is between 32000 and 40000

This indicates that the modem is not performing as well as it might do on your line. This may is a combination of line characteristics, the remote modem and your modem. If your modem has an early version of K56flex code, it may be worth 'Flash-upgrading' your modem to a later code version; see our

COM ports.

The PCV Internal Non-PnP 56k/V90 has its COM port set by DIL switches on the board. These are factory set as COM4.

The PCVC PnP Camera ready 56K/V90 is a plug and play device, so its COM port is assigned by the PC's plug & play BIOS as the PC boots up.

Modem Operation

Dialling - A modem uses the whole telephone line, just the same as a person talking on a telephone. So where there are multiple devices on one line, perhaps several phone handsets and a fax machine, then the modem can only use the line if no other device is using the phone line at the same time. In fact lifting one of the other handsets may cause enough interference to cause the modem to drop the call.

Note that while the PC user is accessing the Internet, none of the other phone handsets can be used, and anyone trying to dial-in will receive an engaged tone. If BT 'call-waiting' is enabled on the line, the 'call-waiting' tones which get generated can sometimes cause the modem to drop the call.

In principle for outgoing calls you can have as many telephone devices as you like on a line, provided you only use one at a time; however there is a restriction applicable to incoming calls and the RINGING signal, see below.

Answering - There is a limit to the number of devices which will detect a RING signal from the telephone exchange. Technically the limit applies to the sum of the REN values for all devices connected to the line which must not exceed 4. Each phone handset has a REN of 1 (unless marked otherwise) and the PCV and PCVC modems have a REN of 1. So generally there should be no more than four devices connected to a line. If too many devices are on a line, then the normal effect is to stop one or all of the handsets emitting their correct RING tone, or for a modem to not see the incoming RINGING signal.

Note that modems need to have four wires connected into the main BT (or cable) termination box. So if someone has extended the line and only used a 2-wire cable (which will work with many phones), then any modem on that extension will not see the RING signal (hence will not auto-answer)
Note also that not all modem manufacturer's line-cords (the cable which plugs into the wall-socket) are the same, so it is important to only use the cable which came with the modem.

Using modems outside the UK

Despite steps to European harmonisation, modems are different in each country. The PCV and PCVC modems are specifically designed for UK operation and are only BABT approved for operation in the UK.

It is possible to use UK modems in other countries (although they won't be approved) by using special line-cords and modem settings. The best company to advise on any such requirements is Tele-Adapt (on 0181 233 3000)


Limitations of modem operation on the Operating System and PC-applications environment

Because the internal modem emulates a COM port in hardware, it simply uses the Windows standard serial port drivers. This makes it unlikely to have a conflict with other software in the PC.

Despite Windows-95's efforts at peripheral sharing between applications, there is likely to be an occasion where an application can't use a modem because another application is still attached to the port. This is most likely to happen with 16-bit applications (e.g. Supervoice). The problem will appear as a 'COM3 already Open' error (or similar). The simple resolution is to close the application, which is holding on to the COM port.

List Of Reasons For 'Can't Open Comm Port Error' Message
1.Talking to the wrong comm port
2. IRQ conflict
3. Installing new modem before removing old one.
4. Another application running at the same time ,using the same com port.

List Of Reasons For Dropped Calls Dropped Calls
1. Line Noise
2. Old modem code (try flash upgrade)
3. Someone picking up on same line
4. Call Waiting
5. ISP problems
6. Incorrect flow control
7. DTR not connected (this only applies to our desktop modems)

What to do when your modem is telling you there is NO DIALTONE

The NO DIALTONE message from your modem occurs when the modem goes to dial a call but doesn't detect the dial-tone signal from the Telephone Exchange. It's the same situation when you pick up the handset to make a call, and listen for a dialtone signal; if you don't hear dialtone you can't make a call so you stop at that point.

