General

Before proceeding with the installation verify that you are using the latest available drivers for your adapter.

Review the README.TXT file included with each software release. It contains the most recent information on the capabilities supported by the CreditCard Ethernet 10/100+Modem 56 adapter.

Important Notes

1. Verify with the computer's hardware manufacturer that the computer is using the latest available BIOS version and that your laptop has been certified by Microsoft to be 100% compatible with the Windows NT 4.0 operating system. The definitive source for compatibility information is the Windows NT 4.0 Hardware Compatibility List provided by Microsoft.
2. Microsoft provides periodic software updates (Service Packs) that resolve known issues affecting the functionality of the Windows NT 4.0 operating system and its compatibility with various environments. These updates may be necessary to support this installation. Information concerning available service pack levels and applicability can be obtained from Microsoft.
3. In the event that your laptop was initially shipped with an OEM installation of Windows 95 it may be necessary to disable the Plug and Play option in the system BIOS via the setup (CMOS) utility. It may also be necessary to configure the PCMCIA socket mode to PCIC/16 bit mode if the laptop supports 32 bit Cardbus. Please refer to the documentation provided with your computer for further details about accessing the system setup.
4. Please note that the network and modem portions of the CreditCard Ethernet 10/100+Modem 56 must be installed separately in the Windows NT 4.0 environment. However, once installed the two portions of the adapter will share the configured interrupt.
5. For architectural reasons, some computers will require third party software (SystemSoft*, Award*, Phoenix*, or others) to properly initialize the PCMCIA sockets under Windows NT 4.0. Normally this software is provided by the computer manufacturer and will be pre-installed on the computer along with the operating system. In the event that a copy of Windows NT other than the one provided with the computer is being installed, it may be necessary to contact the manufacturer for further information regarding PCMCIA support for this computer under Windows NT 4.0.

Warning: Persons carrying out the instructions in this document should be familiar with the operation of the Windows NT 4.0 Control Panel and other functions. Utilizing this information in an incorrect manner may adversely affect the operation of the Windows NT 4.0 operating system and your CreditCard Ethernet 10/100+Modem 56 Adapter. If you are unfamiliar or uncomfortable with these instructions seek the assistance of your network administrator or someone familiar with Windows NT 4.0.

Before starting the installation it is important to define the available resources on your laptop. Complete the following check list prior to starting the adapter installation. New computers are shipping with many value added features and devices. However, these features place constraints on the limited resource structure of the PC computer and it may be necessary to disable some of these features to allow for the installation of your Xircom adapter. Using NT Diagnostics (Start, Program, Administrative Tools) select the Resource tab for access to the following information (record these findings for future reference):

Note: The inclusion of a resource parameter in either the IRQ, I/O Port or Memory configuration windows indicates that it is in use. If the resource is not present in either of the above configuration windows then it can be assumed to be available.

Circle available:

-- IRQ:3, 5, 7, 9, 10, 11, 15 I/O

-- Port: 0280, 0300, 0320, 0340, 0360

-- Memory: C8000, CA000, CC000, CF000, D0000, D2000, D4000, D6000

In the Control Panel open the Ports icon and record the listed Ports.

CEM56 Adapter Installation

CEM56 Modem Installation

Installing the Windows NT 4.0 Remote Access Service (RAS)

Troubleshooting the CEM56 Adapter Installation

CEM56 Adapter Removal Procedures

Note: If you have previously attempted to install the CEM56 adapter without success, it is recommended that you proceed to CEM56 Adapter Removal first. The instructions in this section will assist with the complete removal of previous installation attempts leaving the computer in a state of readiness conducive to the successful installation of the CEM56 adapter. When finished proceed to Section 1 to begin the installation.

CEM56 Adapter Installation

This section describes the installation of the Xircom CreditCard Ethernet 10/100+Modem 56 (CEM56) adapter with Windows NT 4.0. This section is divided into two parts. The first deals with CEM56 adapter installation with Windows NT networking already installed and the second part addresses CEM56 adapter installation using the Windows NT 4.0 Network Installation Wizard. The Microsoft Windows NT 4.0 product CDROM and the Xircom Installation Disk (Disk No. 1) are necessary for this installation.

