Hi David,
This is something that should be checked at the CTMAN end.
The api commands that can be sent to TPS from CTMAN has the facility to set the limit of ports ( to do media ports reservation ) on TPS or not,
For example a call booked by TMS will not have this issue, as the TMS does not send any media port resevation command to the TPS
I'll check a bit more on the CTMAN side and communicate asap as I have more details
Cristian