Before you carry out the test below, it's worth considering the following questions:-

a) Is the modem on an analogue line ? Many company switchboards now have digital handsets, a modem is an analogue device which won't work on such extensions. You will either need a dedicated line or an analogue adapter for your PABX.

b) Are you using the modem outside the UK ? In order to get approved in the UK, the modem has to be fairly specific about exactly what constitutes a valid dialtone It is possible that non-standard PABXs (company switchboards) or different (non-BT) Telephone exchanges might give out a tone which the modem doesn't recognise as 'dialtone' Other countries have dialtones with different characteristics, which the modem may not recognise as UK dialtone. In these cases see 'Blind Dialling' below.

b) Are you using the line-cord (cable between modem and BT/Telco socket) which was supplied with the modem (because not all modem cables are the same). ?

c) Do you have a 'feature-setting' on your phone e.g. call forwarding or similar. Many systems give out a 'broken' dialtone in this case, which the modem will not recognise as a valid dialtone. You will have to use 'Blind Dialling', see below.

d) If another person or device (e.g. a fax machine) is using the line, you won't have a dialtone, in this case you will have to wait for them to finish before making your call.


If none of the above points apply, then you can use the test below to find what's causing the problem.

1 . Connect the grey cable directly between your modem and the BT phone socket .

2 . Connect your phone directly to the white TEL socket on your modem.

3 . Pick up your phone receiver and listen for a tone .If you don't hear dialtone, that will account for the error message from your modem. Check all your wiring connections. Try moving the modem connection to another phone socket.

4 . If you do hear dialtone, then the following steps will determine if the modem is connecting correctly to the line.

5 . Go to Superterminal (part of Supervoice) and click on Settings, Communications. Select the COM port for your modem and make sure your baud rate is set to 115200. Click OK.

6. Using the phone handset which is connected to the modem's rear panel, call a friend and check that you can hear your friend's voice. Keeping your friend on the line, type in ATL0A <enter> from the Superterminal screen. (Ensure you type a 'zero' between the 'L' and the 'A'). You should both hear a series of beeps and whistles which will stop if you press any key. If this is what you hear, then your modem hardware is functioning correctly. It would be worth using Blind Dial if you are still experiencing NO DIALTONE problems.


Blind Dialling

This is the term used when the modem is told not to test for dialtone, but to simply 'lift the receiver and dial, assuming that an exchange is on the other end of the line.

'Blind dialling' can be set up by including the characters X1 in the dial-string or initialisation-string in your comms software (e.g. dial-up networking).

Procedure for locating problems with Internal Non-PnP modems

1. Get the exact error message/situation.

2. Make sure that there is not anything in the system that could be causing conflicts.

3. Check the phone line by attaching a phone to the line and listening. Check for static and dial tone. Ensure it can dial out.Fix any bad connections, phone cable, or phone line. Verify there is no conflict with call waiting.

4. Boot the computer to a A:> prompt. If it will not boot, troubleshoot this as a separate issue.

5. To check if the modem is picking up the line and dialing correctly, at the DOS prompt type:

ECHO AT&FX1DT555 > COMx: (where x is the correct COM port)

This will reset the modem to factory defaults (&F), have it ignore dialtone detection (X1) and dial 555 using tone (DT555), by telling DOS to ECHO the string to the COM port.

The modem should pickup the line and dial the number. Warn the client to keep the
earpiece away from their ear due to the possible loud volume of the tones. The modem will stay off hook for approximately 30 seconds. If the client presses F3 and ENTER, the modem will immediately hang up.

6. Verify that any jumpers and/or switches on the modem are set up correctly.

7. Verify that the on board COM port to which the modem is addressed is disabled, if applicable.

8. Use DEBUG to verify the COM port the modem is attached to is enabled. If it is not troubleshoot as a separate situation.

NOTE: The first COM port will usually be in the left most position in the DEBUG list. This is not always COM1. An example of this is when a DB modem is set to COM3, and the RS232 serial port is set to COM2, DOS will back fill the active COM ports, so COM2 will show as COM1 to DOS, but its address will still be F802.

A. DEBUG<Enter>

B. D 40:00<Enter>

C. You will get a display like this:
The address shown actually belong to the correspondent com port.

| com1 |com2 | com3 | com4|
0040:0000 F8 03 F8 02 E8 03 E8 02-78 03 00 00 00 00 1F 05
0040:0010 61 C4 B0 7C 02 00 01 60-00 00 2A 00 2A 00 34 05
..... etc.

