Which codec does Cisco recommend tor WAN link?

Which codec does Cisco recommend tor WAN link?

Which codec does Cisco recommend tor WAN link?

A.
G.711

B.
G 723

C.
G 728

D.
G 729

Explanation:
When bandwidth is abundantly available, as in a LAN environment, the Cisco IP phone default G.711 is used in RTP. When bandwidth is at a premium, as on a slow WAN link, G.729 is used.
Link: http://www.globalknowledge.fr/PDF/WP_UnifiedComm.pdf



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