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Cisco 300-815 Exam (page: 1)
Cisco Implementing Advanced Call Control and Mobility Services (CLASSM)
Updated on: 12-Feb-2026

Viewing Page 1 of 32
300-815 PDF 245 Questions



Refer to the exhibit. In an active SIP call between phone user A and phone user B, phone A initiates a call transfer to phone user C. What are two results from this action? (Choose two.)

  1. Phone_A sends a SIP-REFER message to the Cisco UCM with Phone_C information in the Refer-To section.
  2. Phone_B sends a SIP-REFER message to the Cisco UCM with Phone_C information in the Refer-To section.
  3. As soon as Phone_A presses the Transfer button for the first time, Phone_B hears the MOH, and the MOH audio is chosen from Phone_B User Hold MOH Audio Source settings.
  4. As soon as Phone_A presses the Transfer button for the first time, Phone_B hears the music on hold, and the MOH audio is chosen from Phone_A Network Hold MOH Audio Source settings.
  5. As soon as Phone_A presses the Transfer button for the first time, Phone_B hears the MOH, and the MOH audio is chosen from Phone_A User Hold MOH Audio Source settings.

Answer(s): A,C





Refer to the exhibit. Users report that when they dial to Cisco Unity Connection from an external network, they cannot enter any digits. Assuming only in-band DTMF is supported, what is a reason for this malfunction?

  1. The negotiated RTP port is outside of the range described by RFC, so inband DTMFs do not work.
  2. There is SIP Delayed Offer. DTMF is supported only in Early Offer.
  3. The rtpmap:0 value for the negotiated codec is marking DTMF as inactive.
  4. No DTMF is negotiated.

Answer(s): D



An administrator is troubleshooting a one-way audio issue for a call that uses H.323 protocol in slow-start mode. The administrator requests that the IP and port information of the Real-Time Transport Protocol traffic that had the one-way audio call is provided. The H.225 and H.245 messages for one of the one-way audio calls are gathered and the call flow has not invoked any media resources.
Where is the RTP IP and port information for both sides found?

  1. H.245 Terminal Capability Set
  2. H.245 Open Logical Channel
  3. H.225 Connect
  4. H.245 Open Logical Channel Ack

Answer(s): B


Reference:

http://ccievoicehopeful.blogspot.com/2012/09/h323-notes.html



Which two extended capabilities must be configured on dial peers for fast start-to-early media scenarios (H.323 to SIP interworking)? (Choose two.)

  1. DTMF
  2. BFCP
  3. VIDEO
  4. FAX
  5. AUDIO

Answer(s): A,B



When an administrator troubleshoots H.323 call setup, which message gives an alert that the called party is being notified about the call?

  1. ALERTING
  2. PROCEEDING
  3. CONNECT
  4. RINGING

Answer(s): C



End users at a new site report being unable to hear the remote party when calling or being called by users at headquarters. Calls to and from the PSTN work as expected. To investigate the SIP signaling to troubleshoot the problem, which field can provide a hint for troubleshooting?

  1. Contact: header of the 200 OK response
  2. Allow: header if the 200 OK response
  3. o= line of SDP content
  4. c= line of SDP content

Answer(s): C



Why would RTP traffic that is sent from the originating endpoint fail to be received on the far endpoint?

  1. The far end connection data (c=) in the SDP was overwritten by deep packet inspection in the call signaling path.
  2. Cisco UCM invoked media termination point resources.
  3. The RTP traffic is arriving beyond the jitter buffer on the receiving end.
  4. A firewall in the media path is blocking TCP ports 16384-32768.

Answer(s): D



An administrator is troubleshooting call failures on an H.323 gateway via the CLI. To see signaling for media and call setup, which two debugs should the Administrator turn on? (Choose two.)

  1. H.323 messages
  2. H.225 asn1
  3. H.245 asn1
  4. H.225 media
  5. H.323 asn1

Answer(s): B,C



Viewing Page 1 of 32



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