Empty or no SMS using SMPP - TRB500

Hello,

I’m using the latest Firmware for the TRB500.

Sending an SMS via the webpage of the TRB500 is working fine (Telkom Germany & Vodafone Germany). But sending an SMS via SMPP I get no SMS if sending to the Telekom Germany and sending to Vodafone Germany I get an empty SMS.

Protocol of the TRB500 (Numbers are changed with —):
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: client_accept(206) Client connection accepted
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: PDU Commmand 0x00000002
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: BIND_TRANSMITTER request
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: User: BIND Rx from (Version 34)
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] client_accept(206) Client connection accepted
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] PDU Commmand 0x00000002
Wed May 15 17:40:06 2024 daemon.info smppd[17360]:
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] BIND_TRANSMITTER request
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] User: BIND Rx from (Version 34)
Wed May 15 17:40:06 2024 daemon.info smppd[17360]:
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: PDU Commmand 0x00000004
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: SUBMIT request
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] PDU Commmand 0x00000004
Wed May 15 17:40:06 2024 daemon.info smppd[17360]:
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] SUBMIT request
Wed May 15 17:40:06 2024 daemon.info gsmd[1742]: SMS was sent to: +49162-------
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: PDU Commmand 0x00000006
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: UNBIND request
Wed May 15 17:40:06 2024 daemon.debug /usr/sbin/smppd: Closing client connection ‘3’
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] PDU Commmand 0x00000006
Wed May 15 17:40:06 2024 daemon.info smppd[17360]:
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] UNBIND request
Wed May 15 17:40:06 2024 daemon.info smppd[17360]: [Debug ] Closing client connection ‘3’
Wed May 15 17:40:06 2024 kern.info kernel: Sent 1 PDUs to +49162-------

Trace Data (Numbers are changed with --):
[15.05.2024 17:40:06:025]
00000000 00 00 00 21 00 00 00 02 00 00 00 00 00 00 00 01 …!..
00000010 55 73 65 72 00 50 61 73 73 00 63 70 00 34 00 00 User.Pass.cp.4…
00000020 00 .

[15.05.2024 17:40:06:041]
00000000 00 00 00 11 80 00 00 02 00 00 00 00 00 00 00 01 …€…
00000010 00 .

[15.05.2024 17:40:06:041]
00000000 00 00 00 43 00 00 00 04 00 00 00 00 00 00 00 02 …C…
00000010 00 00 00 2B 34 39 31 36 32 – – – – – – – …+49162-------
00000020 00 00 00 2B 34 39 31 36 32 – – – – – – – …+49162-------
00000030 00 00 00 03 00 00 00 00 08 00 08 00 74 00 65 00 …t.e.
00000040 73 00 74 s.t

[15.05.2024 17:40:06:448]
00000000 00 00 00 15 80 00 00 04 00 00 00 00 00 00 00 02 …€…
00000010 E8 A6 98 BE 00 覘¾.

[15.05.2024 17:40:06:448]
00000000 00 00 00 10 00 00 00 06 00 00 00 00 00 00 00 03 …

[15.05.2024 17:40:06:448]
00000000 00 00 00 10 80 00 00 06 00 00 00 00 00 00 00 03 …€…

The message that should be send is:
test

What could be the problem?

Thank you in advance

Best regards
Jens