CEM56-100 Adapter installation with Windows NT installed

1. Before starting your system, properly insert the adapter into the lower PCMCIA slot in the computer and connect all cables.
2. Power on your system and allow Windows NT 4.0 to boot normally.
3. At the Control Panel double click the Network icon and select the Adapters tab.
4. Click ADD. This will display a list of adapters that have drivers provided with the NT 4.0 product CDROM and activates the option to use drivers provided by the manufacturer.
5. Click Have Disk and insert the Xircom Installation Disk (Disk 1) into the computer's floppy drive. Click OK.
6. The "Xircom CreditCard 10/100+Modem 56" listing is displayed in the Select OEM Option box. Click OK to bring up the Network Configuration window.
7. The Network Configuration window displays the resources assigned to the Xircom CreditCard Ethernet 10/100+Modem 56. Adjust these settings to reflect available resources (recorded at the beginning of this document) and click OK. The Network Adapters window should now appear with the adapter listed.
   
   Note: The following resource settings work with many laptop models. To verify resource availability use the NT Diagnostics utility contained in the Administrative Tools group.
   
   -- Network Settings:Parameter ValueI/O
   -- Port: 0x280 Memory Address: 0xD4000 Interrupt: 10 or 11 Early Transmit Off: (no check in box) Modem I/O: 02E8 Function
   -- Enable: Network & Modem (default) All other settings at default
   
   Note: The Power-Saving Option (FunctionEnable) can be configured to disable either the Network or Modem function when both are not required. Use of the default setting (Network and Modem) is recommended until both functions have been successfully installed.
   
   
8. Select the Services tab. If any additional services are required choose the Add option and select them from the provided list of services. By default Windows NT installs basic network services that support only Microsoft networking. Client services for other Network Operating Systems (such as Novell*) and Remote Access Services (RAS) need to be added manually if desired. Questions concerning required services for your particular network should be addressed by your local network administration personnel.
9. Select the Protocols tab. Verify that the necessary protocols are present. Use the Add function to view and select protocol options. Your network administrator can define these requirements and any configuration data necessary for their installation.
10. When satisfied that the proper services and protocols are present and configured click Close.
    
    Note: At this point Windows NT will bind the active protocols to the CEM56 adapter. If necessary, Windows NT prompts the user for protocol configuration information (IP addresses, for example). Your network administrator can provide this data. If prompted, add this information and click Close again.
    
11. Windows NT will prompt to restart the computer in order for all changes to take effect. Click Yes. The computer will restart and initialize the Xircom CreditCard Ethernet 10/100+Modem 56 adapter.
12. If the CEM56 is not correctly initialized or an error condition occurs which prevents access to the network, proceed to Troubleshooting the CEM56 Adapter Installation.

CEM56-100 Installation Using Windows NT Installation Wizard

1. Before starting the computer, properly insert the adapter into the lower PCMCIA slot and connect all cables.
2. Power on the system and allow Windows NT 4.0 to boot normally.
3. From the Control Panel, double click the Network icon. A Windows NT message box should appear indicating that "Networking is not installed...". Click Yes to start the Network Installation Wizard. Accept the default setting "Wired to the network" and click Next.
   
   Note: Selecting the option "Remote access to the network" installs the RAS (Dial-Up Networking) service which requires installing the modem. Refer to Section 3 Installing Windows NT 4.0 Remote Access Server for more information on RAS setup. It is recommended that you install the RAS service after Networking has been installed successfully.
   
4. Click the "Select from list..." button. Then click the "Have Disk..." button.
5. Place the Installation Disk (Disk 1) in the floppy drive. "A:" should appear in the Insert Disk dialog box. Click OK.
   
   Note:E: If the message "OEMSETNT.INF or OEMSETUP.INF cannot be found" appears, verify that there is a disk in the floppy drive and it is the CEM56 Installation disk (Disk 1).
   
6. In the Select OEM Option box "Xircom CreditCard 10/100+Modem 56" should be selected, click OK. The Network Adapters window should display "Xircom CreditCard 10/100+Modem 56" with a check mark next to it indicating that this is the active network adapter, click Next.
7. The Network Protocols window will appear with the default (TCP/IP) protocol selected. Select the protocols necessary to support your network environment and click Next to bring up the Network Services window. Check with your network administrator if uncertain about which network protocols to install.
8. In the Network Services window the default services installed by Windows NT will be listed. Click Select from list... to add additional services, such as Client Service for NetWare* (check with your network administrator for list of required services). Click Next when all services have been added. Click Next again to allow Windows NT to install the selected components. You will first be prompted to enter the path to the Windows NT product CDROM. Windows NT will then prompt for the CEM56 Installation disk (Disk1).
9. When all necessary files have been copied to the local drive, the Network Settings window should appear displaying the resources assigned to the adapter by Windows NT. Issues concerning the reporting and assignment of available resources exist in this applet. The resources defined here can be validated using the NT Diagnostic utility contained in the Administrative Tools group. To view assigned resources select the Resources tab in this applet or refer to the information noted at beginning of this document.
   
