Deutsche Telekom Tiptel 274 1082688 User Manual

Appendix 

71 

Problem 

Possible cause 

Remedy/Recommendation 

No automatic call-back on 
busy 

Call back code not entered, 
network operator or PABX 
does not support the function 
or function is not authorised. 

Enter call back code. 
Check with network operator 
or PABX as to whether 
function is supported or needs 
to be authorised. 

Can not set up call forwarding  Call forwarding settings are 

missing or incorrect. 
Network operator or PABX 
does not support the function 
or function is not authorised. 

Make, check and if nec. 
change settings. Check with 
network operator or PABX as 
to whether function is 
supported or needs to be 
authorised. 

No call number displayed 
when a call is received 

Network operator or PABX 
does not support the function 
or function is not authorised. 
The caller has suppressed his 
call number or has a secret 
number. 
The call comes from a public 
telephone. 
The call is made via a 
telephone network that does 
not support transferring call 
numbers. 

Check with network operator 
or PABX as to whether 
function is supported or needs 
to be authorised. 

During SMS transfer you see 
the error message 
"Transmission error, please try 
again later" 
 

Wrong message centre phone 
number. With some providers 
it is necessary to add an 
additional 0 (zero) at the end 
of the phone number. 

Verify once again the message 
centre's phone number and 
eventually add one additional 0 
(zero) at the end. 

SMS transmission works fine, 
but reception does not work. 

Maybe there are two terminal 
units configured for SMS at the 
same telephone line. 

Make sure that only one of the 
terminal units is configured for 
SMS. Delete the SMS center's 
phone number to deactivate 
the SMS function.