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Carrier-Class, High Density Voice over Packet (VoP) Gateways

Table of Contents:
Definition and Overview
1. Introduction
2. Meeting Service Provider Requirements with Solution Density
3. High-Density VoP Architecture
4. Conclusion
Self-Test
Glossary
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Self-Test
1. Which of the following is an advantage that packet-based voice provides over circuit-switched voice?
a. bandwidth can be significantly reduced through VAD
b. faster time to market for new services
c. capital investment for packet-based platforms is significantly less than circuit-switched equivalent
d. all of the above
2. Early VoP applications were targeted at providing lower-cost data services.
a. true
b. false
3. VoP gateways are being implemented for a number of applications ranging from small two-port integrated access devices (IADs) for the consumer and telecommuter to very large carrier-class gateways used as Class-5 switch replacements.
a. true
b. false
4. Standards for VoP quality and network reliability are the same as for traditional telephone networks.
a. true
b. false
5. The most important performance specification is not ___________ but ___________.
a. power per channel but channels per chip
b. channels per chip but power per channel
6. The ____________ module performs the overall network management for the equipment.
a. alarm monitor & control
b. call processing
c. PSTN interface
d. switch fabric
e. VoP
7. The ____________ module performs the routing of cells/packets through the system.
a. alarm monitor and control
b. call processing
c. PSTN interface
d. switch fabric
e. VoP
8. The ____________ modules consist of a “farm” of DSPs that perform the actual conversion of the voice streams between the PSTN and packet worlds.
a. alarm monitor and control
b. call processing
c. PSTN interface
d. switch fabric
e. VoP
9. ___________ becomes a problem in packet networks because the delay is almost always greater than 50 milliseconds.
a. Tone
b. Packetization
c. Echo
d. Support
10. Fax and modem can be handled by a technique known as “PCM up-speed” where the VoP system, upon detection of fax or modem, forwards all data for a given channel as a 64 kbps transparent PCM stream between the two end points.
a. true
b. false
Glossary >>

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