Radio Shack CT-501 User Manual
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Your phone’s selectable system registration function lets you
select one of seven possible roaming modes:
Roaming Mode Description
Display
Standard Mode — the phone first seeks a home type 
system, then it seeks a non-home type.
If you are using a type A (non-wireline) home system
Std Ab
If you are using a type B (wireline) home system
Std bA
Invert Preference Mode — the phone first seeks a 
non-home type system, then it seeks a home type. 
(Select this setting while on the fringe of your home 
area or in certain roaming situations.)
If your home system is non-wireline (type A):
•
RM
flashes rapidly — call on system B
•
RM
flashes slowly — call on home type system
•
IU
flashes slowly — call on home system
SCAnbA
If your home system is wireline (type B):
•
RM
flashes rapidly — call on system A
•
RM
flashes slowly — call on home type system
•
IU
flashes slowly — call on home system
SCAnAb
Home Only Mode — the phone will not operate out-
side your home system.
HOME
Scan A Mode — the phone will operate only within 
non-wireline (A) systems.
SCAn A
Scan B Mode — the phone will operate only within 
wireline (B) systems.
SCAn b
SID Mode — the phone automatically scans for one 
or more preferred systems to use and one or more 
systems not to use. System IDs must be prepro-
grammed by dealer; preferred system (SID) feature 
requires special service (contact your cellular car-
rier).
P SCAn
17-1110.fm Page 47 Wednesday, July 21, 1999 1:38 PM