D. F8 03 shows COM1 active, F8 02 shows COM2 active, E8 03 shows COM3 active, E8 02 shows COM4 active.

E. Q<Enter> to exit DEBUG.

9. Verify there is no COM port conflicts with any other hardware. To test for conflicts, run DEBUG and at the - prompt type the commands listed in the DEBUG TEST column in the chart below:

NOTE: 1. IxFA/IxEA polls the Interrupt Identification Registers.

2. IxFE/IxEE polls the Modem Status Register.

3. A fax modem may not always respond with B0 when the Modem status is tested, it may respond with 01 as if it were a standard modem.

4. On PB410/PB420/PB420T systems the COM3/COM4 addresses can be changed, if this is the case substitute the appropriate addresses for the Ixxx test. The formula is the base address plus 2h. Since the possible addresses are 3E8/2E8, 338/238, 220/228, 2E8/3E8, use the following substitutions:

A. If the addresses are set to 3E8/2E8 use I3EA for COM3 and I2EA for COM4,

B. If the addresses are set to 338/238 use I33A for COM3 and I23A for COM4,

C. If the addresses are set to 220/228 use I222 for COM3 and I22A for COM4,

D. If the addresses are set to 2E8/3E8 use I2EA for COM3 and I3EA for COM4.

_____________________________________________________________
| PORT | DEBUG | MODEM | FAX MODEM | SERIAL PORT | NOT | CONFLICT |
| | TEST | PRESENT | PRESENT | PRESENT | PRESENT | |
| COM1 | I3FA | 01 | 01 | 01 | FF | Anything Else |
| | I3FE | 30 | B0 | 00 OR 0B | FF | Not Tested |
| COM2 | I2FA | 01 | 01 | 01 | FF | Anything Else |
| | I2FE | 30 | B0 | 00 OR 0B | FF | Not Tested |
| COM3 | I3EA | 01 | 01 | 01 | FF | Anything Else |
| | I3EE | 30 | B0 | 00 OR 0B | FF | Not Tested |
| COM4 | I2EA | 01 | 01 | 01 | FF | Anything Else |
| | I2EE | 30 | B0 | 00 OR 0B | FF | Not Tested |

10. Ensure the software that was packaged with the computer is being used (such as Lotus Works for DOS or Windows Terminal). Verify the software is correctly set up. Reinstall if needed.

11. Type <AT> <Enter> in terminal mode and verify an 'Ok' is returned. If 'OK' is not returned, and the software was reinstalled in step 10, then the modem is not functioning correctly.

12. If all of the above failed, set up the appropriate service.

GENERAL MODEM TROUBLESHOOTING:

INTERNAL MODEMS

The following information will require modem instructions for COM port and interrupt request
(IRQ) assignment.

The fail safe procedure is to disable or change the settings of the device using either COM1 or
COM2 and set the modem to this COM port. Then set the modem to the appropriate IRQ setting (COM1-IRQ4, COM2-IRQ3). If this is not possible, or it is unsure whether the COM port is unused, the following steps will guide you through the installation.

STEP 1: Determine what COM port address is available.

a) remove the internal modem from the system.
b) clean boot the system to a c: prompt.
c) change to the DOS directory.
d) type DEBUG (the prompt will show as a hyphen '-')    After the hyphen, type the following:

I3fa< ('<' indicates a carriage return)
I2fa<
I3ea<
I2ea<
q< (this will return the user back to the c: prompt)
   
After RETURN is pressed after each line, two characters will appear below the line.

FF indicates that there is a device present on that port address. Any other characters indicate that the address is in use.

If one of the lines above returns an FF then continue to STEP 2.

e) If none of the lines returns an FF, this indicates that all 4 serial port addresses
are in use by other devices.The user needs to remove a serial device from his system, this could be serial ports, existing internal modems, video cards, sound cards with built-in answering devices.

STEP 2 Assigning a Communication Address to the modem.

The 'I' in the DEBUG procedure outlined above allows an inquiry of the port address.

I3fa returns the value stored in the com1 port address.
I2fa ... com2
I3ea ... com3
I3fa ... com4

When the inquiry returns an FF for a com Port, this indicates that a device can be
assigned to it without conflicting with another device.

a) Set the modem for the open port address.