   Note: The following resources are known to work with many laptop computers:
   Network Settings: Parameter Setting I/O Port: 0x280 Memory Address: 0xD4000 Interrupt: 10 or 11 Early Transmit Off: (no check in box) Modem I/O: 02E8 FunctionEnable: Network & Modem (default)
   
   Note: The Power-Saving Option (FunctionEnable) can be configured to disable either the Network or Modem function when both are not required. The default setting, Network and Modem, is recommended until both functions have been successfully installed.
   
10. Click continue when you are satisfied with the assigned resources. Windows NT will begin the software installation. Once the software is installed you will be given the option to review all services, protocols and adapters. You may enable or disable bindings for each. If you are satisfied with all selections click Next, and then click Next again.
11. The Identification dialog box should appear. Enter a unique computer name and select either Workgroup or Domain (your network administrator can help with this selection - please note that entries here are case sensitive). Click Next, click Finish, then select Yes to restart your system.

Unlike other operating systems (DOS and Windows 95) the CEM56 modem must be set up separately under Windows NT 4.0. The modem .INF file used in the installation of this modem is contained on the Installation Disk (Disk 1) in the NT40 directory (A:\NT40\MDMCEM56.INF).

Warning: By default Windows NT displays the path A: as the location to search for files. This MUST be changed to A:\NT40 or the wrong INF file will be used and will cause the installation to fail. The following steps will with the installation of the CEM56 modem. Ensure that the CEM56 adapter is present in the computer prior to starting Windows NT.

Note: On boot, with the CEM56 present, Windows NT will automatically install all BIOS assigned COM ports and one additional COM port for the CEM56. COM ports are assigned to devices such as serial ports, internal modems and serial Infrared (IR) devices.

1. Double click the Modem icon in the Control Panel. If there are no existing modems installed the Install New Modem wizard will appear. If there is an existing modem installed choose the add option. DO NOT place a check mark in the box "Don't detect my modem ; I will select it from a list". ChooseNext. NT will then query all existing ports searching for the modem. Once detected, the COM port and the type of modem found are displayed. If Windows NT fails to successfully detect a modem proceed to Troubleshooting the CEM56 Adapter Installation and to the subsection on troubleshooting the modem installation. In the event that a Standard Modem is detected, choose Change. Click the Have Disk button and type A:\NT40 in the dialog box, then click OK. This displays the Install New Modem Models dialog box with Modem of Xircom CreditCard 100+56 selected, click OK. Choose Next after returning to the previous screen if the selected modem type is correct.
2. On completion of the Modem installation wizard the Country Select software scans the available COM ports for a Xircom modem. It should detect the installed modem and move directly into the Country Select software window which displays the default country "United States". Click Exit if this selection is appropriate, or select the desired country and click Save, then Exit. NOTE: If the Country Select software does not find a Xircom modem proceed to Troubleshooting the CEM56 Adapter Installation and refer to the subsection on troubleshooting the modem installation.
3. The Registration program activates as soon as the Country Select software closes. Click Next to complete the registration or Cancel to quit. This information can be completed at anytime by executing REG3.EXE from the \XIRCOM\XAPPS directory.
4. The modem properties window should appear with the Modem of Xircom CreditCard 100+56 prominently displayed. You may modify the adapter properties and dialing properties as fits your needs.

Note: Refer to "Troubleshooting the CEM56 Adapter Installation", under troubleshooting the modem installation should any issues arise with this installation.

In order to utilize Windows NT 4.0 Dial-Up Networking, the Remote Access Service (RAS) must be installed. This section contains instructions necessary to successfully install and configure RAS for use with the CreditCard Ethernet 10/100+Modem 56 (CEM56) modem.

Preliminary notes:

• If continual difficulties are encountered after following these instructions it is recommended that you obtain and apply the latest Windows NT 4.0 Service Pack. Refer to the Important Notes at the beginning of this document for more information regarding Windows NT Service Packs.
• Verify that the CEM56 modem has been successfully installed before performing the RAS installation. If the modem has not yet been installed, refer to CEM56 Modem Installation.

