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TIA TT0-201 Exam
Convergence Technologies Professional 2007 (Page 17 )

Updated On: 30-Jan-2026
Page 8 of 40
PDF with 260 Questions

The IP phones for the sales department reside in a separate subnet than the IP PBX. They are having problems registering with the PBX's gateway. You can ping each phone from within the subnet, but not from outside the subnet. Which of the following is the most likely cause of the problem?

  1. The cables connecting the IP phones are category 5, rather than category 5e
  2. QoS has not been enabled on this particular VLAN.
  3. The IP phones are configured with an incorrect subnet mask.
  4. The IP phones are not on the same VLAN as the IP PBX.

Answer(s): C



Which of the following standards allows you to share applications in real-time?

  1. T.120
  2. SIP
  3. H.323
  4. MPEG

Answer(s): A



You have been asked to choose a codec according to the following parameters:
The codec should be standard for convergent voice and video calls
Due to the limited capabilities of the IP phone, the codec should require as little compution power as possible.
The codec should create voice at a bit rate of 8 kbps
The codec must provide a rate as close as possible to toll-quality voice Call will be placed over Internet connection
Which of the following codecs should you choose?

  1. G.711
  2. G.729a
  3. G.726
  4. G.723.1

Answer(s): B



Which of the following describes how SIP and H.323 are expected to perform load balancing natively?

  1. SIP specifies the use of the Callldentifier header. H.323 specifies the use of the Via header in a gateway.
  2. H.323 specifies the use of DNS AAA records. SIP specifies the use of the H.460 series of protocols.
  3. SIP uses gateways. H.323 uses STUN servers.
  4. SIP specifies the use of DNS SRV records. H.323 specifies the use of gateways and the H.225 protocol.

Answer(s): D



You have been asked to troubleshoot a problem where several IP phones cannot access an SIP proxy. You have been told that all SIP proxies and clients in the company are using the standard port as a default. When you viev the various configuration screens, you see the following information:

What is the most likely cause of the problem?

  1. The wrong subnet mask has been specified.
  2. DHCP settings are not configured correctly.
  3. The wrong DNS server has been specified.
  4. The wrong port number is specified in the proxy server.

Answer(s): D



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