642-457 무료 덤프문제 온라인 액세스

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

• A.The "+" symbol matches the preceding element zero or one time.
• B.The "+" symbol matches the preceding element one or more times.
• C.The "+" symbol represents the international call prefix.
• D.The "+" symbol represents the international country code.

Which system configuration is used to set audio codecs?

• A.region
• B.licensing
• C.location
• D.physical location

Refer to the exhibit.

Which statement about the configuration between the Default and BR regions is true?

• A.Calls between the two regions can use either 64 kbps or 8 kbps.
• B.Calls between the two regions can use only the G.729 codec.
• C.Both codecs can be used depending on the loss statistics of the link. When lossy conditions are high, the G.711 codec will be used.
• D.Only 64 kbps will be used between the two regions because the link is "lossy".

Which two statements about remote survivability are true? (Choose two.)

• A.Cisco Unified Communications Manager Express in SRST mode supports more Cisco IP Phones than SRST.
• B.SRST supports more Cisco IP Phones than Cisco Unified Communications Manager Express in SRST mode.
• C.MGCP fallback functions with SRST.
• D.MGCP fallback is required for ISDN call preservation.

Which statement is true when considering a Cisco VoIP environment for regional configuration?

• A.G.729 requires 24K of bandwidth per call.
• B.G.711 requires 128K of bandwidth per call.
• C.To deploy a Cisco H.323 gatekeeper, you must configure MTP resources on the gatekeeper and only use G.711 between regions.
• D.The default codec does not matter if you have defined a hardware MTP in your Cisco Unified Communications Manager environment.