A.DeploymentofBusinessReadyTeleworkerwithVoIPisnotrecommended.
B.Thecustomer’sexistingPBXmustfirstbereplacedwithCiscoIPTelephonysolution.
C.BusinessReadyTeleworkerandCiscoIPTelephonycanbedeployedinparalleltotheexistingPBX，integratingthetwowithtrunking.
D.Deploymentisrecommendedonlyforfull-timeTeleworkerswhohavenoothercorporatephone.
正确答案：参考C
