ISUP Local Signaling Destination

The ISUP Local Signaling Destination object is a child of the ISUP Local Signaling Destinations object.

The ISUP Local Signaling Destination object contains configuration parameters and status information for the ISUP signaling stack associated with a local signaling point in the MetaSwitch NE. In general you will create an ISUP Local Signaling Destination object corresponding to each Signaling Gateway.

To create and start the ISUP Local Signaling Destination, you need to do the following:


You cannot delete an ISUP Local Signaling Destination or change its Signaling Gateway field if it has one or more child Proxied ISUP Circuit Groups. You will need to delete these child objects before you can delete or change the parent object.


Parameter

Access

Description
Signaling Gateway Change Inactive The Signaling Gateway on the NE to which this ISUP Local Signaling Destination corresponds. Select from the drop-down list of Signaling Gateways that are not already associated with an ISUP Local Signaling Destination.
Pass on message Change Inactive Specifies whether a message which was not fully understood should be forwarded. Values:
  • True (default)
  • False
Congestion status Read only Congestion level of the exchange. Values:
  • Level 1
  • Level 2
  • Level 3
  • Uncongested
Suppress echo cancellation requests Change Inactive Specifies whether echo control device indicator in outgoing IAMs and received ACM, CPG and ANM messages is to be suppressed. This option is used to avoid unnecessary usage of echo cancellation resources in the network and to force MetaSwitch to do any cancellation of echo from the called party required for calls routed out over ISUP trunks. It also forces MetaSwitch to provide echo cancellation for the incoming side of the call. The only circumstances under which this field should be set to True are as follows.
  • MetaSwitch has been identified as requesting too many echo control devices from the network (notably for local and/or regional calls where the network may not be provisioned to have these).
  • The echo control devices in the network are not canceling echo well enough, resulting in MetaSwitch subscribers hearing echo from the called party.
Values:
  • True
  • False (default)
Send UPT messages when restart ends Change Inactive Specifies whether the NE should send a User Part Test message to each active peer when the MTP3 Restart procedure ends. Values:
  • True (default)
  • False
T1 / TREL timer duration Change Duration in milliseconds of T1 short release timer. This timer is run after sending a Release message while awaiting a Release Complete. On expiry, ISUP retransmits the Release message. Range: 15 - 60 seconds. The default is 30 seconds.
T2 timer duration Change Duration in milliseconds of T2 suspend user timer. This timer is run on receiving a Suspend message, awaiting a Resume. On expiry, ISUP releases the call. The only valid value for this field is 3 minutes.
T3 timer duration Change Duration in milliseconds of T3 overload timer. This timer is run on receiving an overload message. On expiry, ISUP releases the call. The only valid value for this field is 2 minutes.
T4 timer duration Change Duration in milliseconds of T4 remote user unavailable timer. This timer is run on receiving an MTP_STATUS message with cause Inaccessible Remote User, awaiting User Part Available message or any other ISUP message. On expiry, ISUP polls the remote user with a User Part Test message. Range: 5 - 15 minutes. The default is 10 minutes.
T5 / TREL,l timer duration Change Duration in milliseconds of T5 long release timer. This timer is run on sending a Release message while awaiting a Release Complete, after the short release timer (T1) has expired. Range: 5 - 15 minutes. The default is 10 minutes.
T6 / TSUS,r timer duration Change Duration in milliseconds of T6 suspend network timer. This timer is run on receiving a Suspend message, awaiting called party disconnect, Resume or Release message. Range: 60 - 120 seconds. The default is 90 seconds.
T7 / TIAM timer duration Change Duration in milliseconds of T7 address complete timer. This timer is run on sending an Initial Address, while awaiting an Address Complete, Answer or Release message. Range: 20 - 30 seconds. The default is 25 seconds.
T8 timer duration Change Duration in milliseconds of T8 continuity timer. This timer is run on receipt of an Initial Address Message indicating previous or incoming continuity check, while awaiting Continuity message. Range: 10 - 15 seconds. The default is 12 seconds.
T9 timer duration Change Duration in milliseconds of T9 answer timer. This timer is run on receiving Address Complete message, awaiting Answer message. Range: 90 - 180 seconds. The default is 120 seconds.
T10 timer duration Change Duration in milliseconds of T10 address complete timer. This timer is run when the last digit is received in interworking situations, awaiting fresh information. Range: 4 - 6 seconds. The default is 5 seconds.
T11 timer duration Change Duration in milliseconds of T11 interworking address complete send timer. This timer is run when the latest address message is received in interworking situations. On expiry, ISUP sends an Address Complete message. Range: 15 - 20 seconds. The default is 18 seconds.