STEP 3 Determining the interrupt request (IRQ) of a modem.

An interrupt request or IRQ must be assigned to the modem. As with any device In the system, the modem must have it's own unique IRQ setting.

An industry standard has been assigned to COM1-IRQ 4 and COM2-IRQ3 ports. COM3 and
COM4 are assigned defactor (or industry agreed upon) standards.

If the system has a device on COM1 and COM2, it is safe to assume that IRQ 4 and
IRQ 3 are in use. If this is the case, an alternate IRQ must be used for the modem.

In the following information, the term 'active' is used to refer to a device that
is used by the system and can't be disabled.

In most cases, COM1 and/or COM2 could be in use, but not 'active'. If this is the case, the device could be disabled and the modem assigned to it's settings.

If both COM1 and COM2 are in use by other devices in the system, then COM3 or COM4
are the next choice. Again, IRQ 4 and 3 can not be used in most cases, if COM1 and COM2 are active. Other choices depend on the settings available to the modem. Most options include, but are not limit-ed to IRQ 5, 7, 10, and 11.
   
CAUTION must be taken when assigning the modem to one of these other IRQ settings. Various devices might already have one of these interrupts in use. A list of other devices and their assigned IRQs should be made.**BE AWARE** that IRQ assignment is not limited to hardware, but virtual software drivers in windows utilise an IRQ setting as well. Software limit-
ations should also be considered when using a IRQ that is not commonly used for a communication device. Most DOS software will not detect a modem on an IRQ other than 3 or 4. With this information, a IRQ can be assigned to the modem.

WINDOWS 3.1 and 3.11 setup.

Windows PORT setup should be verified before installation communication software.

Accessing the PORT properties in Windows:
   
From the Program Manager, OPEN the MAIN group.Double-click on the CONTROL PANEL icon.In the CONTROL PANEL, double-click on the PORTicon.COM 1 will always be the highlighted port when opening the PORT control center.Click once on the desired port, click on the SETTINGS button, then click on the ADVANCED button.This screen will show the Address and the IRQ setting of each port:

COM1 - ADDRESS 03F8, IRQ4
COM2 - ADDRESS 02F8, IRQ3
COM3 - ADDRESS 03E8, IRQ4
COM4 - ADDRESS 02E8, IRQ3

If any of these settings display the word 'default' or has another value than is actually assigned it should be changed to it's correct value. This is usually the IRQ that isn't assigned properly.

When all changes are made. Windows should be restarted.

The SYSTEM.INI file should now be edited and a search for the COMM.DRV should be made.
The line must look like the following:
COMM.DRV=COMM.DRV

If it does not, it should be changed. Now the communication software can be in-
stalled in the system
************************************************

COM port problems:

    When the modem is assigned to a COM port address above a port that is not active
(i.e. COM4-modem, com3-nothing) a phenomenon known as 'address packing' might occur. When this happens, the address of the device on higher COM port address becomes the lower port assignment (i.e. COM4-02E8, COM3-02E8.) This will create a problem because the IRQ settings remain them same, therefore the device is now sending information during two INTERRUPT REQUESTS.

The following DEBUG procedure fixes this problem:
Create a text file called FIXCOM.DBG with the DOS editor. This text in the file should be exactly as follows:
E40:0
F8 03 F8 02 E8 03 E8 02
q

Save the file and exit the editor.

Now edit the AUTOEXEC.BAT file and add the line:
DEBUG < FIXCOM.DBG
This will alleviate this problem.

