ISUP Media Channel

Each ISUP Media Channel object is a child of an ISUP Remote Signaling Destination object.

This object contains configuration parameters and status information for an ISUP Media Channel. A Media Channel is defined for a set of Circuit Groups with the same local exchange and the same remote exchange and typically the same quality of service. A media channel is uniquely identified by the local and remote exchanges and a media channel index.

Each media channel maintains a list of the associated circuit groups, each referenced by the CIC of the base circuit. Each associated circuit group references its associated media channel using the media channel index.

Routes are defined using Media Channels rather than individual circuit groups because it generates simpler routing tables.

There is no need to define an ISUP Media Channel for a one-way incoming trunk; it is required only for two-way or one-way outgoing trunks.

For initial configuration of an ISUP Media Channel, you need to do the following:


Parameter

Access

Description
Media channel index Create Local index identifying the media channel. This index is referenced by the Circuit Groups which are associated with the media channel.
Description Change A text string used in the EMS System Explorer to identify the media channel. Specify a string of up to 64 characters.
Local trunk group number Change inactive The Trunk Group ID of the Media Channel. The primary use for this field is for billing records. When a call is set up using a circuit on this trunk group, the billing record output will indicate the trunk group's number.
Allocation policy Change Inactive Specifies the circuit allocation policy to be used by the local exchange for allocating circuits within the media channel. (This should be different from the value used at the remote destination.) Values:
  • Top down (default)
    Allocate the available circuit with the highest CIC.
  • Bottom up
    Allocate the available circuit with the lowest CIC.
  • Most idle
    Allocate the circuit that has been idle for the longest time.
  • Least idle
    Allocate the circuit that has been idle for the shortest time.
  • Most idle / least idle
    Allocate the "most idle" circuit controlled by the local exchange (control is defined by the Dual seizure policy field). If no circuit controlled by the local exchange is available, allocate the "least idle" circuit not controlled by the local exchange.
Guard timer duration Change Inactive Duration, in ms, of the guard timer. The default is 750ms.
Dual seizure policy Change Inactive Policy used to determine the dual seizure controlling exchange for circuits within this media channel. (This should be different from the value used at the remote destination.) Values:
  • This exchange (default)
  • Remote exchange
  • High point code: even CIC
    The exchange with the higher point code has control of the circuits with even CICs, and the exchange with the lower point code has control of the circuits with odd CICs.
Echo cancellation Change inactive Echo cancellation requirements for this Media Channel. Echo cancellation can be set up either on a specific Media Channel (for example to use echo cancellation on a media channel that represents a satellite link), or in number validation (for example to use echo cancellation on all international calls). Values:
  • Required
  • Preferred
  • None (default)
% utilization Read only Percentage utilization of the media channel; the number of allocated circuits as a percentage of the total number of circuits in the media channel.
Record incoming CDRs Change Specifies whether to make billing records (known as Incoming Call Detail Records) for transit calls on this Media Channel. Values:
  • True
  • False (default)
Record outgoing CDRs Change Specifies whether to make billing records (known as Outgoing Call Detail Records) for transit calls on this Media Channel. Values:
  • True
  • False (default)
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 - 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.
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 the alarm count 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.
Requested status Read only Specifies whether an administrator has attempted to activate the ISUP Media Channel. 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 Media Channel. 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.