OSI/TS Configuration and Management Manual

Background Information About Addressing
OSI/TS Configuration and Management Manual—424831-001
2-10
DSP Component
Returning to the AFI example, an AFI value of 39 indicates that the addressing authority
is ISO DCC. The ISO DCC entry in Table 2-2 indicates that the IDI is exactly three
digits long and specifies the data country code.
DSP Component
The DSP (domain-specific part) values are determined by the addressing authority
identified in the IDI field (shown in Table 2-1
); the syntax format is determined by the
AFI value. There are four types of DSP syntax, as follows:
The maximum length of the DSP is shown in Table 2-3.
Table 2-2. IDI Values
If the IDP Format (Authority) Is ... The IDI Length is ... And the Meaning is ...
X.121 (CCITT X.121) 14 digits maximum X.121 number
ISO DCC (ISO 3166) 3 digits Data country code
F.69 (CCITT F.69) 8 digits maximum Telex number
E.163 (CCITT E.163) 12 digits maximum Public switched
telephone network
E.164 (CCITT E.164) 15 digits maximum ISDN number
ISO ICD (ISO 6523) 4 digits International code
designator
Local null (not applicable)
Binary octets A string of eight-bit binary numbers, up to the maximum
specified in Table 2-3
Decimal digits Zero or more decimal digits, up to the maximum specified in
Table 2-3
Characters One or more ISO 646 characters with no national variant, plus
the space character, up to the maximum specified in Table 2-3
(This type can only be used with local AFIs.)
National
characters
One or more characters from the national character set
determined by the network addressing authority, up to the
maximum specified in Table 2-3
(This type can only be used
with local AFIs.)