Exam 350-801 topic 1 question 92 discussion

The correct answer is A. The codec used cannot exceed 60k. G.722 has the ability to use 48, 56, and 64k.

The Maximum Audio Bit Rate is still applied for calls within a region and between regions; but rather that using the highest audio quality codec (as in earlier Unified CM releases) based on the maximum bit rate setting, the codec selection is made based on the codec order in the audio codec preference list and the codecs that the endpoints support. In these condictions, the correct answer is A. Please refer to: "Cisco Collaboration System 12.x Solution Reference Network Designs SRND", in section "Codec Selection over SIP Trunks"

G.722 با سرعت 48 kbps G.711 u-law با سرعت 64 kbps G.729 با سرعت 8 kbps G.711 A-law با سرعت 56 kbps

G.729 call uses 24 kb/s.

Based on the information provided in the image, if a call is placed between two endpoints in Region1, the audio codec that will be selected is G.711u. This means that the answer is D. In the image, we can see that the Region1 to Region1 relationship has a maximum audio bit rate of 64 kbps. This means that the codec selected for a call between two endpoints in Region1 must have a bit rate of 64 kbps or lower. G.711u and G.711a both have bit rates of 64 kbps, while G.722 and G.729 have higher bit rates and would not be selected. Since G.711u is listed first in the list of codecs supported by both endpoints, it will be selected over G.711a.

I believe A is best answer here. Order in preference list is factored in the choice. Also checks supported codecs, then the max bit rate. G722 and G711 alaw would both be selected since they are both supported and they are lower than the max audio bit rate then g722 is taken as the best since its higher in the preference list.

In the picture from the drop-down list (Codecs in List*) it is indicated that the codec is 722 use 48k.

The answer is B https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmsys/CUCM_BK_SE5FCFB6_00_cucm-system-guide-100/CUCM_BK_SE5FCFB6_00_cucm-system-guide-100_chapter_01000.html#CUCM_RF_B90D5F7F_00 Bandwidth Calculations In performing location bandwidth calculations for purposes of call admission control, Cisco Unified Communications Manager assumes that each call stream consumes the following amount of bandwidth: G.711 call uses 80 kb/s. G.722 call uses 80 kb/s. G.723 call uses 24 kb/s. G.728 call uses 26.66 kb/s. G.729 call uses 24 kb/s. GSM call uses 29 kb/s. Wideband call uses 272 kb/s. iLBC call uses 24 kb/s. AMR call uses 12.2 kb/s. AMR-WB call uses 23.85 kb/s. AAC call uses value that video mline specifies.

C - according to Preference list G711A is 56k that is the 'best' codec below 60k allowed.

On second thought,, yeah didn't notice the 48k G722 on the ACPL. So yeah A is the correct one

I think answer should be B. Since Intra-region max bandwidth is capped at 60kbps, G722 and G711 are not valid.