Online Access Free 642-432 Practice Test

The illustration above shows the timing and order of arrival of voice packets at the end device. Each voice packet contains 20 ms of voice data. Assuming a play-out buffer of 20 ms, what will happen to voice packet number 3?

• A.Immediately moved to the front of the play-out buffer.
• B.It will be played out in its proper location.
• C.It will be dropped and treated as a lost packet.
• D.It will be played out in the order it is received.

Refer to the exhibit.

Your customer wants to converge the existing PBX network with the IP network.
The three remote offices have various types of PBXs. The customer is using a combination of tie-lines and trunks to connect the PBXs today.
Which kind of connection should be implemented to allow calls to be placed from 201-5551000 to 727-555-1000 so that when the call is completed, network resources are returned for other uses?

• A.PLAR
• B.answer-mode
• C.tie-line
• D.trunk

In North America, which E&M signaling type is used most often for geographically separated equipment?

• A.Type V
• B.Type III
• C.Type II
• D.Type IV
• E.Type I

One voice packet is lost between Phone A and Phone B.
What will be the result to the listener?

• A.The listener will hear the audio normally. Packet loss concealment will make the loss inaudible.
• B.The listener will hear the audio out of order when the lost packet is retransmitted.
• C.The listener will experience a gap in the received audio stream.
• D.The call is terminated.

What is the best description of an MGCP endpoint?

• A.the gatekeepers in a VoIP network
• B.any analog telephony device (PBX, switch, etc.)
• C.the interconnection between packet and traditional telephone networks
• D.IP phones