1. In the Control Panel double click the Network icon and select the Services tab. Click Add to display the Select Network Service dialog box. Scroll to and select Remote Access Service, then click OK. Windows NT will prompt for the Windows NT product CDROM. Enter the appropriate path and click Continue. Windows NT will begin copying the necessary files (this may take a few minutes).
2. The Add RAS Device dialog box should appear. View the field indicating RAS capable devices. Confirm that the Modem of Xircom... is currently selected. If multiple RAS capable devices are installed it may be necessary to select the Modem of Xircom... entry from the list. When the Modem of Xircom... entry is selected click OK.
3. The Remote Access Setup dialog box should be displayed. Verify that the Modem of Xircom... entry is selected. Click Configure. Under Port Usage, select the preferred option (the Dial Out Only option is recommended unless you intend to use the modem to receive calls) and click OK.
4. Click Network and select the protocols you intend to use for Dial-Up connections by choosing the appropriate boxes. Generally, TCP/IP is required if you plan to connect to an internet service provider. If you are connecting to servers at a remote corporate site, other protocols may be required. Consult your network administrator or internet service provider if you are uncertain about which protocols to use for your remote connections. Once the appropriate selection has been made, click OK.
5. Click Continue. Window NT will complete the installation of the Remote Access Service and the necessary bindings. When this process is completed the Remote Access Service should be displayed in the Network Services list. Click Close.
6. Windows NT will complete the binding process and then prompt you to restart your computer. Click Yes.
7. Windows NT will restart. When fully booted go to Start, Programs, Accessories, Dial-Up Networking. If no phonebook entries have previously been defined, this action will start the New Phonebook Entry Wizard. (Prior to starting the Wizard, a Dial-Up Networking information box may be displayed indicating that the phone book is empty. If this appears click OK and the Wizard will start.)
8. Choose and enter a name for the phone book entry you wish to use (initially the default name My DialUp Server will be displayed), and click Next.
9. A Server dialog box will be displayed with various connection options listed. The options chosen will depend of the type of connection you are making. If you are uncertain about these choices consult your network administrator or internet service provider. Click Next.
10. A Phone Number window will be displayed. Enter the appropriate phone number. Leave the "Use Telephony Dialing Properties" box unchecked at this time. Click Next.
11. Click Finish. Windows NT will store the information and then display a Dial-Up Networking dialog box that contains information about your connection. You can dial at this time by clicking Dial, or modify properties of the connection by clicking the other option buttons. Other connection setups can also be defined by clicking New and performing steps 7 through 10.

This section will assist with troubleshooting the most common issues that prevent the Xircom CreditCard Ethernet Adapter 10/100+Modem 56 Adapter (CEM56) from installing and functioning correctly. The section is split into two parts:

- Troubleshooting the CEM56 Network Installation

- Troubleshooting the CEM56 Modem Installation

(A Problem, Cause, Resolution format is used in the following descriptions).

Problem:

System lockup during initial shutdown and boot

- Other hardware devices function sporadically
- Computer locks up randomly
- Slow Network Performance

Random system lock ups, system lock ups at either shutdown or startup, or slow network performance can usually be attributed to a resource conflict. It may also be the result of an incompatible version of PCMCIA.SYS, the PCMCIA socket driver. It may be necessary to update to a later version of the PCMCIA.SYS. This can be done by applying the latest Microsoft Service Pack.

Note:: Service Packs are the Microsoft vehicle used to integrate software upgrades to the Windows NT operating system. Refer to the Important Notes at the beginning of this document for information on obtaining these upgrades.

Shutdown the computer and remove the adapter. Restart the computer and allow Windows NT to boot normally. Click OK at the message box indicating that a Service or Device failed to start (the error is a result of the adapter being out of the computer). The following steps will assist the evaluation and modification of CEM56 assigned resources and feature settings:

1. Start Windows NT Diagnostics (Start, Programs, Administrative Tools).
2. Under the Version tab note the Service Pack level. The version of Windows NT is displayed as follows:

   Microsoft* Windows NT* Workstation Version 4.0 (Build 1381: Service Pack x)

   Note: If no service packs have been applied, Version 4.0 (Build 1381:) is displayed. The designation x is equal to the service pack level. Normally it would display a number 1 through 4.
   

