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Cisco 300-815 Exam - Topic 1 Question 119 Discussion

A user has a problem calling a specific PSTN number. An engineer investigates the issue on a Cisco UCM server and a Cisco Unified Border Element router, and discovers that the ITSP rejects the outbound SIP INVITE with a 422 Session Timer Too Small SIP message. What must the engineer do to resolve the issue?
C) Increase the Min-SE SIP header timer on the appropriate Cisco Unified Border Element dial peer.
A) Decrease the SIP Session Expires Timer service parameter in Cisco UCM.
B) Decrease the Min-SE SIP header timer on the appropriate Cisco Unified Border Element dial peer.
D) Increase the SIP Session Expires Timer service parameter in Cisco UCM.

Cisco 300-815 Exam - Topic 1 Question 119 Discussion

Actual exam question for Cisco's 300-815 exam
Question #: 119
Topic #: 1
[All 300-815 Questions]

A user has a problem calling a specific PSTN number. An engineer investigates the issue on a Cisco UCM server and a Cisco Unified Border Element router, and discovers that the ITSP rejects the outbound SIP INVITE with a 422 Session Timer Too Small SIP message. What must the engineer do to resolve the issue?

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Suggested Answer: C

by Jerry at Jan 05, 2026, 05:16 AM

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Aliza
4 months ago
D could work, but I feel like the issue is more about the current settings being too high.
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Tambra
4 months ago
C seems right. Increasing the Min-SE might align with the ITSP requirements.
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Celeste
4 months ago
I agree, but what about A? Decreasing the SIP Session Expires Timer could help too.
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Verona
5 months ago
I think it's B. Lowering the Min-SE should fix the rejection.
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Truman
5 months ago
Agreed, B is the best option here.
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My
5 months ago
No way, it has to be C! Increasing the timer won't fix the rejection.
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Cory
5 months ago
Wait, isn't it surprising that a 422 error is caused by session timers?
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Jolanda
5 months ago
I think A could work too, but B seems more direct.
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Han
5 months ago
Definitely B, you need to decrease the Min-SE timer.
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Kanisha
6 months ago
Trick question! The answer is actually to unplug the router and plug it back in. Works every time.
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Vincenza
6 months ago
Hmm, this one's a real head-scratcher. I'm going with C) just to see what happens.
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Isidra
6 months ago
B) Decrease the Min-SE SIP header timer on the appropriate Cisco Unified Border Element dial peer. Seems like the logical fix to me.
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Crista
7 months ago
D) Increase the SIP Session Expires Timer service parameter in Cisco UCM. Gotta love those Cisco solutions!
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Laquanda
7 months ago
C) Increase the Min-SE SIP header timer on the appropriate Cisco Unified Border Element dial peer. That's the way to go!
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Paris
7 months ago
I vaguely remember that the SIP Session Expires Timer in Cisco UCM affects how long the session is valid. Maybe we should look at option A or D?
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Zoila
7 months ago
If the ITSP is rejecting with a 422 error, it seems like we need to increase the timer. I feel like option D could be the right choice.
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Art
7 months ago
I think we had a similar question where we had to adjust the Min-SE timer. It might be related to option B or C, but I can't recall the exact details.
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Daniela
7 months ago
I remember something about session timers from our last practice exam, but I'm not sure if we should increase or decrease them in this case.
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Dottie
8 months ago
Yeah, I agree with Sarah. Increasing the Min-SE timer on the border element should give the ITSP the longer session timer it's looking for and resolve the issue.
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Gladis
8 months ago
Based on the error message, it seems like the ITSP is expecting a longer session timer than what's currently configured. So I'm thinking option C, increasing the Min-SE timer on the Cisco Unified Border Element, is likely the right approach.
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Lanie
8 months ago
I'm a bit confused by the different timers mentioned - the SIP Session Expires Timer and the Min-SE SIP header timer. I'll need to make sure I understand the difference between them.
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Herminia
8 months ago
Okay, the key here is understanding the 422 Session Timer Too Small error message. I think I need to focus on adjusting the timers to resolve this.
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Hyman
8 months ago
Hmm, this seems like a tricky one. I'll need to carefully review the options and think through the implications of each.
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Rashad
2 months ago
I’m leaning towards option D. Increasing the SIP Session Expires Timer could resolve the rejection.
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Maybelle
2 months ago
But what if we need to increase it instead? Option C might be the way to go.
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Roxane
4 months ago
I think option B makes sense. Lowering the Min-SE timer could help.
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