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Exam 350-801 topic 1 question 197 discussion

Actual exam question from Cisco's 350-801
Question #: 197
Topic #: 1
[All 350-801 Questions]



Refer to the exhibit. A user takes a phone from San Francisco to New York for a short reassignment. The phone was set up to use the San Francisco device pool, and device mobility is enabled on the Cisco UCM. The user makes a call that matches a route pattern in a route list that contains the Standard Local Route Group.
To where does the call retreat?

  • A. The call egresses in San Francisco because the user uses device mobility and is allowed to roam while still keeping the number and resources assigned in San Francisco.
  • B. The call egresses in New York because the device automatically is assigned a New York device pool and uses the local gateway.
  • C. The call fails because device mobility is turned on, and the phone is not configured in New York. The engineer must configure which sites the device should be roaming to.
  • D. The call fails because the Standard Local Route Group is being used only if no configuration is set for the device pools.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by Slushed at May 2, 2022, 4:29 a.m.

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Slushed
Highly Voted 2 years ago
Selected Answer: B
Correct answer is B. The point of Device Mobility is for devices that are moved to a new location to utilize the resources local to that location.
upvoted 10 times
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G0y0
Most Recent 2 months, 1 week ago
Selected Answer: B
Interesting question, it is combining Standard Local Route Group and Device Mobility. First, by step, remember that: When a roaming device moves to another location in a different device mobility group: Roaming Device Pool: yes Location: Roaming device pool setting Region: Roaming device pool setting Media Resources Group List: Roaming device pool setting Device CSS: Home location settings AAR Group: Home location settings AAR CSS: Home location settings.
upvoted 1 times
G0y0
2 months, 1 week ago
In this case, the SFO user remains with his home CSS, but now with the NY DP. Second step: The Home CSS (SFODevices) have a partition pointing a RP (US_pstn_part) targeting a RL (US LOC RL) with a Standard Local Route Group. As the SFO user has now the Remote DP (JFK_dp, not the Home SFO_dp), then Standard Local Route Group will select NY Gateway for these national call, also it will take the media resources from NY Gateway. So Answer B is in compliance with the behavior of this framework
upvoted 1 times
G0y0
2 months, 1 week ago
If certain calls from roaming endpoints need to be routed through gateways local to the home site of the roaming phone, then routing for these calls has to be implemented through route patterns pointing to route lists that use fixed site-specific route groups instead of Standard Local Group. If this were the case, then A would be the correct answer. References: "Feature Configuration Guide for Cisco Unified Communications Manager, Release 12.5(1)", Chapter 4: Device Mobility, Table 4: Device Mobility Scenarios. "Cisco Collaboration System 12.x Solution Reference Network Designs SRND", Chapter 21: Mobile Collaboration, section: "Dial Plan Design Considerations"
upvoted 2 times
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c37e2aa
3 months ago
Selected Answer: A
DMG is not the same, so the Device Mobilty realted Information will not be applied.
upvoted 1 times
G0y0
2 months, 1 week ago
That is correct, however, Roaming-sensitive settings are being applied, so it is taking the remote DP. Also, as the home CSS is pointing to a RP targeting a Standar Local Route Group, it will select the gateway with the current DP (in this case is the remote DP), and then it will select the remote gateway (NY gateway) to release the call and the media resources of the same remote gateway.
upvoted 1 times
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cuernov
6 months, 1 week ago
this question is missing a image.
upvoted 1 times
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Panda_man
1 year, 3 months ago
Selected Answer: B
B for sure
upvoted 1 times
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DaKenjee
1 year, 5 months ago
Selected Answer: B
Answer B Standard local route group would use San Francisco device pool, if there is no device mobility active Device Mobility Info Configuration delivers by IPv4 Subnet a selected Device Pool ; in this case new york device pool and its local gateway in new york
upvoted 4 times
DaKenjee
1 year, 5 months ago
They used pictures and explanation from SRND Example 14-3 Device Mobility https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/dialplan.html
upvoted 3 times
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MPLM
1 year, 7 months ago
B is the correct answer https://community.cisco.com/t5/collaboration-knowledge-base/device-mobility/ta-p/3124062
upvoted 1 times
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AAMM
1 year, 11 months ago
B is the answer
upvoted 1 times
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C (25%)
B (20%)
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