3. Select the Resources tab. By default the IRQ levels in use are displayed.Verify that the IRQ assigned to the CEM56 adapter is not in use by any other device. This list is not inclusive and may not be completely indicative of resources in use. (Microsoft support may be able to amplify on this point).
4. Select I/O Port and verify that the I/O Port Address assigned to the CEM56 adapter is not shared by any other device. It is our experience that I/O Port 0x280 is almost always available. This is displayed as:

   0280 - 028E CEM56 Bus 0 Type ISA

   Note: For an I/O Port Address to be useable the entire I/O range must be available. For example, the above listed I/O range would be unusable if another device was using any I/O port within that range.

5. Choose Memory. The CEM56 requires one 8K block of memory and one 4K memory block. With 0xD4000 selected under Network adapter properties the memory segments are:
   
   000D4000-000D5FFF CEM56 Bus 0 Type Isa 000D6000-000D6FFF CEM56 Bus 0 Type Isa

   Any device attempting to use the same memory segments will cause the adapter to fail initialization. Ideally we are looking for 12K of contiguous memory starting with the first 4K block following the Video drivers. Typically video drivers load in the C000-C7FFF range. This varies from computer to computer. The memory range identified in the CEM56 User's Guide is any block in the C0000-E7FFF range. Be aware that not all blocks of memory are available.

6. Open the Network applet and select the Adapter tab. With the Xircom CreditCard 10/100+Modem 56 selected, click Properties. Set the adapter resources to those that have been identified as available through the previous steps. We have found the following resources too work with most systems:

   I/O Port 0x280 Memory Address 0xD4000 Interrupt 10
   
   

7. It is recommended that the Line Speed be forced to the value used by your network while troubleshooting. The default setting is Auto and the options are 10 or 100.
8. Remove the check from the Early Transmit box. This changes the buffering aspect of the network pipe reducing the chances of corrupting the network datastream. Corrupted packets will prevent connecting to the network.
9. Under Power-Saving Options Network & Modem should be displayed.
10. Click OK, then Close. After the network bindings have been updated select Yes to restart the computer. Insert the adapter and allow Windows NT to boot normally.

Problem

After installing the CEM56 adapter and rebooting Windows NT, I received a Service Control message reporting that a service or driver did not start.

Possible Solutions

You can use the Event Viewer to read the error messages. Open the Event Viewer (START, Programs, Administrative Tools, Event Viewer). The Event Viewer will list any errors the system encountered during the boot process. (The errors are read from bottom to top. Double click the bottom error message to start reviewing.)

Note: Error messages reporting that the driver failed to start because a device attached to the system is not functioning may be caused by different situations. This error is sometimes displayed if you have previously installed another adapter even when that adapter is not currently connected to the computer, but remains an installed component.

The error may also be displayed if two different devices are attempting to use the same resources. The solution is to adjust the listed adapter's configuration settings under the Network applet Adapter Properties .

First verify the resources presently being used by the CEM56:

1. From the Control Panel double click the Networking icon and select the adapter tab.
2. With the Xircom CreditCard Ethernet 10/100+Modem 56 entry selected click the Properties button to bring up the CEM56 Properties page. Record the values displayed for Interrupt, I/O Port Address and Memory.

3. Now open the NT Diagnostics program (Start, Programs, Administrative Tools, Windows NT Diagnostics). Select the 'Resources' tab and one-by-one review the IRQ, I/O PORT, DMA, MEMORY, and DEVICES lists for any value that conflicts with the values recorded in the preceding step.

   Common items that will often conflict with the CEM56 resources are:

   Sound Card - Often uses IRQ 5 and I/O Port addresses 220h and 330h

   PCMCIA.SYS - Will normally install in the memory segment D000-D3FF and may or may not be identified under NT Diagnostics.

   After choosing settings that are not being used, modify the adapter resource values by performing these steps:

   • Open the Network applet in the Control Panel and select the Adapter tab.
   • Select the adapter entry Xircom CreditCard 10/100+Modem 56 and click Properties .
   • Change the resource settings to those previously identified as available. We have found through a number of installations that the following resources work well with most machines:

     Interrupt 10 or 11 I/O Port Address 280h Memory D4000

     It is also recommended that the Line Speed be forced to the speed being used with your network.

   • Click OK in the adapter configuration window and then click Close in the Network window.
   • Windows NT will prompt to restart. Click Yes.

I installed the adapter and can see all other Microsoft computers on the network, but cannot see the Novell* NetWare* Server.

Possible Solution:

Windows NT does not install the Novell* NetWare* client automatically. Verify that the NWLink IPX/SPX Compatible Transport is installed and install the Client Service for NetWare service by performing the following steps.

