Study tips 642-457

Which task must you perform before deleting a transcoder?

How many active gatekeepers can you can define in a local zone?

Which codec is recommended by Cisco for multisite music on hold deployment that spans through the WAN links?

Which two locations can you verify to find the IP phones that have their firmware mismatched?

Which interface can you use to configure alarms and traces in Cisco Unified Communications Manager?

Which solution is needed to enable presence and extension mobility to branch office phones during a WAN failure?

Which command displays the detailed configuration of all the Cisco Unified IP phones, voice ports, and dial peers of the Cisco Unified SRST router?

Which option configures the secondary dial tone option for SRST mode to let the users hear the dial tone for PSTN calls?

how does the phone recognize that the primary server is back?

Which statement about the function of the "+" symbol in the E.164 format is true?