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An ACME company employee complained about a recent poor-quality VoIP call while moving around their office environment HPE Aruba Networking Central reported a fair UCC score for this call while your VoIP engineer reported that their systems reported a MOS of 2, 3. The VoIP devices are operating over the 5GHz frequency band.
What are the possible contributing factors? (Select two.)
Suggested Answer: A
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USB dongles often require additional power, which may exceed the power delivery capabilities of Class 4 PoE switches. Aruba AP-615 and AP-635 are designed to work with USB dongles that require additional power for proper operation. Since the Cat 6A cable can support higher power levels, replacing the Class 4 PoE switches with Class 6 PoE switches, which can deliver higher power, should resolve the issue with the dongles not powering up.
36 comments · newest first
YO
Yolande
11 months ago
Zigbee interference? That's surprising!
KA
Kanisha
11 months ago
Wait, 802.tr in WLAN settings? Is that really a problem?
DE
Denny
11 months ago
Coverage overlap is crucial for good calls, too!
EL
Elliott
12 months ago
I agree, localized interference makes sense.
BO
Bobbye
12 months ago
Sounds like interference could be a big issue here.
EU
Eulah
12 months ago
I recall that 802.1K is related to network security, but I'm not sure how it would impact VoIP calls directly.
GE
Georgiana
1 year ago
I practiced a similar question about roaming issues, and I think E could be relevant if the client moved into a Zigbee area.
KR
Krissy
1 year ago
I'm not entirely sure, but I think localized interference could definitely affect call quality, so C seems likely too.
CH
Christoper
1 year ago
I remember we discussed how coverage and cell overlap are crucial for VoIP quality, so I think A might be a factor.
CA
Casey
1 year ago
This seems like a good opportunity to apply my knowledge of wireless networking best practices. I'll focus on analyzing the AP deployment and potential sources of interference in the office environment.
TA
Tarra
1 year ago
Based on the information provided, I'm leaning towards either the coverage issue or the localized interference as the most likely culprits. I'll make sure to carefully evaluate those two options.
EL
Elfriede
1 year ago
I'm a bit confused by the mention of 802.tr and 802.1K in the options. I'll need to double-check my understanding of those standards to determine if they're relevant here.
ME
Merilyn
1 year ago
Okay, let's see. The low MOS score and the UCC report suggest there's likely an issue with the wireless connection. I'm thinking it could be either coverage or interference-related.
JE
Jenise
1 year ago
Hmm, this seems like a tricky one. I'll need to carefully consider the details about the VoIP call and the network environment.
ST
Staci
1 year ago
I'm just picturing the VoIP engineer throwing their hands up in the air, muttering 'MOS of 2-3? That's not very mossy of you, is it?'
BI
Billye
1 year ago
C: Yeah, those could definitely be contributing factors to the poor-quality VoIP call.
SH
Shawnna
1 year ago
B: Or there could have been localized interference at the caller's location.
ME
Merilyn
1 year ago
A: Maybe the coverage AP deployment plans are the issue.
VO
Von
1 year ago
Ah, the age-old struggle of VoIP vs. the office environment. Coverage and interference, my friends. I bet the poor employee was walking around like a zombie, trying to get a decent call.
TE
Tequila
1 year ago
I'm going with coverage and interference too. 802.1K? What is this, a network exam from the 90s? That's got to be a red herring.
AI
Aimee
1 year ago
E) The client roamed into an area that continuously operates Zigbee.
WI
Willard
1 year ago
Yeah, I agree. Those seem like the most likely factors. 802.1K does seem outdated.
JU
Julieta
1 year ago
C) There was localized interference at the caller's location
NO
Novella
1 year ago
A) Coverage AP deployment plans generally don't support enough cell overlap for VoIP.
IR
Irma
1 year ago
Coverage and interference, for sure. I mean, who uses Zigbee in an office these days? That's just asking for trouble with your VoIP.
EL
Elbert
1 year ago
C) There was localized interference at the caller's location
MA
Maurine
1 year ago
A) Coverage AP deployment plans generally don't support enough cell overlap for VoIP.
LO
Louvenia
2 years ago
I bet it's the coverage and interference issues. VoIP is pretty sensitive to those kinds of problems. The MOS score of 2-3 is pretty low, so that tracks.
QU
Quentin
1 year ago
C) There was localized interference at the caller's location
EL
Elvis
1 year ago
A) Coverage AP deployment plans generally don't support enough cell overlap for VoIP.
MI
Mitzie
1 year ago
C) There was localized interference at the caller's location
SI
Silvana
1 year ago
A) Coverage AP deployment plans generally don't support enough cell overlap for VoIP.
AL
Alysa
2 years ago
Maybe the AP deployment plans not supporting enough cell overlap is also a factor.
TO
Torie
2 years ago
Hmm, I'm not sure about the 802.tr one. Isn't that something to do with time-sensitive networking? The interference and Zigbee factors seem more likely to me.
AN
Antonio
2 years ago
I agree, that could definitely affect the call quality.
GA
Gabriele
2 years ago
I think the localized interference could be a contributing factor.