Install the EXTERNAL Modem with Windows NT4.0

1. Turn off your PC. Connect the modem power adapter to the power
surge protector and the power jack connector connects to the back
of the External modem labeled "POWER".
2. Connect the modem serial cable to the back of the modem and the
other end connect to the back of your PC (Com port 2). Turn
on your modem power.
3. Turn on your PC. Press <Ctrl+Alt+Del> at the same time to get
into your Windows. Insert Windows NT 4.0 CD-ROM into Your CD-ROM drive.
4. At the Windows NT4.0 CD-ROM, choose <Browse> the CD. Drill
down to \drvlib\pnpisa\x86\pnpisa. Right click the PnPISA
file and select install from the pop up menu. Reboot your
computer. Install the update service pack 3 for the Windows NT4.0.
5. Hit the <Delete> key on your keyboard. Go to Chipset Feature or
Integrated Peripherals option. Enable onboard serial port 2
base I/O address 02F8), Irq 3 on your motherboard CMOS set up.
See your motherboard User's Manual.
6. Boot up to Windows NT, press <Ctrl+Alt+Del> at the same time to
get into your Windows. Click on <Start>, <Setting...>,
<Control Panel>. Double click on <Port>. Add COM port. Click
<Add>, and select the following list:
Com port number : 2
Base I/O Port Address: 02F8
Interrupt Request Line(IRQ): 3
FIFO: Default (check mark)
Click <OK>. System Setting Change screen pops up. Click on
<Restart your Windows now>.
7. Boot up to Windows NT4.0 press <Ctrl+Alt+Del> at the same time
to get into your Windows. Click on <Start>, <Settings>, and click
on <Control Panel>. Double click on <Modems> icon. Install New
Modem screen will pop up. DO NOT make any change or put a check
mark on "Don't detect detect my modem, I will select it from the
list". Click <Next>.
8. Windows will detect your modem as a "Standard Modem", click
<Change...>, and click on <Have Disk>. Insert the driver
CD into your CD Drive and click <OK>. Click on 370svs.inf the Select your modem driver
"Rockwell RSS/Rockwell RC56D2 Serial Modem" or "56Modem" and click
<OK>. Click on <Next>. Modem Setup screen will pop up. Click
<OK> and click on <Finish>. Click <Close>.
9. Go to Control Panel, double click on the <Network> Icon. Click on
<Services tab>. Add RAS. Click <Add>, select
<Remote Access Service> and click <OK>. Ras Device found
"Com 2 - Rockwell RC56D2 Serial Modem". Click
<OK>. Insert your Windows NT4.0 CD-ROM, into your CD-ROM driv and
close the Windows menu and click <Continue...>. Add Ras Device
screen pops up. RAS Capable showed "Rockwell RC56D2 Serial Modem" click <OK>.
10. At Remote Access setup. Click <Configure...> select your
Port Usage and click <OK>. 11. Click on <Network>.
Network Configuration:
+--------------------------------------------------------------+
|Dial out Protocols : TCP/IP |
+--------------------------------------------------------------+   
|Allow Remote Clients Running : TCP/IP |
+--------------------------------------------------------------+   
|Encryption Settings :    Require Microsoft encrypted |
| authentication |
+--------------------------------------------------------------+   
|Require Data encryption :    Blank |
+--------------------------------------------------------------+   
|Enable Mutilink :    Blank |
+--------------------------------------------------------------+
Click <OK>. Click <Continue...>, click <OK>, click <Close> and click
on <Yes>. Restart your computer now.Note:
For Dial up Networking some ISP'S require you to load their script
file for NT. The Script file is provided by your ISP
(Internet Service Provider).

V34 Modems with Rockwell Protocol Interface (RPI)

High speed modems contain an protocols for error correction and data compression. These
are usually the standardised protocols known as V.42, V.42bis and MNP5.

RPI class modems support these protocols through the communication software rather than the modems hardware. In order for the modem to support these protocols the software must be compatible with and be configured for the RPI modem.

Currently, any PM500 modem that is RPI can be identified by the internal jumpers used to
assign COM port and IRQ settings. PM500s that support error correction and data compression through hardware use external switches that, when installed, can be accessible from the back panel of the computer.

Troubleshooting Communication Problems:

1) Make sure there are no screensavers running when sending, receiving, or using the fax
modem.Any kind of screen saver should be disable when troubleshooting ANY MODEM/FAX PROBLEM. These programs are major offenders and cause a lot of FAX/MODEM problems. Anywhere from GPFs to system Lockups.


2) Make sure that no interrupt or address conflicts exist with other devices in the system.
Conflicts give intermittent results that might not appear immediately, but will cause various communication and fax problems sooner or later.

3) If the user is having problems with another communications package, have him try the software that was included with the modem.
FaxWorks support RPI modems when activated in the software's modem setup.
Using the correct software will give the modem error correction and data compression capabilities.

