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Cisco 300-815 Exam
Implementing Cisco Advanced Call Control and Mobility Services (CLASSM) (Page 9 )

Updated On: 12-Feb-2026
Page 9 of 50
PDF with 245 Questions

An engineer must verify that a Cisco 8865 telephone is advertising unsolicited NOTIFY with out-of-band DTMF relay for SIP. The solution is using Cisco UCME and Cisco Unified Border Element. How must the engineer look for this confirmation?

  1. On IOS, run the debug ccsip all command and look for "Call-Info…..method="NOTIFY ;Event=telephone-event" inside the NOTIFY message.
  2. On IOS, run the debug ccsip dtmf command and look for "Call-Info…..method="NOTIFY ;Event=telephone-event" inside the NOTIFY message.
  3. On IOS, run the debug ccsip messages command and look for "Call-Info…..method="NOTIFY ;Event=telephone-event" inside the INVITE message.
  4. On IOS, run the debug ccsip all command and look for "Call-Info…..method-'NOTIFY ;Event=DTMF" inside the INVITE message.

Answer(s): A

Explanation:

To verify that the Cisco 8865 phone is using unsolicited NOTIFY with out-of-band DTMF relay, the engineer must capture and inspect SIP messages. The debug ccsip all command provides detailed SIP signaling, and the presence of "Call-Info: ... method="NOTIFY"; event=telephone-event" inside the NOTIFY message confirms that DTMF is being sent out-of-band using NOTIFY, as expected.



A company is using a H.323 gateway for PSTN calls from Cisco phones connected to a Cisco UCM cluster. There are reports of problems getting audio on these incoming calls from the PSTN. The phone rings, but nothing is heard and the call disconnects.
Which command troubleshoots this issue?

  1. debug h245 asn1
  2. debug h245 pstn
  3. debug voice h323 inout
  4. debug voice sip inout

Answer(s): C

Explanation:

The debug voice h323 inout command is used to troubleshoot H.323 call signaling and media negotiation issues between Cisco Unified CM and an H.323 gateway. It provides visibility into call setup, media channel establishment, and disconnect causes, which is essential when calls ring but fail to establish audio and then drop.



Which top-level IOS command is needed to begin the configuration of a Cisco Unified Communications Manager Express gateway to enable phones to be registered via SIP?

  1. allow-connections sip to sip
  2. voice service voip
  3. voice register global
  4. voice register dn

Answer(s): C


Reference:

https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications- manager-express/99946-cme-sip-guide.html



An IP Telephony administrator is deploying IP phones. The administrator has an existing Cisco UCME router with several SCCP & SIP phones registered. The administrator receives a request for a new SIP phone with MAC address 1111.2222.3333 and directory number 2050 to be added in the Cisco UCME. Which two configurations should be added in CME to support this request? (Choose two.)






Answer(s): D,E



An engineer must implement call restriction to toll-free numbers using a class of restriction in a branch Cisco UCME. In which two places is the corlist incoming or cor incoming command configured? (Choose two.)

  1. "voice register pool " configuration mode
  2. "ephone-dn " configuration mode
  3. "dial-peer cor custom " configuration mode
  4. "voice register global " configuration mode
  5. "telephony-service " configuration mode

Answer(s): A,B






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