Changing an Allowed SIO Screen

This procedure is used to change the attributes of an allowed signaling information octet (SIO) screen in the database using the chg-scr-sio command. The parameters used by the chg-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 change the allowed SIO screen ls02 to an nic of 2, an si of 14, and an nsfi is stop.

The allowed SIO screen can reference one of the following screens.

• Allowed DPC
• Blocked DPC
• Allowed Affected Destination Field
• Allowed ISUP
• Allowed CGPA
• Allowed CDPA

Verifying the Gateway Screening Configuration

Enter the following commands to verify that these screens are in the database.

• rtrv-scr-dpc:all=yes
• rtrv-scr-blkdpc:all=yes
• rtrv-scr-destfld:all=yes
• rtrv-scr-isup:all=yes
• rtrv-scr-cgpa:all=yes
• rtrv-scr-cdpa:all=yes

Gateway Screening Configuration Procedures

If the desired screen is not in the database, perform one of these procedures to add the desired screen to the database or change an existing screen in the database.

• Adding an Allowed DPC Screen
• Adding a Blocked DPC Screen
• Adding an Allowed Affected Destination Field Screen
• Adding an Allowed ISUP Message Type Screen
• Adding an Allowed Calling Party Address Screen
• Adding an Allowed Called Party Address Screen
• Changing an Allowed DPC Screen
• Changing a Blocked DPC Screen
• Changing an Allowed Affected Destination Field Screen
• Changing an Allowed ISUP Message Type Screen
• Changing an Allowed Calling Party Address Screen
• Changing an Allowed Called Party Address Screen

The new values for the network indicator code, service indicator, priority, and heading codes being changed in the allowed SIO screen cannot be in that screen.

Specifying a Range of Values

A range of values can be specified for the pri, h0, and h1 parameters. If a range of values is specified for any of these parameters and the nic and si values in the screening reference name are not changed, the range of values for the pri, h0, or h1 parameters cannot include any values that are currently provisioned for the screening reference name.

For example, screening reference name scr1 contains these entries:

SR    NIC  PRI  SI  H0     H1     NSFI    NSR/ACT
SCR1  2    3    1    4      5     DPC     LS03
SCR1  2    2    1    2      7     BLKDPC  LS04

Another entry for screening reference scr1 with the same nic and si values cannot be specified if:

• The range of values for the pri parameter includes the values 2 or 3
• The range of values for the h0 parameter includes the values 2 or 4
• The range of values for the h1 parameter includes the values 5 or 7.

Changing H0 and H1 Values

The h0 and h1 values must be specified if the si value is 0, 1, or 2. If the si value is 3 through 15, the h0 and h1 parameters cannot be specified.

The nh0 and nh1 values must be specified if the nsi value is 0, 1, or 2. If the nsi value is 3 through 15, the nh0 and nh1 parameters cannot be specified.

The h0 and h1 parameters must be specified if either parameter is specified.

The nh0 and nh1 parameters must be specified if either parameter is specified.

The H0 and H1 heading code values can be a single value, a range of values with the beginning and end of the range separated by double ampersands (for example, a range of values from 2 to 9, 2&&9), or with an asterisk (*). The asterisk specifies all possible values for the h0 and h1 parameters. Table 10-4 shows the valid combinations of these parameter values.

Table 10-4 Valid Value Combinations for H0 and H1 Parameters

H0	H1
Single Value	Single Value
Single Value	Range of Values
Single Value	Asterisk
Range of Values	Asterisk
Asterisk	Asterisk

1. 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 change 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

   If a gateway screening stop action set is to be assigned to the allowed SIO screen being changed in the database, go to step 2.

   Step 2 verifies the gateway screening stop action set names in the database. The gateway screening stop action set names are assigned only if the NSFI of the screen being changed in this procedure is STOP. If the NSFI of the screen will be changed to STOP, but a gateway screening stop action set name will not be assigned to the screen, skip steps 2 and 3 and go to step 4. If the NSFI of the screen will not be STOP, skip step 2 and go to step 3.

