Specifications
Setting Video Parameters
Restrictions for Setting Video Parameters
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Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
• Perform basic Cisco Unified SRST configuration. For more information, see Cisco Unified SRST
V4.0: Setting Up the Network.
• Perform basic ephone configuration. For more information, see Cisco Unified SRST V4.0: Setting
Up Cisco Unified IP Phones.
Restrictions for Setting Video Parameters
• This feature supports only the following video codecs:
–
H.261
–
H.263
• This feature supports only the following video formats:
–
Common Intermediate Format (CIF)—Resolution 352x288
–
One-Quarter Common Intermediate Format (QCIF)—Resolution 176x144
–
Sub QIF (SQCIF)—Resolution 128x96
–
4CIF—Resolution 704x576
–
16CIF—Resolution 1408x1152
• The call start fast feature is not supported with an H.323 video connection. You must configure
call start slow for H.323 video.
• Video capabilities are configured per ephone, not per line.
• All call feature controls (for example, mute and hold) apply to both audio and video calls, if
applicable.
• This feature does not support the following:
–
Dynamic addition of video capability—The video capability must be present before the call
setup starts to allow the video connection.
–
T-120 data connection between two SCCP endpoints
–
Video security
–
Far-end camera control (FECC) for SCCP endpoints
–
Video codec renegotiation—The negotiated video codec must match or the call falls back to
audio-only. The negotiated codec for the existing call can be used for a new call.
–
Video codec transcoding
• When a video-capable endpoint connects to an audio-only endpoint, the call falls back to audio-only.
During audio-only calls, video messages are skipped.
Information About Setting Video Parameters
This feature allows you to set video parameters for the Cisco Unified SRST to maintain close feature
parity with Cisco Unified CallManager. When the Cisco Unified SRST is enabled, Cisco Unified IP
phones do not have to be reconfigured for video capabilities because all ephones retain the same
configuration used with Cisco Unified CallManager. However, you must enter call-manager-fallback
configuration mode to set video parameters for Cisco Unified SRST. The feature set for video is the same
as that for Cisco Unified SRST audio calls.