T12 / TBLO (blocking) timer duration Change Duration in milliseconds of T12 short blocking timer. This timer is run on sending a Blocking message, while awaiting Blocking Ack. Range: 15 - 60 seconds. The default is 30 seconds.
T13 / TBLO,l (blocking) timer duration Change Duration in milliseconds of T13 long blocking timer. This timer is run on sending a Blocking message, while awaiting Blocking Ack, after short blocking timer has expired. Range: 5 - 15 minutes. The default is 10 minutes.
T14 / TBLO (unblocking) timer duration Change Duration in milliseconds of T14 short unblocking timer. This timer is run on sending an Unblocking message, while awaiting Unblocking Ack message. Range: 15 - 60 seconds. The default is 30 seconds.
T15 / TBLO,l (unblocking) timer duration Change Duration in milliseconds of T15 long unblocking timer. This timer is run on sending an Unblocking message, while awaiting Unblocking Ack message, after the short unblocking timer has expired. Range: 5 - 15 minutes. The default is 10 minutes.
T16 / TRSC timer duration Change Duration in milliseconds of T16 short reset timer. This timer is run on sending a Reset message, while awaiting Release Complete. Range: 15 - 60 seconds. The default is 30 seconds.
T17 / TRSC,l timer duration Change Duration in milliseconds of T17 long reset timer. This timer is run on sending a Reset message, while awaiting Release Complete, after short reset timer has expired. Range: 5 - 15 minutes. The default is 10 minutes.
T18 / TCGB (blocking) timer duration Change Duration in milliseconds of T18 short group blocking timer. This timer is run on sending a Circuit Group Blocking, pending CGB Ack message. Range: 15 - 60 seconds. The default is 30 seconds.
T19 / TCGB,l (blocking) timer duration Change Duration in milliseconds of T19 long group blocking timer. This timer is run on sending a Circuit Group Blocking, pending CGB Ack, after short group blocking timer has expired. Range: 5 - 15 minutes. The default is 10 minutes.
T20 / TCGB (unblocking) timer duration Change Duration in milliseconds of T20 short group unblocking timer. This timer is run on sending a Circuit Group Unblocking, pending CGU Ack message. Range: 15 - 60 seconds. The default is 30 seconds.
T21 / TCGB,l (unblocking) timer duration Change Duration in milliseconds of T21 long group unblocking timer. This timer is called TCGBU. It is run on sending a Circuit Group Unblocking, awaiting CGU Ack, after the short group unblocking timer has expired. Range: 5 - 15 minutes. The default is 10 minutes.
T22 / TGRS timer duration Change Duration in milliseconds of T22 short group reset timer. This timer is run on sending a Group Reset message, awaiting Group Reset Ack. Range: 15 - 60 seconds. The default is 30 seconds.
T23 / TGRS,l timer duration Change Duration in milliseconds of T23 long group reset timer. This timer is run on sending a Group Reset message, awaiting Group Reset Ack, after short group reset timer has expired. Range: 5 - 15 minutes. The default is 10 minutes.
T25 timer duration Change Duration in milliseconds of T25 initial continuity check failure timer. This timer is run when initial continuity check failure is detected. On expiry, ISUP sends a Continuity Check Request message and repeats continuity check. Range: 1 - 10 seconds. The default is 5 seconds.
T26 timer duration Change Duration in milliseconds of T26 continuity recheck failure timer. This timer is run when a second or subsequent continuity check failure is detected. On expiry, ISUP sends a Continuity Check Request and repeats continuity check. Range: 1 - 3 minutes. The default is 2 minutes.
T27 / TCOT,l timer duration Change Duration in milliseconds of T27 continuity check failed received timer. This timer is run on receiving a second Continuity (failed) message, while awaiting receipt of Continuity Check Request. The only allowed value for this field is 4 minutes.
T28 / TCQM timer duration Change Duration in milliseconds of T28 await circuit query response timer. This timer is run on sending a Circuit Query Message, while awaiting a Circuit Query Response. The only allowed value for this field is 10 seconds.
T29 timer duration Change Duration in milliseconds of T29 short new congestion indication received timer. This timer is run when a congestion indication is received. On expiry, the new congestion level is taken into account by ISUP. Range: 300 - 600 milliseconds. The default is 500 milliseconds.
T30 timer duration Change Duration in milliseconds of T30 long new congestion indication received timer. This timer is started when a congestion indication is received and T29 is not running. On expiry, ISUP restores traffic by one step if not yet at full load, and restarts timer T30. Range: 5 - 10 seconds. The default is 8 seconds.
T33 timer duration Change Duration in milliseconds of T33, Await information timer. This timer is run on sending an Information Request message, awaiting Information. Range: 5 - 15 seconds. The default is 12 seconds.
