Normally, \*(xt uses the X.121 address in the 
.L address
parameter of the link configuration file.
If you specify a value for 
.L local_x121 , 
\*(xt uses this value instead of the 
.L address 
value in a Call Request.
If this parameter is used, the address specified must be in
\fIexactly\fP the form required for the calling address field in a
Call Request packet.
(If you use \fLlocal_x121\fP, \*(xt does not use the \fLcalling_address_opt\fP
and \fLaddress_prefix\fP parameters in processing the calling address.)
