3.34	MLPP precedence
The format of the MLPP precedence parameter field is shown in Figure 35.


8
7
6
5
4
3
2
1

1
Spare
LFB

Spare
Precedence level



2
1st NI digit



2nd NI digit



3
3rd NI digit



4th NI digit




4
MLPP service domain








5








6








Figure 35/Q.763 - MLPP precedence parameter field
The following codes are used in the subfields of the MLPP precedence parameter field:
a)	LFB
0 0
LFB allowed
0 1
Path reserved (national use)
1 0
LFB not allowed
1 1
spare
b)	Precedence level
0 0 0 0
flash override
0 0 0 1
flash
0 0 1 0
immediate
0 0 1 1
priority
0 1 0 0
routine

spare
c)	Network Identity (NI) octet 2 and 3
Each digit is coded in binary coded decimal representation from 0 to 9.
The first digit of this field is coded 0. The TCC (Telephony Country Code) follows in the second to fourth NI digits (the most significant TCC digit is in the 2nd NI digit). If the TCC is one or two digits long, the excess digit(s) is inserted with the co
de for ROA or network identification, if necessary. If octet 3 is not required, it is coded all zeros.
d)	MLPP service domain (octet 4, 5 and 6)
A code pure binary coded allocated to a MLPP service domain administered by a particular ISDN. Bit 8 of octet 4 is the most significant and bit 1 of octet 6 is the least significant respectively.