Annex D05 IP Trunking

Question 0

Digital Signal Processor

Answer 0

DSP is a chip that performs all the sampling, encoding and compression functions on analog audio coming into a router or media gateway device on a packet switching network

Question 1

Voice Packetization

Answer 1

Exact length of time a CODEC is applied to an analog voice stream to construct a single digital packe

Question 2

Voice Port

Answer 2

Voice ports enable T1 trunk coming from a circuit switchboard to be terminated at a packet switching network router for the purpose of either uing the IP network to extend a T1 trunk to another distant circuit switchboard or to integrate your circuit switching network with a seperate VoIP network

Question 3

Transcoding

Answer 3

Direct conversion from one codec to another

Eg using G.729 to compress a signal that was encoded for G.711

Question 4

Media Gateway Device

Answer 4

Allow PSTN (Public Switched Telephone Network) or DSN (Defense Switched Network) to use the packet switching network to extend telephone trunks (T1s) long distance

Enable interoperability between VoIP phones and POTS phones

Question 5

Network convergence as it applies to comm networks

Answer 5

Network convergence is the combination of voice, video, and data services across the same network infrastructure

Question 6

IP Trunking

Answer 6

Method of trunk extension where two circuit switchboards are logically connected together by a T1 that traverses the packet switching network