If you are adding support for this feature to a pre-existing configuration, then you must select the specific configuration instance, using the ACLI select command.
ORACLE(codec-policy)# select 1
You can now configure forced ptime.
force-ptime—Set this parameter to enabled to enable forced ptime for this codec policy.
packetization-time—Enter the ptime in ms to use in the realm where this codec policy is active. Valid values are 10, 20, 30, 40, 50, 60, 70, 80, 90 ms. The default value is 20 ms.