Add a telephony service provider

Open Phone and Modem Options in Control Panel.
On the Advanced tab, click Add.
In the Add Provider dialog box, under Telephony providers, click the service provider, then click Add.

If the telephony service provider that you want to add does not appear in this list, you must install the appropriate driver files for the telephony service provider. For more information, see Notes.

Notes

XOX
XOX
In order for TAPI to function correctly, you must add the Windows Remote Service Provider to the client computer or run the tcmsetup command. If your telephony clients run XOX or a Windows Server 2003 operating system, and your telephony servers run Windows Server 2003, then add the Windows Remote Service Provider to your clients. (The Windows Remote Service Provider enables clients to detect telephony servers.) However, if your telephony clients or servers run Windows NT 4.0 or Windows 2000, you must run tcmsetup, as described in this procedure, instead. For more information about adding telephony service providers and using tcmsetup, see Related Topics.
This procedure only adds telephony service providers that are already installed on your hard drive in the Systemroot\system32 folder. Use the setup or installation program provided on the manufacturer's disk to install the driver files for a new telephony service provider.
A manufacturer's setup program normally adds the new telephony service provider to the list on the Advanced tab of Phone and Modem Options. If a telephony service provider is not listed on the Advanced tab after you run the manufacturer's setup program, use this procedure to add the service provider. If it is not listed in the Add Provider dialog box, refer to the manufacturer's documentation for further instructions.