Disable the video services

You can disable or hide all video settings for the phone to disable the video capability of the phone.

If you disable the video services, the user can't see any video in calls or meetings on the phone. The user can still see the self-view and adjust the camera exposure on the phone screen. The video-related settings are invisible on the Voice > User tab in the phone web page.

1

On the phone web page, select Admin Login > Advanced > Voice > Phone.

2

Under Supplementary Services section, from the Video Serv list, select Yes to enable video services or No to disable the service.

3

Click Submit All Changes to save your settings.

Control the video bandwidth

If you have a busy network or have limited network resources, users may complain about video issues; for example, the video may lag or suddenly stop.

By default, the phone automatically selects a bandwidth setting that balances the audio and video network requirements.

You can configure a fixed bandwidth setting to override the automatic selection, if required for your network conditions. If you configure a fixed bandwidth, select a setting and adjust downwards until there is no video lag.

1

Access the phone administration web page.

2

Select Voice > Phone.

3

In the Video Configuration section, choose a bandwidth from the Bandwidth Allowance parameter to restrict the maximum amount of information that the phone can transmit or receive. For more information.

Options: Auto

  • Auto
  • 2 Mbps
  • 1 Mbps
  • 750 Kbps
  • 500 Kbps
  • 250 Kbps

Default: Auto

You can also configure this parameter in the configuration file (cfg.xml) by entering a string in this format:

<Bandwidth_Allowance ua="na">Auto</Bandwidth_Allowance>
4

Click Submit All Changes.

Adjust camera exposure

You can adjust camera exposure for the ambient light in your office. Adjust the exposure to change the brightness of the transmitted video. The user can adjust camera exposure on the phone.

Before you begin

The video services (Video Serv) are enabled on the Voice > Phone tab.

1

Access the phone administration web page.

2

Select Voice > User.

3

In the Video Configuration section, enter a value in the Camera Exposure field.

The exposure range is 0 to 15, and the default value is 8.

4

Click Submit All Changes.

Video transmit resolution setup

Cisco Video Phone 8875 supports the following video formats:

  • 1080p (1920x1080)

  • 720p (1280x720)

  • 600p (1024x600)–Default

  • WVGA (800x480)

  • VGA (640x480)

  • 360p (640x360)

  • CIF (352x288)

  • 240p (432x240)

  • SIF (352x240)

  • QCIF (176x144)

The phone negotiate the best bandwidth and resolution based on the phone configuration and phone screen limitations.

The following table shows the resolutions, frames per second, and video bit rate range for each of the supported video types.

Table 1. Supported video types

Video type

Video resolution

Frames per second (fps)

Video bit rate range

1080p1920 x 1080303500–4000 kbps
1080p1920 x 1080152667–4000 kbps

720p

1280 x 720

30

2040–3750 kbps

720p

1280 x 720

15

1185–3750 kbps

600p1024 x 600301584–3000 kbps
600p1024 x 60015840–3000 kbps

WVGA

800 x 480

30

990–1500 kbps

WVGA

800 x 480

15

525–1500 kbps

VGA

640 x 480

30

520–1500 kbps

VGA

640 x 480

15

280–1500 kbps

360p

640 x 360

30

600–1350 kbps

360p

640 x 360

15

315–1350 kbps

240p

432 x 240

30

270–525 kbps

240p

432 x 240

15

96–525 kbps

CIF

352 x 288

30

200–350 kbps

CIF

352 x 288

15

120–350 kbps

SIF

352 x 240

30

200–350 kbps

SIF

352 x 240

15

120–350 kbps

QCIF

176 x 144

30

94–350 kbps

QCIF

176 x 144

15

64–350 kbps

QCIF

176 x 1441517–350 kbps
Configure the video codec

Video codecs enable compression or decompression of digital video. You can enable or disable video codecs from the phone web page.

For all codecs, the Real Time Protocol (RTP) payload type is dynamic and you can configure it on the phone web page from Admin Login > Advanced > Voice > SIP > SDP Payloads Type.

You can also configure the parameters in the phone configuration file with XML(cfg.xml) code. To configure each parameter, see the syntax of the string in the following table of Video codec parameters.

1

On the phone web page, select Admin Login > Advanced > Voice > Ext(n).

2

In the Video Configuration section, set up the fields as described in the following table of Video codec parameters.

3

Click Submit All Changes.

Video codec parameters

The following table defines the function and usage of the video codec parameters in the Video Configuration section under the Voice > Ext (n) tab in the phone web interface. It also defines the syntax of the string that is added in the phone configuration file (cfg.xml) with XML code to configure a parameter.

Table 2. Video codec parameters

Parameter

Description

H264 BP0 Enable

Enables the H264 Base Profile 0 codec when you select Yes and disables it when you select No.

Perform one of the following:

  • In the phone configuration file with XML(cfg.xml), enter a string in this format:

    <H264_BP0_Enable_1_ ua="na">Yes</H264_BP0_Enable_1_>

  • In the phone web interface, set this field to Yes or No to enable or disable the H264 BP0 codec.

Allowed values: Yes|No

Default: Yes

H264 BP1 Enable

Enables the H264 Base Profile 1 codec when you select Yes and disables it when you select No.

Perform one of the following:

  • In the phone configuration file with XML(cfg.xml), enter a string in this format:

    <H264_BP1_Enable_1_ ua="na">Yes</H264_BP1_Enable_1_>

  • In the phone web interface, set this field to Yes or No to enable or disable the H264 BP1 codec.

Allowed values: Yes|No

Default: Yes

H264 HP Enable

Enables the H264 High Profile codec when you select Yes and disables it when you select No.

Perform one of the following:

  • In the phone configuration file with XML(cfg.xml), enter a string in this format:

    <H264_HP_Enable_1_ ua="na">Yes</H264_HP_Enable_1_>

  • In the phone web interface, set this field to Yes or No to enable or disable the H264 HP codec.

Allowed values: Yes|No

Default: Yes

Encryption Method

Encryption method to be used during secured call.

Perform one of the following:

  • In the phone configuration file with XML(cfg.xml), enter a string in this format:

    <Viedo_Encryption_Method_1_ ua="na">AES 128</Viedo_Encryption_Method_1_>

  • In the phone web interface, select your preferred encryption method from the list.

Allowed values: AES 128|AES 256 GCM

Default: AES 128