2. Display the gateway screening stop action sets in the database with the rtrv-gws-actset command.

   This is an example of the possible output.

   rlghncxa03w 06-10-25 15:26:30 GMT EAGLE5 36.0.0
   ACT  ACT    ACT  ACT  ACT  ACT  ACT  ACT  ACT  ACT  ACT  ACT
   ID   NAME   1    2    3    4    5    6    7    8    9    10
   --   ------ ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
   1    copy   copy      
   2    rdct   rdct      
   3    cr     copy rdct 
   4    cncf   cncf      
   5    cpcncf copy cncf 
   6    cncfrd cncf rdct 
   7    cpcfrd copy cncf rdct
   
   GWS action set table is (7 of 16) 44% full

   If the required gateway screening stop action set is not in the database, perform the Configuring Gateway Screening Stop Action Sets procedure to configure the required gateway screening stop action set.

   Note:

   If theNSFI of the screen being changed in this procedure will be STOP, or if the NSFI of the screen is not being changed, skip step 3 and go to step 4.
3. Enter the commands in the Verifying the Gateway Screening Configuration section to verify that the screen that will be specified by the NSFI/NSR parameter combination in step 4 is in the database.

   If the desired screen is not in the database, perform one of the procedures shown in the Gateway Screening Configuration Procedures section to add the desired screen to the database or change an existing screen in the database.

4. Change the attributes of an allowed SIO screen using the chg-scr-sio command.

   If a gateway screening stop action is to be assigned to the allowed SIO screen being changed, enter the chg-scr-sio command with the nsfi=stop parameter and the actname parameter with the name of a gateway screening stop action set shown in the output of the rtrv-gws-actset command executed in step 2.

   Caution:

   Redirecting SLTA/SLTM messages prevents SLTA/SLTM messages from being returned to the EAGLE. The signaling link carrying these messages will fail if these messages are not returned to the EAGLE. To prevent SLTA/SLTM messages from being redirected, gateway screening stop action sets containing the redirect stop action should not be assigned to Allowed SIO screens containing the service indicator values 1 (SI=1) or 2 (SI=2).

   The current values for the nic, si, pri, h0 and h1 parameters must be entered in the chg-scr-sio command exactly as shown in the rtrv-scr-sio output in step 1.

   The following list contains the values for nnic, nsi, npri, nh0 and nh1 parameters:

   • nnic – 0 - 3, or an asterisk (*)
   • nsi – 0 - 15
   • npri – 0 - 3, or an asterisk (*)
   • nh0 – 0 - 15, or an asterisk (*)
   • nh1 – 0 - 15, or an asterisk (*)

   A range of values can be specified for the npri, nh0, and nh1 parameters. See the Specifying a Range of Values section for more information. See the Changing H0 and H1 Values section for information on how the asterisk and a range of values are used for the nh0 and nh1 parameters.

   The value of the nsfi parameter is based on the value of the service indicator (si) parameter. Table 10-1 shows the valid combinations of nsfi values and service indicator values.

   For this example, enter this command.

   chg-scr-sio:sr=ls02:nic=2:si=3:pri=3:nsi=14:nsfi=stop

   A message similar to the following should appear.

   rlghncxa03w 06-10-25 15:27:30 GMT  EAGLE5 36.0.0
   CHG-SCR-SIO:  SCREEN SET AFFECTED - LS02  1% FULL
   CHG-SCR-SIO:  MASP A - COMPLTD

5. Verify the changes using the rtrv-scr-sio command with the screening reference name used in step 4.

   For this example, enter this command.

   rtrv-scr-sio:sr=ls02

   The following is an example of the possible output.

   rlghncxa03w 06-10-25 15:28:30 GMT  EAGLE5 36.0.0
   SCREEN = ALLOWED SIO
   SR    NIC  PRI  SI  H0     H1     NSFI    NSR/ACT
   LS02  2    3    14  --     --     STOP     ------

6. 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 10-9 Change an Allowed SIO Screen - Screen 1 of 3

Figure 10-10 Change an Allowed SIO Screen - Sheet 2 of 3

Figure 10-11 Change an Allowed SIO Screen - Sheet 3 of 3