8.	Amendments to Recommendation G.711 (Fascicle III.3 of the Red Book)



8.1	Delete Note 2 to Tables 3 and 4 and the associated small table.



8.2	Add a fourth paragraph to Note 3*:



	"The A-µ-A transparency for bits 1 to 7 was achieved by modifying the table slightly 
from the optimum conversion in that µ-80 is converted to A-81 instead of A-80, and 
A-80 is converted to µ-79 instead of µ-80. This has an insignificant effect on quan-
tizing distortion".



8.3	Add a new section 3.6 as follows:



"3.6	Conversion to and from uniform PCM



	Every "decision value" and "quanitized value" of the A (resp. µ) law should be asso-
ciated with a "uniform PCM value". (For a definition of   "decision value" and 
"quantized value", see Recommendation G.701 and in particular Figure 2/G.701.) 
This requires the application of a 13 (14) bit uniform PCM code. The mapping from 
A-law PCM, and µ-law PCM, respectively, to the uniform code is given by Tables 1/
G.711 and 2/G.711. The conversion to A-law or µ-law values from uniform PCM 
values corresponding to the decision values, is left to the individual equipment spec-
ification. One option is described in RecommendationG.721, § 4.2.7 subblock 
COMPRESS.".



8.4	Add the following note to clarify the content of Tables 1/G.711 and   2/G.711:



"Note 5 - In Tables 1/G.711 and 2/G.711 the values of the uniform code are given in 
columns 3, 5 and 7."



	Furthermore, at the heads of Tables 1 and 2, the entry in column 7 should be changed 
as follows:



"Quantized value

(value at decoder

output), Yn"



8.5	Insert a new section 4 and to renumber present section 4 as section 5:



"4	Transmission of character signals



	When character signals are transmitted serially, i.e. consecutively on one physical 
medium, bit No. 1 (polarity bit) is transmitted first and No.8 (the least significant 
bit) last."



8.6	The following note should be added to new section 5:



Note - The use of another digital periodic sequence representing a nominal reference 
frequency of 1 020 Hz at a nominal level of -10 dBm0 (preferred value, see 
RecommendationO.XX) or 0 dBm0 is acceptable, provided that the theoretical 
accuracy of that sequence does not differ more than + 0.03 dB from a level of   -10 
dBm0 or 0 dBm0 respectively. In accordance with Recommendation O.XX, the 
specified frequency tolerance should be 1 020 Hz + 2 Hz, - 7 Hz.



	If a sequence representing -10 dBm0 is used, the nominal level at the voice fre-
quency outputs should be -10 dBm0.