Cisco 400-051 CCIE Collaboration Online Training
Cisco 400-051 Online Training
The questions for 400-051 were last updated at Oct 23,2025.
- Exam Code: 400-051
- Exam Name: CCIE Collaboration
- Certification Provider: Cisco
- Latest update: Oct 23,2025
Refer to the exhibit.
Which SIP response message should the TGW send if it cannot process the tunneled QSIG messages from the OGW?
- A . 405 Method Not Allowed
- B . 406 Not Acceptable
- C . 412 Conditional Request Failed
- D . 415 Unsupported Media Type
- E . 485 Ambiguous
Refer to the exhibit.
During a QSIG tunneling over SIP call establishment, which two types of SIP messages can the OGW use to tunnel a waiting QSIG message? (Choose two.)
- A . SIP re-INVITE
- B . SIP NOTIFY
- C . SIP INFO
- D . SIP OPTIONS
- E . SIP UPDATE
- F . SIP REFER
In a SIP REFER-based call transfer, which SIP message is being used by the recipient to notify the originator that the final recipient was successfully contacted?
- A . 200 OK
- B . NOTIFY with a message body of 200 OK
- C . 202 Accepted
- D . 100 Trying
- E . 200 BYE
Refer to the exhibit.
Which user agent has the recipient role in this SIP REFER call transfer?
- A . user agent A
- B . user agent B
- C . user agent C
- D . user agent B and C
- E . user agent A and B
Refer to the exhibit.
You received this debug output to troubleshoot a Cisco IOS MGCP gateway media-related problem at a customer site.
What is the purpose of this message?
- A . The MGCP gateway is responding to an RQNT message from Cisco Unified Communications Manager to poll the media capabilities on its endpoints.
- B . The MGCP gateway is responding to an AUEP message from Cisco Unified Communications Manager to poll the media capabilities on its endpoints.
- C . The MGCP gateway is responding to an AUCX message from Cisco Unified Communications Manager to poll the active calls on its endpoints.
- D . The MGCP gateway is responding to an MDCX message from Cisco Unified Communications Manager during a call setup.
- E . The MGCP gateway is responding to a CRCX message from Cisco Unified Communications Manager during a call setup.
Which device is the initiator of a StationD message in a Cisco Unified Communications Manager SDI trace?
- A . SCCP IP phone
- B . SIP IP phone
- C . Cisco Unified Communications Manager
- D . MGCP analog gateway
- E . digital voice gateway
What is the maximum length of any numeric geographic area address in ITU recommendation E.164?
- A . 15
- B . 18
- C . 21
- D . 22
- E . 25
According to ITU-T E.164 recommendations, which two fields in the National Significant Number code may be further subdivided? (Choose two.)
- A . Country Code
- B . National Destination Code
- C . Subscriber Number
- D . Regional Significant Number
- E . Local User Code
- F . National Numbering Plan
Refer to the exhibit.
A user is going through a series of dialing steps on a SIP Type B IP phone (for example, a Cisco 7975) to call an SCCP IP phone. Both phones are registered to the same Cisco Unified Communications Manager cluster. Assuming that the calling SIP phone is not associated with any SIP dial rules, which statement about how digits are forwarded to Cisco Unified Communications Manager for further call processing is true?
- A . Each digit is sent to Cisco Unified Communications Manager in a SIP NOTIFY message KPML event, at the time that the user enters the digit on the keypad.
- B . The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending each digit to Cisco Unified Communications Manager as a separate KPML event in a SIP NOTIFY message.
- C . The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending all digits to Cisco Unified Communications Manager in a SIP INVITE message.
- D . The SIP IP phone will wait for the interdigit timer to expire or for the Dial softkey to be selected before sending the first digit in a SIP INVITE and the subsequent digits in SIP INFORMATION messages.
- E . The SIP IP phone will send all digits to Cisco Unified Communications Manager in a SIP INVITE message as soon as the fourth digit is pressed.
Refer to the exhibit.
A user is going through a series of dialing steps on a SIP Type B IP phone (for example, a Cisco 7975) to call an SCCP IP phone. Both phones are registered to the same Cisco Unified Communications Manager cluster. Assuming the calling SIP phone is associated with a SIP dial rule with a pattern value of 2001, which statement about how digits are forwarded to Cisco Unified Communications Manager for further call processing is true?
- A . As each digit is pressed on the SIP IP phone, it is sent to Cisco Unified Communications Manager in a SIP NOTIFY message as a KPML event.
- B . The SIP IP phone will wait for the interdigit timer to expire, and then send each digit to Cisco Unified Communications Manager as a separate KPML event in a SIP NOTIFY message.
- C . The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending all digits to Cisco Unified Communications Manager in a SIP INVITE message.
- D . The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending the first digit in a SIP INVITE and the subsequent digits in SIP INFORMATION messages.
- E . The SIP IP phone will wait for the interdigit timer to expire, and then send all digits to Cisco Unified Communications Manager in a SIP INVITE message.
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