4) If the problem still occurs, make sure the flow control is set properly. Flow control is almost always set to HARDWARE (also known as RTS/CTS.)
Setting the wrong flow control usually causes transfer errors and loss of data.

5) If the user is not able to establish a connection when setting the speed to 115200, reduce the port speed for the modem to 19200.
Line noise will usually cause drops in data transfer rates and disconnection's.

Internal  Dip Switch Settings 28800/33600/56k No-PnP modems

Picture shows modem set to COM 4 IRQ 3, DIP switch settings 2,6,8 ON

The DIP switches are located on the component side of the board, along the edge nearest the gold fingers at the opposite end to the back plate.(the metal bracket that houses the telephone connectors.) SEE EXAMPLE ABOVE (COM 4 IRQ 3 DIP Switches 2,6,8)

All DIP switch settings give the ON switch settings.Switches not mentioned should be set to OFF. E.g. COM1 IRQ4     DIP switches     3,5,7 means set switches 3,5 and 7 ON all other switches OFF.

Holding the modem vertically with the gold fingers nearest the floor; the ON switch position is farthest away from the gold fingers.

PREFERRED SETTINGS:- These settings are the most commonly used.

COM 1    IRQ4    DIP switches    3,5,7

COM 2    IRQ3    DIP switches    2,5,8

COM 3    IRQ4    DIP switches    3,6,7

COM 3    IRQ3    DIP switches    2,6,7

COM 4    IRQ3    DIP switches    2,6,8

IRQs 5 and 9 can also be used but be careful of conflicts.
Any combination of COM ports 1,2,3,4 and IRQs 3,4,5,9 can be selected, use the table below.

    Interrupt settings:                                              COM Port Settings:

IRQ 9 DIP switch 1                                               COM 1 DIP switches 5,7  

IRQ 3 DIP switch 2          ANY COMBINATION      COM 2 DIP switches 5,8

IRQ 4 DIP switch 3           OF THESE SETTINGS   COM 3 DIP switches 6,7

IRQ 5 DIP switch 4                                                COM 4 DIP switches 6,8

Determining free interrupts for modem

The modem requires IRQ 3,4,5 or 9 to function. If none of these interrupts are available they must be freed.

Go to control panel/system/device manager/computer/properties check for unused interrupts. If none available remove unused devices (Highlight device, click Remove) e.g COM 2 , printer port, USB support to free an interrupt.Check with level 3 principal support with devices can be removed. If an interrupt that the modem can use (IRQs 3,4,5,9) can't be freed the modem can't be made to work.

Installing Internal No-PnP 28800/33600/56k modems

This process consists of three stages:-

1. Removing old modems and/or COM ports

2 Installing and configuring COM port

3. Installing modem

Removing old modems and/or COM ports

1.    Go to start/settings/control panel/system/device manager double click on Ports (COM     &LPT). Remove any unused COM ports (Highlight port to be removed, click Remove). Go to     Modems remove any modems present.(Highlight modem to be removed, click Remove)

Installing and configuring COM port

1.    Ensure modem is inserted and located correctly in an ISA slot

2.    Boot-up PC

3.    Go to Control Panel

4.    Select Add new hardware click on Next

5.   Select NO (no search), click on Next

6.    Select Ports (COM & LPT), click on Next

7.    Select (Standard port types) + Communications port, click on Next

8.    Check memory range for new COM port:

                    COM 1     03F8-03FF        Default IRQ     4

                    COM 2     02F8-02FF        Default IRQ     3

                    COM 3    03E8-03EF         Default IRQ     4

                    COM 4    02E8-02EF         Default IRQ     3

If you do not wish to use a default IRQ follow instructions below. The COM port IRQ can not be changed from this screen,

1.    So click Next and Finish, click NO

2.    Select System

3.    Select Device manager

4.    Double click on Ports (COM & LPT)

5.    Select COM port that needs IRQ changed

6.    Click on Properties

7.    Click on Resources8.     Select pull down menu Setting based on: to Basic configuration  5, then highlight the words Interrupt request, click on Change setting and change the value as required. Click OK and OK again.

