Network 250

Netw250 Midterm Exam 300 Points (at least 2 paragraphs per problem)

1. Derive the 64kbps channel for a G.711u codec. From this derive a channelized B8ZS T1 line, using HDSL2 modems, where each channel is switched at the CO. What is the T1 bit length per frame, the frame rate, and the Channel Associated Signaling (CAS) signaling rate per ESF. (50 points)

1. User pick up the phone, and this indicates off-hook condition to apply part of the audio signals over IP Cisco AS5300.

2. Part of the application session VoIP dial tone issue and wait for the user to dial a phone number.

3. User dials the telephone number, and these figures are compiled and stored by the application of the session.

4. After accumulation of sufficient numbers to match the pattern of the composition and destination, the phone number is assigned to the IP host via a specific plan. IP host has a direct connection to any destination telephone number or PBX is responsible for the completion of the call to the composition and pattern of hand.

5. Application manages the session then H.323 session protocol to establish a channel transmission and reception in each direction over the IP. If you are dealing with the call of the PBX, and PBX telephone to make an appeal to the destination. If you configured RSVP, RSVP reservations are put into effect to achieve the desired quality of service (QoS) over the IP.

6. Codecs are enabled for both ends of the connection, and the proceeds conversation using the RTP / UDP / IP as the protocol stack.

7. Are cut off any signs of progress call (or other signals that can be carried in the band) through the voice path is established as soon as the end of the audio channel to the end. Signal can be detected by the voice ports (for example, in the band DTMF digits after the call setup complete) also limited the application of a party to the communication session, and carried out over the network IP encapsulated in RTCP using the RTCP APP extension...