Forward Global Virtual Network Service (GVNS)
8 7 6 5 4 3 2 1
1 OPSP subfield
1 GUG subfield
3 TNRN subfield
The following codes are used in the subfields of the forward GVNS parameter:
a) Originating participating service provider
8
7
6
5
4
3
2
1
1
O/E
Spare
OPSP length indicator
1a
2nd digit
1st digit
...
...
...
1n
Filler (if necessary)
nth digit
Figure 63.2/Q.735 - Originating participating service provider subfield
1) Odd/even indicator (O/E)
0 even number of digits
1 odd number of digits
2) OPSP length indicator
Number of octets to follow. The maximum number of octets is 4, allowing for a maximum number of digits to 7.
3) Digit
Digit string in BCD encoding of flexible length representing the Originating Participating Service Provider (OPSP) identification.
4) Filler
In case of an odd number of address signals, the filler code 0000 is inserted after the last address signal.
b) GVNS user group
8
7
6
5
4
3
2
1
2
O/E
Spare
GUG length indicator
2a
2nd digit
1st digit
...
...
...
2n
Filler (if necessary)
nth digit
Figure 63.3/Q.735 - GVNS user group subfield
1) Odd/even indicator (O/E)
0 even number of digits
1 odd number of digits
2) GUG length indicator
Number of octets to follow. The maximum number of octets is 8, allowing for a maximum number of digits to 16.
3) Digit
Digit string in BCD encoding of flexible length representing the GVNS user group identification (GUG).
4) Filler
In case of an odd number of address signals, the filler code 0000 is inserted after the last address signal.
c) Terminating network routing number
8
7
6
5
4
3
2
1
3
O/E
Numbering plan indicator
TNRN length indicator
3a
Spare
Nature of address indicator
3b
2nd digit
1st digit
...
...
...
3n
Filler (if necessary)
nth digit
Figure 63.4/Q.735 - Terminating network routing number subfield
1) Odd/even indicator (O/E)
0 even number of digits
1 odd number of digits
2) Numbering plan indicator
See 3.9 d)
3) TNRN length indicator
Number of octets to follow. The maximum number of octets is 9 allowing for a maximum number of digits to 15.
4) 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
spare
reserved for national use
1 1 1 1 1 1 1
spare
5) Digit
See 3.9 e)
The most significant digit is sent first. Subsequent digits are sent in successive 4-bit fields.
6) Filler
In case of an odd number of digits, the filler code 0000 is inserted after the last digit.