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Downloads Documents File Format
Title: sip Download
 Description: GB specification of the SIP
 Downloaders recently: [More information of uploader sigtran]
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中国电信SIP规范第一部分_总体要求（征.pdf
中国电信SIP规范第二分册（协议细则）（.pdf
中国电信SIP规范第三部分--信令流程（征.pdf

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