The following questions test your knowledge of topics explained in this chapter. You can find the answers to the questions in Appendix A, "Answers to Chapter Review Questions."
If a client picked up a customer service handset and was automatically connected to customer service without dialing any digits, what kind of call would it be?
Cisco CallManager-to-Cisco CallManager call
Which configuration parameter would you change to set the dial tone, busy tone, and ringback tone on an FXS port?
What are the two options for the linecode command on an E1 connection?
What are the two options for the framing command on a T1 connection?
What is the purpose of T-CCS?
To route calls between PBXs
To provide point-to-point connections between PBXs
To pass proprietary signaling between PBXs
To specify a channel for standards-based call signaling
What is the best time to change default voice port configurations to tune voice quality?
Before you set up the network
After the network is up and running
After two dial peers experience poor quality
When there is a network failure
Which command is used to enable residual echo suppression?
no echo-cancel enable
Which two of the following are echo cancellation standards?
Which of the following statements best describes when echo occurs?
When there is a mismatch in signaling types
When impedance mismatches reflect power back to the source
When the far-end impedance absorbs the signal
When the router processor utilization is too high to run the companding algorithm in a timely manner
Why does echo usually go unnoticed in a traditional telephony network?
The volume of the echo is high.
The delay between the original voice signal and the echo is low.
Traditional telephony networks do not suffer from impedance mismatches.
Traditional telephony networks negate inductance through the use of load coils.