A fully qualified SNA control point name, consisting of a 1 to 8 character network identifier (NetId), a period ('.'), and a 1 to 8 character control point name (CpName).
The NetId and CpName are constructed from the uppercase letters 'A' - 'Z' and the numerics '0' - '9', all encoded in ASCII, with the restriction that the first character of each must be a letter. Trailing blanks are not allowed.
Earlier versions of SNA permitted three additional characters in NetIds and CpNames: '#', '@', and '$'. While this use of these characters has been retired, a Management Station should still accept them for backward compatibility.