Exam 300-815 All Questions

View all questions & answers for the 300-815 exam

Exam 300-815 topic 1 question 10 discussion

Actual exam question from Cisco's 300-815

Question #: 10
Topic #: 1

Cisco SIP IP telephony is implemented on two floors of your company. Afterward, users report intermittent voice issues in calls established between floors. All calls are established, and sometimes they work well, but sometimes there is one-way audio or no audio. You determine that there is a firewall between the floors, and the administrator reports that it is allowing SIP signaling and UDP ports from 20000 to 22000 bidirectionally. What are two possible solutions? (Choose two.)

A. Go to the SIP profile assigned to these IP phones in Cisco Unified CM and change the range of media ports to 16384-32767
B. Ask the firewall administrator to change the ports to TCP.
C. Ask the firewall administrator to change the range of UDP ports to 16384-32767.
D. Go to the SIP profile assigned to these IP phones in Cisco Unified CM and change the range of media ports to 20000-22000.
E. Go to System Parameters in Cisco Unified Communications Manager and change the range of media ports to 20000-22000.

Show Suggested Answer

Suggested Answer: AC 🗳️
Reference:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/port/9_1_1/CUCM_BK_T2CA6EDE_00_tcp-port-usage-guide-91/
CUCM_BK_T2CA6EDE_00_tcp-port-usage-guide-91_chapter_01.html

by thili at Sept. 4, 2020, 9:46 a.m.

Comments

Submit Cancel

thili

Highly Voted 4 years, 8 months ago

Answer is C,D

upvoted 16 times

...

Mert_kerna

Highly Voted 2 years, 12 months ago

This question is tricky because it's asking for two separate solutions. The wording suggests that it's not looking for two tasks to become one single solution. In this case, one solution is to change the ports on the SIP profile of the phones to match the ports on the firewall. The other solution is to ask the firewall admin to change his ports to match the ports in UCM.

upvoted 7 times

RC31

2 years, 3 months ago

I agree, you either change CUCM to match the firewall or change the firewall to match CUCM. C and D

upvoted 3 times

...

b3532e4

Most Recent 7 months ago

Both FW and sip profiles must have the same port, so A and C is the correct answer If we need an answer, just D is fine

upvoted 1 times

...

729edae

1 year ago

C and D are the answers. Mert,kerna is correct, they are looking for a single solution. Either change the FW or change the SIP Profile.

upvoted 1 times

...

john_doe_9999

1 year, 4 months ago

Selected Answer: CD

C and D

upvoted 1 times

...

Afaik

1 year, 9 months ago

Selected Answer: CD

If you change the ports on the CUCM for the devices to use different ones they need to match the ones that can be used on the firewall so A) is wrong and D) is correct.

upvoted 1 times

...

7ArchAngel7

2 years ago

C and D...why are there so many wrong on this site?

upvoted 1 times

7ArchAngel7

2 years ago

16384 - 32767 is default cisco use of ephemeral

upvoted 1 times

...

AgshinA

4 years, 1 month ago

It is correct, A and C. Both must be 16384 - 32767. No need to configure 16384 - 32767 in the firewall but 20000 - 22000 in CM. They should be the same.

upvoted 1 times

XalaGyan

4 years, 1 month ago

if the firewall admin has permitted only udp 20000 until 22000, how can changing something on cucm affect that? C and D are correct.

upvoted 7 times

...

Exam 300-815 All Questions

View all questions & answers for the 300-815 exam

Exam 300-815 topic 1 question 10 discussion

Comments

thili

Mert_kerna

RC31

b3532e4

729edae

john_doe_9999

Afaik

7ArchAngel7

7ArchAngel7

AgshinA

XalaGyan

SY0-701