Sepura STP9000 doesn't show ISSI

[RMW00]

I have a Sepura STP9000 and some MTP6550 TETRA radios that I use in DMO mode.

If I transmit with the MTP6550, the Sepura shows in the Display can't show TPI (Talking party identification).
I would like to see the ISSI of the MTP6550 transmitting.

The other way around it works. The MTP6550 does show the Sepura's ISSI when I transmit with it.

I suspect that this is an option somewhere in the programming software, but I can't find it.

Can someone point me in the right direction?

Regards,

[AnRegs]

Setup DMO address extensions properly. MCC MNC for DMO.