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YD/T 1193.2-2002 Bearer independent call control specificaiton--Part 2:general function and format of messages and parameters for BICC 1875 (USD) via email in 1-10 business day VALID
YD/T 1193.4-2002 Bearer Independent Call Control(BICC) specification--Part 4:Application transport Mechanism(APM) tunneling and IP bearer control protocol of BICC 495 (USD) via email in 1-5 business day VALID
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