The SCCP object is a child of the SS7 Signaling object.
The SCCP object contains all of the configuration that is used to allow the TCAP applications to exchange information. There is only a single SCCP object, which is created before delivery of MetaSwitch NE and which you cannot destroy.
Parameter |
Access |
Description |
SCCP name | Change | The name of the SCCP family. |
Remote Concerned Area to notify of events | Change | Select the appropriate Remote Concerned Area object, or select None. |
Initial SST message timer | Change | This is the initial value of the SST Message Timer. This timer is started when the NE first sends a subsystem-status test (SST) message to a remote SP. If the timer pops before a response is received, the NE starts the timer again using the larger value Maximum SST message timer. This use of two timers allows the NE to send out a couple of test messages quickly, and then move to a more occasional test message. The NE sends a SST periodically to a remote subsystem if it is reported as inactive, until it is reported as active. It is reported as active by a subsystem-available (SSA) message. Range: 5 - 10. The default is 8. |
Maximum SST message timer | Change | Maximum value of the SST Message Timer. This timer is run after an initial subsystem status test times out. It is longer than the initial timer. Range: 600 - 1200. The default is 600. |
Initial SCLC reassembly timer | Change | Initial value of the SCLC reassembly timer. The NE starts this timer when it begins a reassembly, and stops it when the reassembly ends. If the timer expires and the reassembly is not complete, the NE cancels the reassembly and discards the partial message. The NE also uses this timer for segmentations, and cancels any segmentation if it is not able to acquire a buffer in this period. Range: 10 - 20. The default is 10. |
SCLC SSN congestion timer | Change | Initial value of the SCLC SSN congestion timer. If a local application is congested for this period of time, then SCCP removes the application from service until the congestion clears. Range: 1000 - 5000. The default is 2000. |
Segmentation in octets - lower limit | Change | Lower limit for segmentation in octets. If the length of user data is less than this, then the NE does not attempt to segment the message. This value must not be greater than Segmentation in octets - upper limit. Do not change this value without a good knowledge of the SS7 network. Setting a value that is too high will cause MTP3 to discard messages, while setting a value that is too low can cause excessive segmentation, leading to increased network load. Range: 160 - 254. The default is 170. |
Segmentation in octets - upper limit | Change | Upper limit for segmentation in octets. If the length of user data is greater than this, then the NE segments the message. If the length is less than this but not less than Segmentation in octets - lower limit, then the NE may segment the message. This value must not be less than Segmentation in octets - lower limit. Be careful when changing this value. Setting a value which does not match the specifics of the SS7 network could cause messages to be lost, or network load to be increased. Range: 160 - 254. The default is 220. |
Maximum user data size accepted from TCAP | Read only | The maximum user data size which the NE will accept from TCAP. This value is not configurable. Value: 3952 bytes. |
Maximum single message data length support for MTP3 | Read only | The maximum data length supported on a single message. The default is 272. |
Deactivation mode | Change | Specifies how child objects should be deactivated when deactivating this object. Values:
|
Alarm state | Read only | Specifies whether any alarms are currently raised for this object. Values:
|
Alarm log correlator - Attention Required | Read only | Identifier of the log message for the event that caused the last Attention Required alarm state for this object. This field is reset when Attention Required alarm events is reset to zero. |
Attention Required alarm events | Read only / Reset | Number of times (since the alarm count was reset) that this object's alarm state has gone to Attention Required. |
Alarm log correlator - Attend To Dependent | Read only | Identifier of the log message for the event that caused the last Attend To Dependent alarm state for this object. This field is reset when the Attend To Dependent alarm events field is reset to zero. |
Attend To Dependent alarm events | Read only / Reset | Number of times (since this field was reset) that this object's alarm state has gone to Attend To Dependent. |
Alarm state changed timestamp | Read only | The time at which the Alarm state last changed. |
Alarm events reset timestamp | Read only | The time at which the Attention Required alarm events was last reset to zero. |
Child Attention Required alarms | Read only | The total number of child objects of this object that are in Attention Required state. |
Child Attention Required alarm events | Read only / Reset | The total number of times that the alarm state for a child object has gone to Attention Required. |
Child Attend To Dependent alarms | Read only | The total number of children of this object that are in Attend To Dependent state. |
Child Attend To Dependent alarm events | Read only / Reset | The total number of times that the alarm state for a child object has gone to Attend To Dependent. |
Summary child alarm state | Read only | Summarizes the alarm status for all children of this object. Values:
|
Requested status | Read only | Specifies whether an administrator has attempted to activate the SCCP. Values:
|
Actual status | Read only | Specifies the current status of the SCCP. Values:
|