1. Open the Control Panel and double click the Network icon.
2. Choose the Protocols tab and verify that NWLink IPX/SPX Compatible  Transport is loaded. If it is present, go to step 3. If it is not present, install the protocol by clicking Add and selecting NWLink IPX/SPX Compatible Transport, click OK. Windows NT will prompt for the Windows NT 4.0 CDROM. Point to the CDROM as requested and click OK. This will install the protocol. The protocol will not be active until the system is restarted.
3. In the Network window select the Services tab. If the Client Service for NetWare is not installed click Add, select Client Service for NetWare and click OK. Windows NT will prompt for the Windows NT 4.0 product CDROM. Point to the CDROM as requested by clicking OK. This will install the NetWare client services. Windows NT must be restarted to for this service to be active.
4. Once you reboot and log into Windows NT you should see the NetWare logon window. If you are using a Novell 3.x server click the Preferred Server button. Enter the name of the server and click OK. If you are using a Novell 4.x server, select the Default Tree and Context option. Type in the tree and context names and click OK.

Note: If your Windows and Novell passwords are different you will be presented with a password dialog box and will need to enter the correct password to logon to the Novell server.

Troubleshooting the CEM56 Modem Installation

The following information can be used to resolve various issues that may render the CEM56 modem unusable.

In most cases, difficulties with modem operation can be traced to interrupt, Modem I/O address or communications port conflicts with other devices. Modem difficulties may also be caused by a change to the Windows NT COM port and Serial drivers or physical damage to the CEM56 adapter. The following discussion provides a few commonly seen scenarios and their possible resolutions.

Problem

Windows NT fails to detect a Xircom modem during installation.Windows NT does not recognize the modem or the Xircom Country Select software fails to detect a Xircom modem.

Possible Causes

This error condition can be caused by the lack of an available COM Port, by a resource conflict with another device, or by using the wrong MDMCEM56.INF file during the installation.

Possible Resolution

1. Verify that the adapter is firmly seated in the PC card socket. If network connectivity is available then we can be certain of this point.

2. Under Ports in the Control Panel verify that an additional COM port has been added for the modem. To determine this, go to Control Panel, Ports. Highlight and remove all ports. Shutdown the system, remove the CEM56 adapter and restart the system.

Go to Control Panel, Ports. Make note of the installed COM ports. Shutdown the system, reinsert the CEM56 adapter and restart the system. Go to Control Panel, Ports. Verify that an additional COM port has been added as a result of re-inserting the CEM56 adapter.

If it has been verified that an additional COM port has been added please try the following:

a. Go to Control Panel, Network, Adapter, Properties and modify the I/O Port address in the 'Modem Settings' box. Verify the modem I/O address selected is not in use through the Diagnostics applet as described in the Networking installation section.

b. Go to Control Panel, Ports. Highlight and double click on the COM port that is being assigned to the Xircom Modem. Choose the Advanced tab. Modify the 'Base I/O Port Address' setting to an address that is currently not in use to include the Xircom Modem.

Modify the 'Interrupt Request Line (IRQ)' setting to the same setting that the Xircom adapter has been configured to in the Control Panel, Network, Adapters, Properties box. This is sometimes necessary; due to the shared interrupt.

If no additional COM port has been installed please try the following:

1. By following the steps from the section on Troubleshooting Network Connectivity, try modifying the interrupt and/or memory address for the adapter until no conflicts are registering.
2. if your computer is equipped with an infrared communications port you may need to disable this port for proper functionality of the modem. Infrared Communications Ports often use COM port resources required for other communications devices. Most infrared ports may be disabled from within the computer's CMOS or BIOS setup program. On some computers a hardware setup utility is used. Please refer to your computer's documentation for complete information on disabling any Infrared Communications Ports.
3. Although unlikely, it is possible that the computer may not have an available COM port for the modem to use. You may need to disable a COM port device in order free that port for the modem. Please contact the computer hardware manufacturer for information on the possible consequences that may arise from removing or disabling any COM ports prior to effecting this change.
4. It may be necessary to update the NT communication driver (SERIAL.SYS). This can done by applying a Microsoft Service Pack. Please see the Notes and Network troubleshooting sections for further details regarding Microsoft Service Packs.
5. Go to Control Panel, Devices. Scroll down to 'Modem' in the device list. Choose the startup tab. Change the Startup Type to Automatic. Restart the Computer.
6. For connection difficulties to specific sites such as your Internet Service Provider, or company remote access locations, please verify with the support personnel at the respective locations that your client software and dial-in communications software are configured properly.

