DECT NR+ simultaneous FT and PT mode for 3.3.0 preview modem.

[Yosh]

Hello,

I currently have a DECT NR+ setup running on an nRF9151 based on the newer HELLO DECT sample, using v3.3.0 preview version of the modem. With these comes two files, dect_net_l2_mgmt.h and dect_net_l2.h, providing an interface to the DECT NR+ stack. However, I was wondering if the current version of the preview support devices running both FT and PT mode, like the documentation states should be possible?

I try to write to the device type bitmap dect_device_type_t in dect_settings, and this works fine if the value is either 0x01 (FT) or 0x02 (PT), but not 0x03 (FT | PT):
<err> dect_mdm: Settings write validation failed, failure bitmap: 0x0004

Thanks, Gustav

[Syed Maysum Abbas Zaidi]

Hi,

The dect_device_type_t field accepts DECT_DEVICE_TYPE_FT (0x01) or DECT_DEVICE_TYPE_PT (0x02). The failure bitmap 0x0004 in the error message corresponds to DECT_SETTINGS_WRITE_SCOPE_DEVICE_TYPE, confirming that the value 0x03 is being rejected at settings validation.

Whether combined FT+PT operation is intended to be supported through this field in the current preview firmware is something we need to verify internally. We will follow up shorty after confirmation.

Best Regards
Syed Maysum

[Yosh]

Thanks for the answer, I understand this is a preview and decisions and implementations are not final. However, is there a way to run devices in FTPT mode regardless?

[Syed Maysum Abbas Zaidi]

Hi Yosh,

The current preview firmware supports FT and PT as operational modes and FTPT mode is not yet supported. I have raised this internally and will update you very soon. Thanks

Best Regards,
Syed Maysum

[Yosh]

Hi Syed, thanks for the answer. I now understand that FTPT is not supported/possible. I just wondered if you have gotten any additional information internally on this issue?

Regards, Gustav

[Syed Maysum Abbas Zaidi]

Hi Yosh,

We got a confirmation that PTFT device type is not supported. Do let us know if you have any further related question. Thanks.

Best Regards,
Syed Maysum

[Yosh]

Hi again Syed,

I marked this as an answer since I now know that FTPT is not supported. However, I want to follow up with one question: Is FTPT operation in the works or planned for the future?

Regards, Yosh