Connected number
8 7 6 5 4 3 2 1
1 b a a a a a a a
2 - c c c e e f f
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
f) Screening indicator
0 0 reserved (Note)
0 1 user provided, verified and passed
1 0 reserved (Note)
1 1 network provided
NOTE - Code 00 and 10 are reserved for "user provided, not verified"
and "user provided, verified and failed" respectively. Codes 00 and 10 are
for national use.
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
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.