IAD

The IAD object defines an Integrated Access Device connected to the VP3000.

Each IAD object is a child of the IADs object. Because there may be a large number of IAD objects, the EMS System Explorer displays them in groups underneath the IADs object. Expand the groups to display the range of IAD objects within them. Note that as IAD objects are created and deleted, the allocation of IADs to groups may change.

To configure and use an IAD, you need to do the following:

The fields prefixed by (*) are present only if the parent IAD supports a LES EOC channel and are read from the IAD. Note that these fields are not dynamically updated; to refresh the information displayed by these fields, click on the Refresh pushbutton. You should not expect these fields to be updated immediately upon clicking on this pushbutton; a request is sent to the IAD and the fields are updated when the information is returned from the IAD.

Actions
Create Enable Activate
Delete Disable Deactivate
Apply Reset Statistics Refresh
Object-Specific Actions
Refresh To refresh the information read from the IAD, click on the Refresh pushbutton. This pushbutton is visible only if the IAD supports a LES EOC channel.
Reconfigure To reconfigure the IAD to the default configuration, click on the Reconfigure pushbutton.
Warm restart To perform a warm restart on the IAD, click on the Warm restart pushbutton. This pushbutton is visible only if the IAD supports a LES EOC channel. This pushbutton is not active when the requested status is Inactive.
Cold restart To perform a cold restart on the IAD, click on the Cold restart pushbutton. This pushbutton is visible only if the IAD supports a LES EOC channel. This pushbutton is not active when the requested status is Inactive.
OAM loopback To perform an OAM loopback test on the IAD, click on the OAM loopback pushbutton. This pushbutton is active only when the requested status is Active.

