Configuring the Client Softphone

This procedure provides an example of configuring a SIP client to call the PowerMedia WMS using Common Intermediate Format (CIF) or Quarter Common Intermediate Format (QCIF) resolutions.

Note: Before you can make SIP calls to the PowerMedia WMS, you must configure the SIP User Agent (UA) on the client softphone to use the appropriate Audio and Video codecs. The codecs must be available in the SIP UA and the PowerMedia WMS.

  1. From the Kapanga softphone, click the K icon on the upper-left corner.

sc_kapanga.png

  1. Select Configuration, Call Control Settings. The following screen appears.

sc_call_control1.png

 

The available codecs appear in the left list. The list on the right is the codecs used for SIP calls.

  1. Select one video codec and one audio at a time. Be sure to include H.264 (video). In this example, the AMR and H.264 are used. The codecs that you select must be available in the PowerMedia WMS. Refer to Verifying Licenses to find the codecs currently enabled in the target PowerMedia WMS.

  2. Select Configuration, Codec Settings. The following screen appears.

sc_codec_setting.png

  1. Select 1.2 for the Level and Profile.

  2. Select CIF for the Preferred Resolution.

  3. Click the K icon and select File, Save or Save as

  4. To enable the new configuration parameter, click the K icon and select Configuration, Restart Softphone.

  5. To test the bitrate control capabilities of the PowerMedia WMS, select Video Rate Control above and enter the bitrate that you plan to use. (The default is 384 kbps.) The SIP UA sends a “b=AS:<XXX> bandwidth limiter line in the SDP to the PowerMedia WMS. The PowerMedia WMS will use this setting for the output bitrate of the video stream to the SIP UA.

  6. Select Configure, General Settings. The following screen appears.

sc_general_settings.png

  1. Select the Miscellaneous Parameters tab to set the camera and frame rate settings. In this example, the Video rate (fps) is set to 10. The camera is enabled and the resolution is set to CIF.

  2. Click the K icon and select File, Save or Save as.

  3. To enable the new configuration parameter, click the K icon and select Configuration, Restart Softphone.

Note: If Kapanga is configured to offer only H.263/RFC2429 and H.263/RFC2190 video (in this order) in the SDP Offer, the PowerMedia WMS will answer with H263-1998 (H.263/RFC2429). The media session established between the PowerMedia WMS and Kapanga should stream H.263 (RFC2429) but the Kapanga streams H.263 (RFC2190) instead.