Removing an Allowed SIO Screen

This procedure is used to remove an allowed signaling information octet (SIO) screen from the database using the dlt-scr-sio command. The parameters used by the dlt-scr-sio command are shown in the Gateway Screening Attributes section. The general rules that apply to configuring gateway screening entities are shown in the Gateway Screening Configuration section.

The example in this procedure removes the allowed SIO screen ls02 from the database.

The allowed SIO screen can be referenced by one of the following screens.

Screen Set
Allowed OPC
Blocked OPC

Verifying the Gateway Screening Configuration

Enter the following commands to verify that none of these screens reference the allowed SIO screen being removed from the database.

rtrv-scrset:nsfi=sio
rtrv-scr-opc:nsfi=sio
rtrv-scr-blkopc:nsfi=sio

Gateway Screening Configuration Procedures

To change the NSFI of any of these screens, perform one of these procedures.

Display the allowed SIO screens in the database using the rtrv-scr-sio command.
The following is an example of the possible output.
```
rlghncxa03w 06-10-25 15:25:30 GMT EAGLE5 36.0.0
SCREEN = ALLOWED SIO

SR    REF  RULES
IEC   YES     6
ISP1  YES     1
WRD2  YES     1
WRD4  YES     9
LS02  YES     1
TUP1  YES     2
```
From the rtrv-scr-sio output, display the allowed SIO screen you wish to remove using the rtrv-scr-sio command with the screening reference name. For this example, enter this command.

rtrv-scr-sio:sr=ls02

The following is an example of the possible output.
```
rlghncxa03w 06-10-25 15:25:30 GMT  EAGLE5 36.0.0
SCREEN = ALLOWED SIO
SR    NIC  PRI  SI  H0     H1     NSFI    NSR/ACT
LS02  2    3    3   --     --     CDPA    LS03
```
Enter the commands in the Verifying the Gateway Screening Configuration section to verify that the screen being removed is not referenced by other screens in the database.

If the screen being removed is referenced by other screens, perform the procedures shown in the Gateway Screening Configuration Procedures to change the NSFI of those screens to reference other screens or change the NSFI of these screens to STOP.
Remove the allowed SIO to the database using the dlt-scr-sio command.
The dlt-scr-sio command must be entered with these parameters: sr, nic, si, pri. The values for these parameters must be entered exactly as shown in the rtrv-scr-sio output in step 1. If the screen being removed has values for the h0 and h1 parameters, these values must be entered with the other parameter values. If the screen being removed contains dashes for the h0 and h1 parameters, the h0 and h1 parameters cannot be specified with the dlt-scr-sio command. For this example, enter this command.

dlt-scr-sio:sr=ls02:nic=2:si=3:pri=3

A message similar to the following should appear.
```
rlghncxa03w 06-10-25 15:26:30 GMT  EAGLE5 36.0.0
DLT-SCR-SIO:  SCREEN SET AFFECTED - LS02  0% FULL
DLT-SCR-SIO:  MASP A - COMPLTD
```
Verify the changes using the rtrv-scr-sio command with the screening reference name used in step 3.
For this example, enter this command.

rtrv-scr-sio:sr=ls02

The following is an example of the possible output.
```
E2573 Cmd Rej: SR or NSR does not reference an existing SR
```
This message shows that the specified screening reference name is not in the database and the action of the dlt-scr-sio command in step 3 was successful. If the specified screening reference name contained more than one entry when the dlt-scr-sio command was executed in step 3, the rtrv-scr-sio:sr= command output would show the remaining entries in the screening reference instead of error message E2573.

Backup the new changes using the chg-db:action=backup:dest=fixed command.

The following messages should appear, the active Maintenance and Administration Subsystem Processor (MASP) appears first.

BACKUP (FIXED) : MASP A - Backup starts on active MASP.
BACKUP (FIXED) : MASP A - Backup on active MASP to fixed disk complete.
BACKUP (FIXED) : MASP A - Backup starts on standby MASP.
BACKUP (FIXED) : MASP A - Backup on standby MASP to fixed disk complete.

Figure 10-8 Remove an Allowed SIO Screen