Configure Network Quality Settings

You can specify how your system responds to network quality issues by controlling how your network handles packets during video calls.

Procedure

  1. In the system web interface, go to Network > Primary Network > Network Quality.
  2. Configure the following settings:
    Setting Description
    Quality Preference

    Specifies which video stream has precedence when attempting to compensate for network loss:

    • Both people and content streams
    • People streams
    • Content streams

    The stream option you select experiences less quality degradation during network loss compensation than the other. Choosing Both means each stream experiences roughly equal degradation.

    This setting is not available if you enable Automatically Adjust People/Content Bandwidth.

    Type of Service

    Specifies the type of service (ToS), which lets you prioritize packets sent to your system for video, audio, Far End Camera Control (FECC), and OA&M:

    • IP Precedence: Represents a priority level between 0 and 7.
    • DiffServ: Represents a priority level between 0 and 63.
    Video

    Specifies the IP Precedence or DiffServ priority level for video RTP and associated RTCP traffic.

    Audio

    Specifies the IP Precedence or DiffServ priority level for audio RTP and associated RTCP traffic.

    Control

    Specifies the IP Precedence or Diffserv priority level for control traffic on the following channels:

    • H.323: H.225.0 Call Signaling, H.225.0 RAS, H.245, and FECC
    • SIP: SIP Signaling, FECC, and Binary Floor Control Protocol (BFCP)

    (The system enables FECC by Allow Other Participants in a Call to Control Your Camera.)

    OAM

    Specifies the IP Precedence or Diffserv value for traffic unrelated to video, audio, or FECC.

    Maximum Transmission Unit Size

    Specifies whether to use the default Maximum Transmission Unit (MTU) size for IP calls or let you select it.

    Maximum Transmission Unit Size Bytes
    Specifies the MTU size (in bytes) used in calls.
    • If video quality is poor or you experience network errors, packets might be too large. Decrease the MTU.
    • If the network is burdened with unnecessary overhead, packets might be too small. Increase the MTU.
    Enable Lost Packet Recovery If you enable this setting, the system uses the Lost Packet Recovery (LPR) protocol to help compensate for packet loss if it occurs.
    Enable RSVP If you enable this setting, the system can use the Resource Reservation Setup Protocol (RSVP) to request that routers reserve bandwidth along an IP connection path. (To use this feature, the near and far site must support RSVP.)
    Dynamic Bandwidth Enable this setting if you want the system to automatically determine the optimal call rate.
    Maximum Transmit Bandwidth Specifies the maximum transmit call rate between 64 kbps and the system’s maximum line rate.

    Use this setting when the system connects to the network using an access method with different transmit and receive bandwidths.

    Maximum Receive Bandwidth Specifies the maximum receive call rate between 64 kbps and the system’s maximum line rate.

    Use this setting when the system connects to the network using an access method with different transmit and receive bandwidths.

  3. Select Save.