4. H323 Configuration on the SkyEdge NMS
4.1 H323 Direct Mode Configuration
4.1.4 Configuring DA Parameters in the VSAT Data Template
Depending on the DA mechanism used in the network perform either of the following:
Configuring VoIP and Dynamic DA Parameters OR
Configuring VoIP and Legacy ADA Parameters in the VSAT Data Template 4.1.4.1 Configuring VoIP and Dynamic DA ParametersTo configure VoIP and Dynamic DA parameters in the VSAT Data template:
1. Click the Templates button.
Result: The VSAT Templates Configuration window is displayed.
Figure 18: VSAT Templates
2. In the VSAT Software column, select the relevant software version, 3. In the VSAT Remote Processes column, select Data
4. In the Template Name column, select the relevant Data template.
5. Double-click the selected template.
Result: The selected Data template configuration window is displayed.
Figure 19: VSAT Data Template
6. In the left pane of the VSAT Data configuration window click Data
ADA.Result: The ADA parameters are displayed on the right.
7. Set the ADA Operation Scheme parameter to Enhanced DA.
Result: The Enhanced (Dynamic) DA parameters are displayed.
Figure 20: Data Template Dynamic Parameters 8. In the Advanced Configuration section, set the
LAPU Tx mode while in DA parameter to Unnumbered. This parameter specifies the LAPU access mode during the VSAT ADA transmission of numbered or unnumbered traffic.
9. In the left pane of the VSAT Data Configuration window, click DataADART Applications.
Result: The RT Applications parameters are displayed.
Figure 21: VSAT Data Template – RT Applications
10. Under RT Applications, set the Max Num of Calls parameter to the maximum number of concurrent calls per VSAT (31). This numbers refers to the total number of concurrent calls per VSAT including SIP and H323.
4.1.4.2 Configuring VoIP and Legacy ADA Parameters in the VSAT Data Template
To configure VoIP and Legacy ADA parameters in the VSAT Data template:
1. Click the Templates button.
Result: The VSAT Templates Configuration window is displayed.
Figure 22: VSAT Templates
2. In the VSAT Software column, select the relevant software version, 3. In the VSAT Remote Processes column, select Data
4. In the Template Name column, select the relevant Data template.
5. Double-click the selected template.
Result: The selected Data template configuration window is displayed.
Figure 23: VSAT Data Template
6. In the left pane of the VSAT Data configuration window click Data
ADA.Result: The ADA parameters are displayed on the right.
7. Under General, set the ADA Operation Scheme parameter to Legacy ADA.
Result: The Legacy ADA parameters are displayed.
Figure 24: VSAT Data Template – Legacy ADA
The ADA Optimum Slots and ADA Minimum Slots are not applicable to the VoIP ADA trigger. The maximum number of DA slots that can be assigned to a VSAT derives from the Super Slot Size parameter defined in the VSAT Access template. If the hub cannot allocate the minimum number of DA slots, the VSAT will not switch to DA. It will remain in the RA/GA mode and will transmit a new DA request after the DA Retry Timer expires (see below).
Verify that the Fixed PDA Slots and Fixed PDA Rate parameters are set to 0.
Set the DA Retry Time parameter to 30 seconds. This parameter specifies the time (in seconds) the VSAT will wait before retransmitting a request for DA allocation after a previous request was denied by the HSP.
Verify that the ADA fairness timer is set to 0. This timer is used to set a time interval during which the HSP will allow the VSAT to transmit in DA using the original (maximum) number of allocated slots. When using VoIP, this parameter should be set to 0.9. In the Advanced Configuration section, set the
LAPU Tx mode while in DA parameter to Unnumbered. This parameter specifies the LAPU access mode during the VSAT ADA transmission of numbered or unnumbered traffic.
10. In the left pane of the VSAT Data configuration window click Data
ADA
ROT threshold.Result: The ROT threshold parameters are displayed.
11. Click the ROT tab.
Result: The Rate of Traffic parameters are displayed.
Figure 25: VSAT Data Template – ADA ROT Parameters
12. Under Operation Mode, configure the following parameters:
Ignore EF Traffic –− If the Ignore EF Traffic parameter is set to TRUE, the ROT trigger will ignore the EF class traffic (VoIP) when calculating the VSAT traffic. This will enable the use of the ROT trigger for sending more DA requests over active VoIP triggers.
− If the Ignore EF Traffic parameter is set to FALSE, the ROT Trigger will include the EF traffic (VoIP) when calculating the VSAT traffic.
The rest of the parameters on the ROT tab are not relevant to VoIP configuration.
13. Click DataADART Applications.
Result: The RT Application parameters are displayed on the right.
Figure 26: Legacy ADA - RT Applications Parameters
14. Configure the RT Applications parameters using the following guidelines:
In the Max Num of Calls field, enter the maximum number of concurrent calls per VSAT (31). This numbers refers to the total number of concurrent calls per VSAT including SIP and H323.
In the Default Data Bandwidth field, specify the bandwidth (in Kbps) that will be guaranteed to the Data applications running simultaneously with the VoIP traffic.− To support fax applications, set the Default Data Bandwidth to 30 Kbps.
− The Default Data Bandwidth is used for calculating the number of PDA slots needed for the Data applications running simultaneously with the VoIP traffic.
− When calculating the number of PDA slots for the VSAT, the required number of slots for this Data bit rate is added to the required number of slots for the active VoIP calls.
Configure the Default Data Mandatory parameter as follows:− If the Default Data Mandatory parameter is set to Yes, new VoIP calls will be allowed only if there are enough PDA slots to run the required Data bit rate simultaneously with the active VoIP calls. If there are not enough PDA slots for the Data applications, new VoIP calls will be discarded.
− If this parameter is set to No, the VSAT will try to acquire enough PDA slots to run the required Data bit rate. The new VoIP calls will be allowed even if the Data requirements are not met.
NOTE
The Default Data Bandwidth is used for calculating the number of PDA slots needed for the Data applications running simultaneously with the VoIP traffic.
When calculating the number of PDA slots for the VSAT, the required number of slots for this Data bit rate is added to the required number of slots for the active VoIP calls.