Voice is sensitive to delay, jitter, and packet drops. What are the recommended maximum values for each of these?
When you use the Modular QoS CLI, or MQC, what steps are involved in setting a bandwidth limit for voice traffic that is sent out an interface?
Data packets can be large compared to voice packets. Why is this a problem across a WAN link, and how can you remedy it?
What is the difference between fax/modem relay and passthrough?
What are the two types of fax relay that Cisco routers use, and which is the default type?
In which configuration mode are fax/modem commands given on MGCP gateways? How about H.323 and SIP gateways?
How does SRTP protect voice media traffic?
When using encrypted voice within a LAN, why is it a good idea to also encrypt traffic between the voice gateway and Cisco CallManager?
How is firewall function affected if an IPsec tunnel from a remote gateway terminates on the Cisco CallManager, rather than another device?
Part I: Voice Gateways and Gatekeepers
Gateways and Gatekeepers
Part II: Gateways
Media Gateway Control Protocol
Session Initiation Protocol
Connecting to the PSTN
Connecting to PBXs
Connecting to an IP WAN
Influencing Path Selection
Configuring Class of Restrictions
SRST and MGCP Gateway Fallback
Using Tcl Scripts and VoiceXML
Part III: Gatekeepers
Part IV: IP-to-IP Gateways
Cisco Multiservice IP-to-IP Gateway
Appendix A. Answers to Chapter-Ending Review Questions