Problem

Connection establishment or data transfer problems are encountered when using Microsoft Dial-Up Networking.

Possible Cause

A modem connection is not established, or the connection is established but login authentication problems are encountered.

Possible Resolution;

Xircom recommends that you verify that you have the latest version of firmware installed on your adapter before investigating other possible causes for connection problems. The latest version of firmware can be obtained from the Xircom forums list at the beginning of this document. Contact information for these sites is included at both the beginning and the end of this document.

When the modem initially establishes a connection, it attempts to negotiate the best connection possible with the answering modem. The specifics of this will vary depending on the type of answering modem and the telephone line conditions that prevail at this location. If difficulties in establishing a connection are encountered, the following suggestions can be tried:

Note: A number of the suggestions here involve invoking one or more modem  command string parameters. These can be specified via the "AT" command in a terminal emulator application (such as the Windows NT Hyperterminal program) or the Xircom Modem Test that is placed in the Xircom Program Group during the adapter installation, or they can be invoked globally by configuring them in the "Extra Settings" field in the modem properties window (Control Panel, Modem, select the CEM56 entry and click Properties, Advanced, Extra Settings).  Note that the "AT" prefix should NOT be included if they are specified in the  "Extra Settings" field. Also note that these command suggestions are not exhaustive. A complete listing of available modem command string parameters  and their functional descriptions is included in the online help documentation  supplied with your CEM56 adapter.

1. If a connection cannot be established at all:
2. Try connecting at a lower speed. The following commands apply:
3. +MS=V34 Attempts to make a v.34 connection +MS=V32B Attempts to make a v.32bis connection +MS=V32 Attempts to make a v.32 connection --S37=19 Attempts to connect at 33600 Kbps S37=17 Attempts to connect at 28000 Kbps S37=13 Attempts to connect at 19200 Kbps S37= 11Attempts to connect at 14400 Kbps (Other S37values are listed in the online documentation)
4. Try disabling or modifying the error correction protocol or data compression protocols used. The following commands apply: \N0 Normal mode - no error correction or compression \N5 MNP 2-4 error correction %C0 MNP 5 data compression
5. Other miscellaneous command string parameters that may help:
6. ATI3 Displays the current firmware revision of the CEM56 ATI11 Displays the call statistics for the last call made %E0 Disables auto-retrain
7. In some cases phone line conditions may be so poor that a connection cannot be established. Try connecting from different locations.
8. If connections are successfully established but difficulties in login authentication are encountered, the following can be checked:
9. Ensure your protocol settings are correct. Verify whether the Dial-Up connection desired is to be made using NetBEUI, IPX/SPX (Novell), or TCP/IP, and make sure that the necessary protocol(s) are bound  properly. Go to Control Panel, Network, Bindings. In the "Show Bindings for" field select "All adapters" from the drop-down list. There should be one or more Remote Access WAN Wrapper entries listed, each of which will be bound to a different protocol. Double click each of these entries in turn to view the bindings, and verify that each protocol you wish to use for dial-up purposes is represented. The binding relationships can be viewed from a different perspective by selecting "All protocols" from the drop-down list and then double clicking each protocol in turn to see if it is bound to a Remote Access WAN Wrapper device.
   
   Note:if viewed by protocol some secondary protocol references, such as NWLink NetBIOS, will not indicate a binding to an adapter. This is normal. The primary transport protocols, such as NetBEUI, NWLink IPX/SPX Compatible Transport, and TCP/IP are the protocols that are of significance here.
   
10. Also verify that the proper protocols are enabled on the Dial-Up Networking connection associated with the number you are dialing. When you install Dial-Up Networking and create a new connection, you are prompted to define the properties for the connection. Once the connection is defined, go to Start, Accessories, Dial-Up Networking. Verify that your connection name is selected as the current phone book entry, or select it from the drop-down list. Click More. Select Edit entry and modem properties... and then click Server . Verify the correct protocols are selected.
11. If you are connecting to an ISP, you will almost certainly be using TCP/IP to do so, and you will need to configure your TCP/IP settings. On the Server tab click TCP/IP settings. Most connections should use Server Assigned IP address and DNS entries, but you might need to define these as static entries. If so, be sure they are correct. Consult your Internet Service Provider or network administrator if you require further assistance in configuring TCP/IP for Dial-Up connections.
12. For some connections you may find it necessary to invoke a terminal window in order to manually perform the login. If this is the case, click the Script tab. Select the Pop up a terminal window option and then click OK
13. If the modem normally connects but appears to be unable to negotiate a 56K connection, other factors may be involved. In order to achieve 56Kbps connects, there can be only one digital to analog conversion between the connecting modems. Also, the modems at both ends of the call must be K56Flex compatible to achieve 56K speeds, if not, they will negotiate a standard V.34 rate. Current FCC regulations limit download speeds of the modem to 53Kbps. Failure to make PCM (Pulse Code Modulation) 56K connections could be due to any of the following items:
    
