ITU-T V.25bis Dialing Commands and Responses
F-33980-A2-GB30-40 October 1998
Program Normal (PRN)
The Program Normal (PRN) command allows the DTE
to enter and store a telephone number to a specific
directory location. PRN is similar to the AT&Z command.
The PRN command format is:
PRNx;n
Where: x is the directory location 1–10.
n is the telephone number.
Request List of StoredNumbers (RLN)
The Request List of Stored Numbers (RLN) command
displays telephone numbers stored in the modem’s
directory location. If the RLN command is entered
without specifying a directory location, then all directory
locations and telephone numbers are displayed. If a
directory location is entered, then only that telephone
number are displayed.
The RLN command format is:
RLN
which displays all directory locations,
or
RLNx
Where: x is a directory location.
List Stored Number Response (LSN)
LSN is a response to an RLN command issued by the
DTE. If a directory location is specified, then the
telephone number for that location is displayed. If no
directory location is specified, then all telephone numbers
stored in memory are displayed.
The LSN response format is:
LSNx;n
Where: x is the directory location.
n is the telephone number.
Command Response
A Command Response indicates that the command
entered was a valid or invalid entry. Command Response
includes Valid (V AL) and Invalid (INV).

Valid (VAL)

The VAL response indicates that the modem has
accepted the V.25bis command issued by the DTE. VAL is
similar to the AT result code OK.

Invalid (INV)

The INV response indicates that the modem has
received an incorrect V.25bis command from the DTE.
INV is similar to the AT result code ERROR.
The INV response format is:
INVxx
Where: xx is
CU command unknown
MS message syntax error
PS parameter syntax error
PV parameter value error
Table F-1 lists V.25bis commands supported by
3800Plus modems.
Table F-2 lists V.25bis response messages supported by
3800Plus modems.