FlowSpec Mapping

The FlowSpec Mapping object specifies parameters that control how bandwidth is reserved for voice over cable calls using a particular codec and packetization interval. These parameters are defined in the PacketCable specification.

The delivered configuration includes a standard set of mappings as defined in the PacketCable specification. You will not normally need to change these or add new ones except as instructed by your CMTS supplier or by MetaSwitch support personnel.

The FlowSpec Mapping object is a child of the Cable FlowSpec Mappings object.


Parameter

Access

Description
Description Change A text string used in the EMS System Explorer to identify this FlowSpec Mapping. Specify a string of up to 64 characters.
Type Change Inactive The type of codec to which this FlowSpec mapping applies. Values:
  • Static
  • Dynamic
  • T.38
If you define two or more FlowSpec Mappings with a type of T.38, only one of these can be enabled at any time.
RTP/AVP code Change Inactive This field appears only if Type is set to Static. Numeric identifier for the static codec in use. Range: 0 - 95. If you define two or more FlowSpec Mappings with the same combination of RTP/AVP code and Packetization interval, only one of these can be enabled at any time.
RTPMap Change Inactive This field appears only if Type is set to Dynamic. A unique text string (maximum 32 characters) identifying the dynamic codec in use. If you define two or more FlowSpec Mappings with the same combination of RTPMap and Packetization interval, only one of these can be enabled at any time.
Packetization interval Change Inactive This field does not appear if Type is set to T.38. Specifies the interval in milliseconds at which data using this FlowSpec is divided into packets. The packetization interval used for communications with a CMTS is defined in the Remote Media Gateway Model used by the corresponding Subscriber Gateway. You will need a FlowSpec Mapping for each combination of packetization interval and codec that you will use.
FlowSpec parameters b, m, M Change Byte count used for the parameters b, m and M (bucket depth, min policed unit, and maximum datagram size) as defined in the PacketCable specification. (These parameters are always set to the same value.)
FlowSpec parameters r, p Change Bytes per second used for the parameters r and p (bucket rate and peak rate) as defined in the PacketCable specification. (These parameters are always set to the same value.)
Requested status Read only Specifies whether an administrator has attempted to activate the FlowSpec Mapping. Values:
  • Enabled
    The object has been enabled.
  • Disabled
    The object has been disabled.
Actual status Read only Specifies the current status of the FlowSpec Mapping. Values:
  • Enabled
    The object is enabled.
  • Disabled
    The object is disabled.