Cisco Cisco WebEx Meeting Center WBS30 Weißbuch
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Table 16.
Comparison of Results During Presentation Sharing
Presentation Share (Slide Presentation with 5-Second Transitions)
Average (kbps)
Maximum (kbps)
PC
6.5
7.5
iPhone 3G
23
41
iPad 16 Gb
30
62
BB
54.56
55.28
Table 17 gives test results for the iPhone 4 (16 Gb) and BlackBerry Bold 9700 with a 3G Network. Table 18 shows
the amount of data consumed in one hour over 3G/4G LTE networks.
Table 17.
iPhone 4 (16G) and BlackBerry Bold 9700 with 3G Network
Idle
Average (kbps)
Maximum (kbps)
iPhone
0.17
0.28
BB
0.26
0.33
Table 18.
Data
consumed over 3G/4G LTE Networks
Data Consumed in an Hour
Audio using Internet (VoIP)
~23 MB
Video (at 90p)
~43 MB
*
ViewcContent (flip PDF page rapidly)
~250 MB
Total per hour
~316 MB
*
Bandwidth consumption will increase if the SuperAdmin setting “frame rate increase” is enabled.
Common Problems and Location of Log Files
Factors affecting the video quality include:
●
WebEx site, host, and meeting settings. For example, a video setting set by the administrator or host for a
specific meeting may not allow HQ video at the 360p resolution.
●
PC capabilities. For example, a non-dual core with insufficient memory cannot process the 360p video
resolution and you will experience lower-quality video (both encode and decode).
●
Camera capabilities. For example, certain cameras can compensate for the low-light environment, some
have auto-focus, and others work in HD and require more CPU power.
●
In-room lighting or backlight background.
●
Measured bit rate. Not enough bandwidth available for the client PC automatically reduces the video quality
and frame rate from 720p to 360p to 180p resolution or disables the video.
●
Video mode and display size. A 180p receiving resolution will not achieve the same video quality
experience in the full-screen (HQ) or expanded full-screen (HD) video mode as the 360p or 720p resolution.
The displayed video size is what you will see in the theater mode. Depending on the resolution of the monitor used,
the displayed video can be scaled up and enlarged to fit the monitor screen. This video size is independent of the
resolution of the incoming video source.