Which protocol is used between two Cisco IP phones once Cisco Unified Communications Manager Express connects a call?
A. H.323
B. RTP
C. SCCP
D. SIP
Which protocol is used between two Cisco IP phones once Cisco Unified Communications Manager Express connects a call?
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answerhappygod
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Which protocol is used between two Cisco IP phones once Cisco Unified Communications Manager Express connects a call?
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