ITU-T 相关标准

G.168 - Digital network echo cancellers

消除回波的重要标准

下载：
http://www.vsi.ru/library/ITU-T/original/recs/g/g0168e.zip

G.168 Configurations:
· 16 msec tail.
· 32 msec tail
· 48 msec tail
· 64 msec tail

Example Resource Requirements (ADSP-2181):
· 3.7 MIPS for 16 msec.
· 5.8 MIPS for 32 msec.
· 7.9 MIPS for 48 msec
· 10.1 MIPS for 64 msec

ITU E.164
Operation, numbering, routing and mobile services –
International operation – Numbering plan of the
international telephone service
简介：
Dial plan 的主要标准。
下载：
http://www.vsi.ru/library/ITU-T/original/recs/e/e0164e.zip