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Cisco 300-815 Exam - Topic 12 Question 129 Discussion

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?
C) debug h245 asn1
A) debug voice h323 inout
B) debug h245 pstn
D) debug voice sip inout

Cisco 300-815 Exam - Topic 12 Question 129 Discussion

Actual exam question for Cisco's 300-815 exam
Question #: 129
Topic #: 12
[All 300-815 Questions]

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?

Show Suggested Answer Hide Answer
Suggested Answer: C

by Gerald at Jul 16, 2026, 02:33 PM

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Trevor
21 hours ago
I feel like B could help too, focusing on H.245 issues.
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Vonda
6 days ago
I think option A is the best choice. It targets H.323 specifically.
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Freeman
11 days ago
Definitely A, it's the most relevant for H.323 issues.
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Alba
16 days ago
C) debug h245 asn1 could help too, but not sure it's the best choice.
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Gilberto
22 days ago
Surprised this is even an issue with Cisco gear!
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Santos
27 days ago
I disagree, B) debug h245 pstn might give better insights.
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Marge
1 month ago
A) debug voice h323 inout is the right command.
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Adelina
1 month ago
I recall that "debug voice sip inout" is for SIP calls, so it can't be the right answer here since we're dealing with H.323.
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Tom
1 month ago
I’m a bit confused because I thought "debug h245 pstn" was more about call signaling than audio.
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Fatima
2 months ago
I think we did a similar question where we had to identify the right debug command for H.323. I feel like "debug voice h323 inout" might be the right choice.
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Lamar
2 months ago
I remember we practiced troubleshooting H.323 issues, but I'm not sure which debug command to use for audio problems specifically.
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