I have looked some CC Authorization programs which use. All they connect to
X.28 PAD using standard modem and standard PC and using some
code.
No additional hardware is required!
Why do you think the PAD (you mean the PC card?) is required?
What kind on X.25 programming have you done?

>Although this topic is *way* outside the realm of VFP ;), you'll need a
>PAD (Packet Asm/Dis) on your end as well. If your going to attempt to do the X25 yourself, I can't help you much with that.
>
>>>Most X25 implementations use a 'PAD', a device that maintains the X25
>>>connection and converts the data into/from RS-232. There are also PC boards
>>>which do the same thing. In the X25 implementations I've worked on, this is always how it is done. Once the PAD is in place, you just send/receive data from the MSCOMM control like any other RS-232 connection.
>>
>>Ed, than you for the reply.
>>I know a X.25 PAD phone number. I'm capable to dial to it and
>>send and receive data with it from VFP using MSCOMM.
>>
>>I have also protocol specification for CC Autorization.
>>However, this documentation assumes the knowledge of X.25
>>standard.
>>
>>Is there any information avalibale about this standard ?
>>Are there any utilities (dlls, ocx) which can be called frm VFP ?
>>I have heard about dll for interfacing with X.25 but havent find
>>any such utility?
>>
>>It it possible to implement this protocol in vfp using its
>>bit functions? X.25 seems to be bit oriented so I need to
>>create a bit stream.