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.