T35 timer duration Change Duration in milliseconds of T35 address protection timer. This timer is run on receipt of the latest digit, awaiting final digit or ST indication. On expiry, the call is released. Range: 15 - 20 seconds. The default is 18 seconds.
T38 timer duration Change Duration in milliseconds of T38 international suspend network timer. This timer is run on receipt of a Suspend message on an international exchange, awaiting Resume. Range: 120 - 180 seconds. The default is 150 seconds.
Segmentation timer duration Change Duration in milliseconds of Await Segmentation timer. This is T34 as defined in Q764 or T36 as defined in T.113.4. This timer is run when indication of a segmented message is message is received, awaiting the segmentation message. Range: 2000 - 4000. The default is 3000.
Transit timer duration Change Duration in milliseconds of Transit / international timer. This is T36 as defined in Q764, or T34 as defined in T.113.4. This timer is run when a transit or incoming international exchange receives a Continuity Check Request message, awaiting Continuity or Release. Range: 10000 - 15000. The default is 12000.
Auto congestion timer duration Change Duration in milliseconds of Auto Congestion Timer as defined in Q.764 and GR-317. This timer is run when a Release containing a congestion indication is received. The default is 5 seconds.
DPC long duration timer duration Change Duration in milliseconds of DPC long duration timer. The default is 300000.
Userpart inaccessibility timer duration Change Duration in milliseconds of Userpart Inaccessibility Timer. The default is 30000.
Userpart long duration timer duration Change Duration in milliseconds of Userpart long duration timer. The default is 300000.
Maximum reset retries Change Maximum number of retries allowed for a reset request if the timer expires. The default is 13.
Maximum blocking retries Change Maximum number of retries allowed for a blocking request if the timer expires. The default is 13.
Maximum unblocking retries Change Maximum number of retries allowed for an unblocking request if the timer expires. The default is 13.
Deactivation mode Change Specifies how child objects should be deactivated when deactivating this object. Values:
  • Normal (default)
    Shut down child objects normally before deactivating the object.
  • Quiesce
    Deactivating the ISUP Local Signaling Destination object in quiesce mode will wait for all existing child objects using the object to be completed before deactivation. No new child objects using this object will be accepted during this deactivation period.
  • Abort
    Deactivate the object and all its child objects immediately. (This may result in errors at remote systems.)
Alarm state Read only Specifies whether any alarms are currently raised for this object. Values:
  • Clear
    No alarms are currently raised.
  • Attention Required
    Attention Required - the object is not operating normally, and needs operator intervention.
  • Attend To Dependent
    Attention Required elsewhere - another object on which this object depends is not operating normally.
Alarm log correlator 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 the Attention Required alarm events field 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 state changed timestamp Read only The time at which the Attention Required alarm events was last reset to zero.
Alarm events reset timestamp Read only The time at which the alarm count was last reset to zero.
Child Attention Required alarms Read only The total number of child objects of this ISUP Local Signaling Destination (and their own child objects) 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 child objects of this ISUP Local Signaling Destination (and their own child objects) 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:
  • Clear
    No alarms are currently raised.
  • Attention Required
    Attention Required - one or more child objects are not operating normally, and need operator intervention.
  • Attend To Dependent
    Attention Required elsewhere - another object on which one or more child objects depend is not operating normally.
Requested status Read only Specifies whether an administrator has attempted to activate the ISUP Local Signaling Destination. Values:
  • Active
    The object has been activated.
  • Inactive
    The object has not been activated or has been deactivated.
  • Disabled
    The object has been disabled.
Actual status Read only Specifies the current status of the ISUP Local Signaling Destination. Values:
  • Active
    The object is active.
  • Activating
    Activation is in progress.
  • Deactivating
    Deactivation is in progress.
  • Inactive
    The object is inactive.
  • Disabled
    The object has been disabled.
  • Activation Failed
    The object is inactive because an activation attempt has failed.
  • Failed
    The object was active but has failed.
  • Quiescing
    The object is preparing for normal deactivation. It is operating normally but will not accept any new users.
  • Waiting For Parent
    The object cannot be used because its parent object is not yet active.
  • Parent Failed
    The object cannot be used because its parent object has failed.