Case Study: Using a T1 Link as a Tie Line

Review Questions

1	Voice is sensitive to delay, jitter, and packet drops. What are the recommended maximum values for each of these?
2	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?
3	Data packets can be large compared to voice packets. Why is this a problem across a WAN link, and how can you remedy it?
4	What is the difference between fax/modem relay and passthrough?
5	What are the two types of fax relay that Cisco routers use, and which is the default type?
6	In which configuration mode are fax/modem commands given on MGCP gateways? How about H.323 and SIP gateways?
7	How does SRTP protect voice media traffic?
8	When using encrypted voice within a LAN, why is it a good idea to also encrypt traffic between the voice gateway and Cisco CallManager?
9	How is firewall function affected if an IPsec tunnel from a remote gateway terminates on the Cisco CallManager, rather than another device?