收文过程中签收的任务包括：（）、（）和签字。

A. 荆芥、防风
B. 麻黄、桂枝
C. 羌活、独活
D. 辛夷、苍耳子
E. 紫苏、生姜

A. analog trunks that provide the Survivable Remote Site Telephony (SRST) feature
B. analog trunks that provide VoIP gateway functionality
C. analog trunks that connect a gateway to plain old telephone service (POTS) device such as analog phones, fax machines, and legacy voice-mail systems
D. analog trunks that connect a gateway to a central office (CO) or private branch exchange (PBX)