ISDN PRI DS1

The ISDN PRI DS1 object defines an individual DS1 channel that provides a T1 connection over an ISDN Primary Rate Interface.

Each ISDN PRI DS1 object is a child of an ISDN Primary Rate Interface object. If the parent ISDN Primary Rate Interface has NFAS interface set to True, you can define at most 20 ISDN PRI DS1 child objects; otherwise you can define only one ISDN PRI DS1 child object.

For initial configuration of an ISDN PRI DS1, you need to do the following.


You cannot deactivate or delete an ISDN PRI DS1 if the parent ISDN Primary Rate Interface is active and this DS1 is configured as its primary D-channel DS1 or secondary D-channel DS1.

Object-Specific Actions
Restart all B-channels This action restarts all B-channels on this DS1 (for example to clear an error condition in which some of the channels are out of sync with the peer device). This action is available only when the DS1 is active.
Restarting the B-channels will end all calls that are using this DS1. You will be prompted to confirm or cancel the action.

Parameter

Access

Description
DS1 identifier Create Identifier for this DS1 within the parent ISDN Primary Rate Interface. This parameter is used only if the parent ISDN Primary Rate Interface has NFAS interface set to True. Specify a value in the range 0 - 19, or click on the ellipsis symbol at the end of the field to select the next free value or browse through the available values.
Description Change A text string used in the EMS System Explorer to identify this ISDN PRI DS1. Specify a string of up to 64 characters.
TDM port Change Inactive The TDM port supporting this DS1. Click on the ellipsis symbol at the end of the field to select from the list of MetaSwitch Trunk / Access Gateways, and then from the list of TDM Ports on the selected gateway for which Profiles supported includes the value ISDN. Each port in the list is marked to indicate whether it supports a network-side or user-side D-channel. If the DS1 will be used for the primary or secondary network-side or user-side D-channel of its parent ISDN Primary Rate Interface, you must select a TDM Port that supports a D-channel of the appropriate type; otherwise you can select a TDM Port with no D-channel.
Excluded timeslots Change Inactive Timeslots on this DS1 that are not available for use as D-channels or B-channels. By default, all channels are available for use, but you can restrict the range of available channels (for example to provide partial T1 capacity). You cannot activate this DS1 if all of the timeslots are excluded. Select zero or more of the timeslot values 1 - 24. Timeslot 24 must not be excluded if the DS1 supports a D-channel.
Media state Read only State of the underlying TDM Port associated with this DS1. Possible values:
  • Unknown
    The media state is unknown because the TDM Port associated with it is not operational.
  • Unavailable
    The media is unavailable, typically because the TDM Port has been deactivated.
  • Inactive
    The media is inactive, typically because of a physical connectivity problem.
  • Active
    The media is available and active.
  • Quiescing
    The media is quiescing, typically because the TDM Port has been deactivated with a deactivation mode of Quiesce.
Deactivation mode Change Specifies how child objects should be deactivated when deactivating this object. Values:
  • Normal (default)
    Release all active calls normally before deactivating the object.
  • Quiesce
    Deactivating the DS1 in quiesce mode will wait for all existing calls to complete before the DS1 is deactivated. No new calls using this DS1 can be activated during this deactivation period.
  • Abort
    Deactivate the object and end all its calls immediately. (This may result in errors at remote systems.)
Network-side ISDN D-channel available Read only Specifies whether the selected TDM Port can be used for a network-side D-channel. This is the case if it is on a PB3000 adaptor and is configured using the NE CRAFT UI to support ISDN, or if it is on a PB3100, PB4000, PB4500, or PB5000 adaptor. Values:
  • True
  • False
User-side ISDN D-channel available Read only Specifies whether the selected TDM Port can be used for a user-side D-channel. This is the case if it is on a PB3000 adaptor and is configured using the NE CRAFT UI to support ISDN, or if it is on a PB3100, PB4000, PB4500, or PB5000 adaptor. Values:
  • True
  • False
ISDN D-channel in use Read only Indicates whether there is a D-channel in use on this DS1. If a D-channel is in use, you cannot deactivate the DS1 without first deactivating its parent ISDN Primary Rate Interface. Values:
  • True
  • False
B-channel restart state Read only If a restart of all B-channels on this DS1 has been requested, this field shows the status of this restart action. Values:
  • None
    No restart has been requested.
  • In progress
  • Restart failed
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 state changed timestamp Read only The time at which the Alarm state last changed.
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 the Attention Required alarm events field is reset to zero.
Additional alarm log correlator - Attention Required Read only If available, the identifier of the log message for the original 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.
Attention Required alarm events reset timestamp Read only The time at which the Attention Required alarm events was last reset to zero.
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.
Additional alarm log correlator - Attend To Dependent Read only If available, the identifier of the log message for the original 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 the alarm count was reset) that this object's alarm state has gone to Attend To Dependent.
Attend To Dependent alarm events reset timestamp Read only The time at which the Attend To Dependent alarm events was last reset to zero.
Requested status Read only Specifies whether an administrator has attempted to activate the port. 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 port. 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.