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- OLITEC USB ISDN 128K<br />

- Multitech MTA128ST-RC ML-PPP (see note below)<br />

- Eicon Diva 852 ISDN T/A USB - ISDN BRI ST - 128 Kbits/s<br />

ISDN 64 to 128 KPBS modems handling the PPP protocol are generally compatible and<br />

support CHAP authentication.<br />

Note:<br />

When using the Multitech modem, the authentication method must be set to CHAP. This is the default<br />

method for current firmware versions. For modems with older firmware, you must either update the<br />

firmware or activate CHAP with the AT command AT S58=3.<br />

RAS Installation Process<br />

In Windows 7/XP/Vista, you do not need to install new operating system components before<br />

configuring a new access method; the Remote Access Services (RAS) component is installed<br />

by default on these systems.<br />

The sub-sections below describe how to set up the following remote access methods:<br />

- Direct V24 Connection (OmniPCX Office Direct V24)<br />

- Remote connection via ISDN modem (an example is provided for driver installation)<br />

V24 Driver Installation Procedure<br />

1. Open the Control panel.<br />

2. Select Phone and Modem Options.<br />

3. Select the Modems tab.<br />

4. Click Add.<br />

5. Check Don't detect my modem; I will select it from the list.<br />

6. Follow the Wizard instructions to install the modem. You will need to choose the COM port<br />

that will be associated with the modem.<br />

7. You may need to reboot the PC to complete the installation.<br />

Installing the Driver for an ISDN Modem (example)<br />

The following procedure describes how to install a FRITZ modem.<br />

1. Insert the modem installation CD-ROM.<br />

2. Click the FRITZ ¡X PC Capi driver installer icon The wizard is displayed.<br />

a. Indicate the serial port where the modem will be connected.<br />

b. When the install process is complete, reboot the PC.<br />

3. Insert the modem installation CD-ROM. The wizard is displayed<br />

a. Click the FRITZ ¡32 Communication Software installer icon.<br />

b. Select Install and configure.<br />

c. Use the default installation (click on Next in each Wizard screen).<br />

d. At the end of the Wizard mode, check the Install Capi-port driver box.<br />

4. Select AVM ISDN1 Internet (PPP over ISDN).<br />

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