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Interworking Switched Circuit and Voice-over–IP Networks

Table of Contents:
Definition and Overview
1. Signaling in Switched-Circuit and VoIP Networks
2. SCTP: Stream Control Transmission Protocol
3. Transporting MTP Over IP
4. Transporting SCCP over IP
5. SIP, PINT, SPIRITS, ENUM, TRIP
Self-Test
Glossary
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Self-Test
1. The SS7 protocol is required to enable telephone calls between the PSTN and IP networks.
a. true
b. false
2. The SS7 protocol enables an Internet telephony switch to support which of the following?
a. toll-free calling
b. calling-card calling
c. local number portability
d. all of the above
3. Each Internet telephony media gateway needs its own dedicated SS7 link.
a. true
b. false
4. Supporting a large Internet telephony switch with over 1,000 trunks can cause _________.
a. inefficient use of the SS7 signaling links
b. excessive delays across the IP network
c. network congestion in the local loop
d. signal degradation in the PSTN
5. The media gateway controller, billing, and database application modules in a distributed IP telephony switch run on which of the following?
a. the same machine
b. different machines in the same CO
c. different machines distributed around the network
d. any of the above
6. A mated pair of SS7/IP gateways can support which of the following?
a. multiple media gateways and media gateway controllers
b. load sharing among redundant IP–telephony modules
c. primary and alternate routes
d. all of the above
7. IP networks provide guaranteed bandwidth for each phone call.
a. true
b. false
8. The voice/data and signaling packets on IP networks have all been standardized to enable interoperability between multiple IP–telephony vendors.
a. true
b. false
9. A single SS7 link can support more than 1,000 trunks.
a. true
b. false
10. An SS7/IP gateway can support multiple distributed IP–telephony switches with a single point code.
a. true
b. false
11. IP–telephony switches can support calls from which of the following?
a. the PSTN to the IP network
b. the PSTN to the PSTN via the IP network
c. the IP network to the PSTN
d. the IP network to the IP network
e. all of the above
Glossary >>

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