> CSCF Signalling Compression Configuration Mode Commands
> The CSCF Signalling Compression Configuration Mode is used to set memory allocation parameters in support of SIP signalling compression. More information regarding signalling compression refer to the IETF RFC 3320 “Signaling Compression (SigComp)”.
> Important: The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).
> compression-mode
> Configures the dynamic compression mode to be used while sending a SigComp message. Simple dynamic mode is the default.
> Product
> SCM
> Privilege
> Administrator
> Syntax
> compression-mode { multiple-dynamic | simple-dynamic | static | update-dynamic }
> default compression-mode
> multiple-dynamic | simple-dynamic | static | update-dynamic
> Default: simple-dynamic
> multiple-dynamic: A maximum of four dynamic states will be created per compartment. The dynamic states are updated for each message by deleting the oldest dynamic state and creating the new one. The dynamic states will be updated in FIFO (First In, First Out) order.
> simple-dynamic: Only one dynamic state will be created per compartment. The same state will be used for compression.
> static: No dynamic states will be created. Only static dictionary will be used for compression.
> update-dynamic: Only one dynamic state will be created per compartment, but the dynamic state will be updated for every new message.
> default compression-mode
> Returns the dynamic compression mode to simple dynamic.
> Usage
> Use this command to configure the dynamic compression mode to be used.
> Example
> The following command sets the compression mode to multiple dynamic:
> compression-mode multiple-dynamic
> The following command completely disables the creation of dynamic states for compression:
> compression-mode static
> decompression-memory-size
> Sets the amount of memory available for decompressing one SigComp message. A portion of the allocated memory is used to buffer the message before it is decompressed. The memory is allocated for each SigComp message and is reclaimed once decompression is completed.
> Product
> SCM
> Privilege
> Administrator
> Syntax
> decompression-memory-size { 128k | 16k | 32k | 64k | 8k }
> default decompression-memory-size
> 128k | 16k | 32k | 64k | 8k
> Default: 8k
> Specifies the amount of memory (in kilobytes) to allocate for decompressing one SigComp message.
> default
> Returns the command to the default settings.
> Usage
> Use this command to set the memory size used to decompress a single SigComp message.
> Example
> The following command sets the memory size for decompressing SigComp messages to 16k:
> decompression-memory-size 16k
> end
> Exits the current mode and returns to the Exec Mode.
> Product
> All
> Privilege
> Administrator
> Syntax
> end
> Usage
> Change the mode back to the Exec mode.
> exit
> Exits the current mode and returns to the previous mode.
> Product
> All
> Privilege
> Administrator
> Syntax
> exit
> Usage
> Return to the previous mode.
> state-memory-size
> Sets the memory allocated to a compartment for the creation of state. Compartments are application-specific groupings of messages that relate to a peer endpoint. The system allocates memory per compartment. The memory is reclaimed when the system determines that the compartment is no longer required.
> Product
> SCM
> Privilege
> Administrator
> Syntax
> state-memory-size { 4k | 8k }
> default state-memory-size
> 4k | 8k
> Default: 4k
> Specifies the amount of memory to allocate to a compartment for the creation of state.
> default
> Returns the command to the default settings.
> Usage
> Use this command to specify a memory size allocated to message groupings for the creation of state.
> Example
> The following command sets the state memory size to 8k:
> state-memory-size 8k

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