QoS should be configured on Cisco VCS because it processes the media and the call signaling. The endpoints that register to Cisco VCS (such as the Cisco TelePresence System EX Series, C Series, and Cisco IP Video Phone E20) should be configured so that media uses which Layer 3 DSCP packet value?
A. AF41 (34)
B. EF (46)
C. CS4 (32)
D. CS3 (24)
“QoS should be configured on the Cisco TelePresence Video Communication Server (VCS) because it processes the media and the call signaling. The endpoints that register to the VCS (such as the Cisco TelePresence System EX Series, C Series, Cisco IP Video Phone E20, or others) should be configured so that the call signaling uses DSCP CS3 and the media from those endpoints is marked as DSCP AF41.”
Question asked what should the media be…
Answer is: A
For video general AF41 would bne correct.
But all listet devices are Telepresence Devices (Tandberg). Telpresence is marked with CS4.
That’s why Answer D is maybe the correct one.
I agree with the answer A.
As per the leading practice, voice calls should be marked as EF (default) and video calls (both audio and video streams) are “marked AF41” (default). Signaling traffic is marked as CS3 or AF31.
I now agree with the answer C.
QoS should be configured on the Cisco TelePresence Video Communication Server (VCS) because it processes the media and the call signaling. The endpoints that register to the VCS (such as the Cisco TelePresence System EX Series, C Series, Cisco IP Video Phone E20, or others) should be configured so that the call signaling uses DSCP CS3 and the media from those endpoints is marked as DSCP AF41.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/uc_system/design/guides/videodg/vidguide/qos.html
From the Cisco Video and TelePresence Architecture Design Guide:
“QoS should be configured on the Cisco TelePresence Video Communication Server (VCS) because it processes the media and the call signaling. The endpoints that register to the VCS (such as the Cisco TelePresence System EX Series, C Series, Cisco IP Video Phone E20, or others) should be configured so that the call signaling uses DSCP CS3 and the media from those endpoints is marked as DSCP AF41”
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/uc_system/design/guides/videodg/vidguide/qos.html
Looks like the answer is actually: A. AF41 (34)
The correct answer is CS4 32 as since CUCM 9.x Cisco changed the QoS model. the problem with these questions is that you cant tell if they are asking about older versions of CUCM or current settings.
See here: https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-video/212134-Video-Quality-of-Service-QOS-Tutorial.html#anc19
By default, prior to version 9.0 CUCM (Cisco Unified Call Manager) marked any and all video traffic (including TelePresence) to AF41. Starting from version 9.0, CUCM preconfigures the following DSCP values:
TelePresence (immersive video) calls at CS4 and
Video (IP video telephony) calls at AF41
I agree because the question refers to VCS not to CUCM, so the answer is AF41.
The question refers to VCS not to CUCM, so the answer is AF41.
Agree with flimsy
voice media as DSCP 46 or PHB EF; desktop video media as DSCP 34 or PHB AF41; telepresence video media as DSCP 32 or PHB CS4; call signaling as DSCP 24 or PHB CS3), and therefore these devices can be trusted. In the case of personal desktop video endpoints, including the Cisco Unified IP Phone 8900 and 9900 Series and Cisco DX Series devices, both voice and video media packets are marked as DSCP 34 or PHB AF41 to preserve lip synchronization during a video call.
Answer should be C