Call barrier

Possible only if bypass of the service code is switched off.
Check code (S):
S=33 all outgoing transmissions
S=331 outgoing abroad
S=332 outgoing abroad except home
S=35 all arriving transmissions
S=351 all arriving abroad

Special check codes (s) delete:
Switch off only in connection with the procedure
S=330 check code status outgoing & arriving transmissions switch off
S=333 check code status outgoing transmissions switch off
S=353 check code status arriving transmissions switch off   
Service code (D):
Not all nets support all services
D=10 language and fax (all calls)
D=11 only language
D=12 all data (speed/minutes)
D=13 only fax
D=14 DATEX j (active?)
D=15 teletex (active?)
D=16 only SMS
D=18 all data except SMS
D=19 all services except SMS
D=20 all services
D=21 all asynchronous services
D=22 all synchronous services
D=23 3.1 kHz GSM of language services
D=24 all synchronous POINT ton of POINT DATA inclusive. PADs
D=25 only data (all asynchronous POINT ton of POINT DATA inclusive. PADs)
D=26 data packet exchange links incl. PADs
D=27 services thru PADs
D=29 12 Kbps digital link