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Cisco 642-427 Exam Syllabus Topics:

Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) Sample Questions:

1. What are the three acceptable values for one-way delay, jitter, and packet loss in a VoIP network? (Choose three)

A) 0-150 ms for delay
B) 0-400 ms for delay
C) 1 percent packet loss
D) 1 packet loss
E) 30 ms for jitter
F) 20 ms for jitter

2. Which statement about device mobility is true?

A) When local route groups are used, there is no need to configure device mobility groups or phone device CSSs as long as phone line CSSs are used.
B) When the device mobility group at the home device pool and roaming device pool are not the same, the Phone will keep the home region.
C) When device mobility groups at the home device pool and roaming device pool are the same, the phone will keep the home MRGL setting.
D) When local route groups are used, you must configure device mobility groups and phone device CSSs.

3. Refer to the exhibit. A user at BR1 is on a call to the PSTN through the PRI interface on the local
H.323 gateway. The IP WAN has just failed and the call has been dropped.

What is causing the call to be dropped?

A) The no h225 timeout keepalive command has not been configured on the gateway.
B) The IP phone hasn't registered with SRST.
C) The H.323 gateway has lost the D channel on the PRI.
D) SRST hasn't been configured on the BR1 gateway.

4. You are trying to register Media Gateway Control Protocol (MGCP) gateway with the Cisco CallManager version 3.0(5)a. To register, you execute the following commands:
mgcp
mgcp call-agent 192.168.10.1
ccm-manager mgcp
However, the MGCP gateway still does not register with the Cisco Call Manager. Which two steps should you perform next? (Choose two.)

A) Upgrade the Cisco CallManager version.
B) Run the ping command.
C) Verify the address for the Cisco CallManager.
D) Reboot Cisco CallManager.
E) Restart the MGCP gateway services.
F) Use Cisco CallManager name instead of IP address.

5. Refer to the exhibit.

HQ_MRGL is assigned to the HQ IP phones. BR_MRPGL is assigned to the BR IP phones. The remote site BR IP phones only support G711 codec. When a call is placed from HQ phone, the call fails. Which statement indicates how this issue is resolved?

A) Configure the Transcoder at the HQ site and assign it to HQ_MRG
B) The Transcoder should be assigned to its own MRG, which should then be assigned to the default device pool at HQ.
C) Configure the Transcoder at the BR site and assign it to BR_MRG
D) A Transcoder is not needed. The HQ phones will automatically change over to G 711 codec.

Solutions: