The ISDN PRI DS0 object describes a DS0 connection that runs over an ISDN PRI DS1 line.
This object is created automatically when you create or modify its parent ISDN PRI DS1 (there is an ISDN PRI DS0 for each available timeslot on the parent ISDN PRI DS1), and you cannot create or delete it. There are no configurable parameters, but the object provides status information about the DS0.
Each ISDN PRI DS0 object is a child of an ISDN PRI DS1object.
Parameter
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Access
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Description
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Timeslot
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Read only
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The timeslot on the ISDN PRI DS1 that this DS0 uses.
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Channel type
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Read only
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The type of channel for which this DS0 is being used. Values:
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In call
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Read only
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Indicates whether this DS0 is being used by an active call. This parameter is visible only if Channel type is set to B-channel. Values:
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Bearer capability
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Read only
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Indicates the bearer capability being used by the active call, if any. This parameter is visible only if Channel type is set to B-channel. Values:
- Unknown
- Speech
- 3.1kHz audio
- 64kbps data
- 64kbps restricted
- 56kbps data
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Media state
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Read only
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State of the TDM termination associated with this DS0. Possible values:
- Unknown
The media state is unknown because the TDM termination associated with it is not operational.
- Unavailable
The media is unavailable, typically because the TDM termination has been deactivated.
- Inactive
The media is inactive, typically because of a physical connectivity problem.
- Active
The media is available and active.
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Signaling state
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Read only
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Indicates the state of the D-channel, if any, using this DS0. This parameter is visible only if Channel type is set to D-channel. Values:
- Unknown
- Inactive (media down)
- Inactive (signaling failure)
- Active
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Maintenance state
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Read only
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Indicates the state of the B-channel, if any, using this DS0. This parameter is visible only if Channel type is set to B-channel. The channel can be used for calls only if its status is Available. Values:
- Unavailable
The media associated with this channel is not active. See the Media state parameter for more details.
- Out of service (MetaSwitch)
The NE has put the channel in an Out of Service state. This is a transient state immediately after the interface is activated, and clears automatically when the associated D-channel becomes active.
- Out of service (peer device)
The peer device has put the channel in an Out of Service state. This is usually due to management action.
- Maintenance (peer device)
The peer device has put the channel in a Maintenance state, indicating that it is available for restricted use (such as testing). This is usually due to management action.
- Restarting
ISDN restart processing is in progress. This occurs normally on interface activation, on recovery from D-channel failure, or after certain protocol errors. This state clears automatically when restart processing is complete.
- Restart failed
Restart processing has failed, and will be retried automatically when the restart timer expires. This state indicates that the peer ISDN equipment is failing to respond to ISDN messages from the NE.
- Available
The channel is available for calls, or is in a call.
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