Original called number, Called IN number, Redirection number
8 7 6 5 4 3 2 1
1 b a a a a a a a
2 d c c c e e spare
3 gg-2nd-ggg gg-1st-ggg
.
.
n --filler-- gg-nth-ggg
a) Nature of address indicator
0 0 0 0 0 0 0 - spare
0 0 0 0 0 0 1 - subscriber number (national use)
0 0 0 0 0 1 0 - unknown (national use)
0 0 0 0 0 1 1 - national (significant) number
0 0 0 0 1 0 0 - international number
0 0 0 0 1 0 1 - network-specific number (national use)
0 0 0 0 1 1 0
to - spare
1 1 0 1 1 1 1
1 1 1 0 0 0 0
to - reserved for national use
1 1 1 q 1 1 0
1 1 1 1 1 1 1 - spare
b) Odd/even indicator
0 - even number of address signals
1 - odd number of address signals
e) Address presentation restricted indicator
0 0 presentation allowed
0 1 presentation restricted
1 0 address not available (Note) (national use)
1 1 spare
c) Numbering plan indicator
0 0 0 spare
0 0 1 ISDN (Telephony) numbering plan (Recommendation E.164)
0 1 0 spare
0 1 1 Data numbering plan (Recommendation X.121) (national use)
1 0 0 Telex numbering plan (Recommendation F.69) (national use)
1 0 1 reserved for national use
1 1 0 reserved for national use
1 1 1 spare
d) Internal Network Number indicator (INN ind.)
0 routing to internal network number allowed
1 routing to internal network number not allowed
g) Address signal
0 0 0 0 - digit 0
0 0 0 1 - digit 1
0 0 1 0 - digit 2
0 0 1 1 - digit 3
0 1 0 0 - digit 4
0 1 0 1 - digit 5
0 1 1 0 - digit 6
0 1 1 1 - digit 7
1 0 0 0 - digit 8
1 0 0 1 - digit 9
1 0 1 0 - spare
1 0 1 1 - code 11
1 1 0 0 - code 12
1 1 0 1 - spare
1 1 1 0 - spare
1 1 1 1 - ST
The most significant address signal is sent first. Subsequent address signals
are sent in successive 4-bit fields.
h) Filler
In case of an odd number of address signals, the filler code 0000 is inserted
after the last address signal.