Dynamic TCH Timer

[RF Engr]

In ZTE Equipment when a dynamic TCH is converted to on demand PDCH and then it become IDLE state then how long BSS will wait to convert it back to CS resources in ZTE?
In E******* there is one Time PILTIMER but i want to know same parameter in zte.
When an on-demand PDCH becomes idle it is placed in idle list for the packet switched domain and parameter PILTIMER is started. When the parameter PILTIMER expires for a PDCH the channel is returned to circuit switched domain. When an on-demand PDCH becomes idle it is placed in idle list for the packet switched domain and parameter PILTIMER is started. When the parameter PILTIMER expires for a PDCH the channel is returned to circuit switched domain.

Thanks in advance.