X400: Definition of X.121 Address

ID: Q86977

The information in this article applies to:

Microsoft Mail Gateway to X.400, version 3.0

SUMMARY

The X.121 is an address that enables packets to be sent to people on a public data network. The X.25 network uses X.121 addresses to determine routing within the X.25 network.

The X.121 address can be equated to a voice phone number on a telephone network.

The X.121 address length for an international data number is a 10-digit numeric character set from 0 to 9. The number formats for various data accesses are as follows:

International data number:
P + DNIC + NTN
Or, if the number is part of a national integrated numbering scheme:
P + DCC + National Number
Public telephone network:
P + 9 + TCC + National Significant Telephone Number
Public Telex network
P + 8 + TDC + National Telex Number

Here are descriptions of the acronyms used above:


   Acronym   Description
   -------   -----------

   DCC       Data country code (3 digits)
   DNIC      Data network identification code (4 digits)
   NTN       Network terminal number)
   P         International prefix
   TCC       Telephone country code
   TDC       Telex destination code

For more information, refer to CCITT Recommendation X.121 Fascicle VIII.4.

Additional query words: pcmail

Keywords :
Version : MS-DOS:3.0
Platform : MS-DOS
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