8.    You will be asked if you wish to shut down, click Yes.

Installing modem

1.    Reboot PC

2.    Select Control Panel

3.    Select Add new hardware, click on Next

4.    Select Modem, click on Next

5.    Don't tick box (let the PC auto-detect your modem), Click on Next.

6.    Click on Change

7.    Click on Have Disk, Insert disk with modem drivers on and point to the directory in which they are contained. Click OK.

8.    Select appropriate driver click OK then Next

9.    Click on Finish

Modem installation is now complete

Installing the PCVC Camera Ready modem

The PCVC modem is based on the Rockwell ACF Plug & Play chipset and features an onboard video capture device. In device manager two devices are listed the modem and the capture device (Quartz capture). The card requires two IRQs (Interrupts).

Before attempting to install this modem ensure that two Interrupts are available.
To establish if two free interrupts are available

Go to control panel/system/device manager/computer/properties check for unused interrupts. If none available remove unused devices e.g COM 2 , printer port, USB support to free an interrupt.Check with level 3 principal support which devices can be removed.

No free interrupts
If two interrupts that the modem can use can't be freed the modem can't be made to work.

This process consists of two stages, firstly removing any old or unused COM ports and/or modems. Then installing and testing the modem.

1.    Boot up the PC into windows

2.    Go to start/settings/control panel, then system, select device manager and double click on ports (COM & LPT) and remove any unused COM ports(Highlight device to be removed and click on Remove). Go to modems and remove all devices.

3.    Go to Windows Explorer/view/options, ensure Show all files is checked, click OK.

4.    Go to windows/inf/other

5.    Delete any modem inf's. (All Modular inf's start "Rockwell......... or RSS). If you are unsure if a inf file is a Modular modem file open it by double clicking the first few lines of the file should look like this:

; mdmrss.inf
; Windows Modem Setup File
; Copyright 1996 Microsoft Corp.
; Version: 1.1
; Manufacturer: Rockwell Semiconductor Systems

If unsure which files to delete check with level 3 principal support.

6.    Shut down PC, ensure modem to be installed is correctly located in an ISA slot.

7.    Restart Windows, which should identify that a new modem has been detected. A window            should be displayed:- New Hardware found, Quartz Video Capture.

8.    This wizard will complete the installation of - Quartz Video Capture will be displayed.          Insert the driver disk or point to the directory in which it is contained. Click Next.

9.    Windows found the following updated driver for this device - Rockwell Quartz Video          Capture will be displayed. If using driver disk leave disk in disk drive and click Finish

10.   Please insert disk labelled "Quartz-sight Video Driver" and then click OK will be               displayed. Leave disk in disk drive and click OK.

11.    The file 'aecacb.dll on Rockwell Quartz couldn't be found'  - will be displayed. Under the  text Copy files from: change the entry in the box to the relevant drive or  directory, click OK windows should now copy the files required.

12.    This wizard will complete the installation of Quartz Video Capture should be displayed,           click next.

13.   Windows found the following driver for this device - Rockwell Compatible Internal              K56Flex, Voice, speakerphone will be displayed, click Finish.

14.    Please insert the disk labelled 'Modem Installation Disk' will be displayed click OK

15.    If windows can't find the wave device drivers select the 'Do not install' option.

16.    Modem is now installed

Fix for RVC Driver Alert
"Time out occurred while waiting for Partial Interrupt Problem"

1. Run C:\Windows\Qrtzcap.exe or Camera on Desktop
2. Press OK when RVC Driver Alert is encountered
3. From Menu select OPTIONS
4. Select VIDEO FORMAT
5. Change Capture Rate to 3.75 fps, select camera
6. Press OK
7. From Menu select OPTIONS
8. Select VIDEO SOURCE
9. Set Picture Brightness to 50
10. Set Picture Contrast to 50
11. Set Picture Colour to 50
12. Select ADVANCED
13. Press DEFAULT (If no DEFAULT box refer Appendix A below)
14. Press OK
15. Press OK
16. Close the QuartzCap application.
17. Run C:\Windows\Qrtzcap.exe
18. Wait for 30+ Seconds until picture appears

Appendix A
Set Advanced Controls to:

Red           -36
Green        -42
Blue          -26
Threshold     3
Intensity       7
Gamma       8
Offset          0