    - Incompatible 56K modem types (i.e., K56flex vs X2)
    - Poor line quality
    - Excessive distance in the analog portion of the connecting line
    - More than one digital-to-analog conversion in the connection path
    - The ITU has released the V.90 standard, which incorporates aspects of both K56flex and non-K56Flex PCM schemes into a standard that will allow interoperability of all 56K capable modems.

CEM56 Adapter Removal

This section is designed to assist with the complete removal of the CEM56 adapter, its associated files and subsequent registry entries caused by the installation. Successful completion of these steps returns the Windows NT operating system to a state conducive to the proper installation of the Xircom adapter. After completing these steps return to CEM56 Adapter Installation for assistance with installing the Xircom adapter.

1. Select Network from Control Panel. Choose the "Adapters" tab, Select "Xircom CreditCard Ethernet 10/100 ..." Click Remove
2. Select the Services tab, choose Workstation and click Remove. Select each service in turn and remove it in the same manner.
3. Select Protocol tab. Choose a Protocol and click Remove until all protocols are removed. Click Close then No to restart the computer.
4. Select Modems from Control Panel. Select "Xircom CreditCard Ethernet 10/100 ..." Click "Remove"
5. Select Ports from the Control Panel. Choose each port in turn and delete it.
6. Delete \(winpath)\SYSTEM32\DRIVERS\CEM56.SYS Delete \(winpath)\SYSTEM32\CEM56.DLL. Delete \(winpath)\SYSTEM32\OEMNADx.INF (only files pertaining to the Xircom CEM56 adapter and x is a number 0 to n). Delete \(winpath)\INF\\MDMCEM56.INF, MDMCEM56.PNF. Delete \(winpath)\INF\OEM*.INF, OEM*.PNF (only files pertaining to the Xircom CEM56 adapter) Delete \Xircom
   
   Note: Use the Windows Explorer* search function (Tools, Find, File or Folder) to easily locate the files listed in step 3. When searching for the OEM files pertaining to your Xircom adapter use the advanced function of this tool by selecting the "Advance" tab and typing CEM56 (for example) in the "Containing text" dialog box.
   
   Warning: Should the \(winpath)\INF\OEM*.INF (* represents a numeral as in OEM1.INF) file appear in the Files found box it will be necessary to manually delete the associated OEM*.PNF file from the INF directory. This file does not appear in the Files found box because the CEM56 is listed in the Advanced tab of the search box. While this file does pertain to the CEM56, it is a generated file and does not specifically include the nomenclature CEM56.
7. Open the Registry Editor (Start, Run, type REGEDT32, click OK). Select the HKEY_LOCAL_MACHINE on Local Machine page. Note: The Registry Editor can be accessed in two ways; one by typing REGEDIT in the Run box; the other by typing REGEDT32 in the Run box. We use the REGEDT32 command because we are only interested in the entries located on HKEY_LOCAL_MACHINE on Local Machine page of the Registry. Using the REGEDIT command brings up all five pages of the Registry into one display making it more time consuming to identify and delete the necessary keys.
   
8. Delete the following keys (HKLM stands for HKEY_LOCAL_MACHINE):
   
   -- HKLM\HARDWARE\RESOURCEMAP\OtherDrivers\CEM56
   -- HKLM\SOFTWARE\Xircom
   -- HKLM\SYSTEM\ControlSet001\Services\CEM56\CEM561 (the 1 may be any number 1 to n)
   -- \EventLog\SystemCEM56
   -- HKLM\SYSTEM\ControlSet00x\Services\CEM56\CEM561 (the 1 may be any number 1 to n)
   -- \EventLog\System\CEM56
   
9. Close the Registry and restart the computer.

This applies to:

XircomŪ CreditCard Ethernet 10/100+Modem 56 GlobalACCESS Adapter (CEM56-100) XircomŪ RealPort™ Ethernet 10/100+Modem 56 GlobalACCESS Adapter (REM56G-100)