Transfer / REFER draft-ietf-sip-cc-transfer-05.txt draft-ietf-sip-refer-02.txt
https://www.powershow.com/viewfl/273d33-ZDc1Z/Transfer_REFER_draft-ietf-sip-cc-transfer-05_txt_draft-ietf-sip-refer-02_txt_powerpoint_ppt_presentation
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