SMS is Non Circuit Related Service.
Only processed through C7 Signalling Between GSM Nodes.
Route to SMS-IWMSC will be Used for this they uses a special DEVICE TYPE = MSMO.
Check in your ERICSSON Manuals.
Print this Command.
EXROP:DETY=MSMO;
In the Printout there will be a BO=XX.
ANBSP:B=XX;
In this Origin only Barring is Dine if needed and charging case will be attached.
Thats it.