Parameter

Access

Description
IAD name Change Inactive A unique name used in the EMS User Interface to identify this IAD. You must specify a name of 1 - 16 characters, which may be uppercase letters, digits, or any of the following special characters:
+
- _ & ! ' | = # ? . ; [ ] ^ ' { } ~
Number of voice ports to configure Change Inactive Number of voice ports to be configured on this IAD. This is not necessarily the same as the number of voice ports supported on the IAD. If the number of voice ports supported on the IAD is less than this value, the voice ports that cannot be supported are alarmed. During creation, when this field is set, the system automatically creates the configured number of IAD Voice Port objects, which exist until the IAD Port is destroyed. If this field is later modified, the system creates or deletes IAD Voice Port objects correspondingly.
Maximum concurrent calls allowed (all types) Change Inactive Maximum number of calls that can be in progress at any one time on the IAD. This value allows you to restrict the amount of bandwidth used on the VCC to the IAD, on the assumption that not all voice ports on the IAD will need to be in use at the same time. This count includes both ADPCM (G.726) and PCM (G.711) calls. For the purposes of this count, if a tone (such as the reorder tone) is being played to a subscriber outside of a call, the subscriber is viewed as being in a call for the duration of the tone. If a call setup attempt is made to or from the IAD after this count has been reached, the call setup attempt will be rejected. This value cannot exceed the value of Number of voice ports to configure for this IAD. Changing this value will change the value of the Required sustained cell rate parameter; you should update the ATM switch configuration for the appropriate VCC to reflect this. In addition, changing this value may require the value on the IAD group for this IAD to be updated.
Maximum concurrent calls allowed (PCM only) Change Inactive Maximum number of PCM (G.711) calls that can be in progress at any one time on the IAD. This value allows you to restrict the amount of bandwidth used on the VCC to the IAD, on the assumption that not all voice ports on the IAD will need to be in use at the same time. For the purposes of this count, if a tone (such as the reorder tone) is being played to a subscriber outside of a call, the subscriber is viewed as being in a call for the duration of the tone. If a PCM call setup attempt is made to or from the IAD after this count has been reached, the call setup attempt will be rejected. This value cannot exceed the value of Maximum concurrent calls allowed (all types) for this IAD. If the IAD supports only PCM and not ADPCM (AAL2 channel profile is set to Profile 9), the two values should be the same. Changing this value will change the value of the Required sustained cell rate parameter; you should update the ATM switch configuration for the appropriate VCC to reflect this. In addition, changing this value may require the value on the IAD group for this IAD to be updated.
Required sustained cell rate Read only The sustained cell rate required to support calls on this IAD. This is calculated from the values for Maximum concurrent calls allowed (all types) and Maximum concurrent calls allowed (PCM only). Ensure that the ATM switch configuration for the appropriate VCC matches this value, as follows:
  • If the VCC is configured to use CBR, specify this cell rate and a cell delay variation tolerance of 20ms.
  • If the VCC is configured to use VBRT, specify this cell rate, a maximum burst size of 0.02 times this cell rate (rounded up), and a cell delay variation tolerance of 20ms.
Calls in progress (all types) Read only The number of calls currently in progress on the IAD. This count includes both ADPCM (G.726) and PCM (G.711) calls, and includes any subscriber for which a tone (such as the reorder tone) is being played, regardless of whether the subscriber is actually in a call. This count is normally less than Maximum concurrent calls allowed (all types) when the Media Gateway is in a steady state, but may briefly exceed the maximum in transient conditions when calls are being released.
Calls in progress (PCM only) Read only The number of PCM (G.711) calls currently in progress on the IAD. This count includes any PCM subscriber for which a tone (such as the reorder tone) is being played, regardless of whether the subscriber is actually in a call. This count is normally less than Maximum concurrent calls allowed (PCM only) when the Media Gateway is in a steady state, but may briefly exceed the maximum in transient conditions when calls are being released.
Cell delay variation Change Inactive The cell delay variation in milliseconds for terminations using this IAD. This value is used to help cancel out variation in the arrival rate of voice data cells from the IAD. (This variation is also known as jitter.) Larger values may improve quality, especially for modem and fax, but will add a small delay to the voice data received from the IAD. Note that increasing this value allocates extra resources on the ATM adaptor and frequent use of values greater than 16ms may reduce the total concurrent call capacity. Range: 1 - 100. The default is 11.
IAD Group Change Inactive The IAD Group to which this IAD belongs. Select from the list of configured IAD Groups.
ATM Port name Change Inactive The Fault Tolerant ATM Port that this IAD is connected to. Select from the displayed list of Fault Tolerant ATM Ports. Note that the ranges of valid values for the VPI, VCI and Base channel ID depend on the ATM Port selected. (Both ATM Ports associated with the Fault Tolerant ATM Port should have the same VPI and VCI ranges.) If you change this field such that the values previously set for VPI, VCI and Base channel ID are not within the ranges for the new ATM Port, the values in these fields are automatically deleted and you must specify new values.
VPI Change Inactive The VPI of the PVC used by this IAD to access the VP3000. This must be within the VPI range defined for the ATM Port selected.
VCI Change Inactive The VCI of the PVC used by this IAD to access the VP3000. This must be within the VCI range defined for the ATM Port selected.
Base channel ID Change Inactive Identifies the channel ID of the base AAL2 channel. The AAL2 channel used for a particular voice port on an IAD is the base AAL2 channel plus the voice port ID. This must be within the range defined for the ATM Port selected. Range: 16 - 127.
AAL2 channel profile Change Inactive Specifies which AAL2 profile is used for AAL2 channels used by this IAD. Values:
  • Profile 9
    PCM-64, 44 octet packets, no silence suppression.
  • Profile 10 (default)
    PCM-64, ADPCM-32, 44 octet packets, no silence suppression.
Attached DSLAM alarm suppression Change Inactive Specifies whether the DSLAM to which this IAD is attached suppresses alarms above a threshold. Values:
  • True
  • False (default)
LES EOC channel supported Change Inactive Specifies whether the IAD supports a LES EOC channel. Values:
  • True
  • False (default)
Maximum IAD waiting delay Change Inactive This field is visible only if LES EOC channel supported is set to True. Defines the maximum waiting delay, in seconds, used during restart. When the IAD is powered on, it should initiate a restart timer with a random value between zero and the value set in this field. Upon expiry of this timer, or when activity is detected, the IAD should initiate the restart procedure. The default is 600s.
IAD preconfigured to defaults Change Inactive This field is visible only if LES EOC channel supported is set to True. Specifies whether the IAD has already been preconfigured or whether the VP3000 should configure it. Values:
  • True
    The IAD has already been preconfigured. The VP3000 will configure the IAD only if the configuration options for this object are set to values other than the defaults.
  • False (default)
    The IAD has not been preconfigured, and the VP3000 will configure it at startup.
Packet delay variation Change Inactive This field is visible only if LES EOC channel supported is set to True. The amount of packet delay variation, in ms, to be accommodated on all ports of the IAD. The default is 20.
Voice impairment period for threshold crossing events Change Inactive This field is visible only if LES EOC channel supported is set to True. The period, in minutes, over which the number of voice impairments should be counted to determine whether a threshold crossing event has occurred. It is recommended that this field is set to a multiple of 5 minutes. The default is 15.
Maximum SSCS SAR SDU size Read only This field is visible only if LES EOC channel supported is set to True. Specifies the maximum size that a SSCS SAR SDU can take, as defined in I.366.1.
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
    Wait for existing child objects to become inactive before deactivating the object, but do not allow any new child objects to be activated.
OAM loopback test status Read only Status of the last OAM loopback test that was requested by clicking on the OAM loopback pushbutton. Values:
  • Not available
    MetaSwitch cannot run an OAM loopback test to the IAD, because of excessive error conditions. If this IAD is alarmed, check the alarm log for details of the problem. If there is no alarm log, ensure that the IAD and its associated Media Gateway and Fault Tolerant ATM Port have been activated. If all required resources are active, check the Fault Tolerant ATM Port and any alarmed IADs to see if there is a wider problem (such as power outage or failure of a DSLAM).
  • Not requested
    An OAM loopback test has not yet been requested.
  • In progress
    An OAM loopback test is in progress.
  • Succeeded
    The IAD has successfully responded to an OAM loopback test made by MetaSwitch. This means that the physical connection to the IAD is in place and the IAD is powered up. If the IAD is still alarmed, check the alarm log for details of the problem. If the IAD is not alarmed but a problem persists, there may be incompatibility issues with the IAD being used, or with an individual subscriber's connection or equipment.
  • Failed
    The IAD has not responded to an OAM loopback test made by MetaSwitch. If there is an alarm log, check it for details of the problem. If there is no alarm log, ensure that the IAD and its associated Media Gateway and Fault Tolerant ATM Port have been activated.
(*) Last refresh time Read only This field is visible only if LES EOC channel supported is set to True. The time at which the information read from the IAD was last refreshed.
(*) IAD VPI Read only This field is visible only if LES EOC channel supported is set to True. The VPI of the PVC at the IAD. This is not necessarily the same as VPI.
(*) IAD VCI Read only This field is visible only if LES EOC channel supported is set to True. The VCI of the PVC at the IAD. This is not necessarily the same as VCI.
(*) Echo cancellation supported Read only This field is visible only if LES EOC channel supported is set to True. Indicates whether the echo cancellation facility is supported at the IAD. This field is set to Unknown until the IAD has been queried. Values:
  • Yes
  • No
  • Unknown
(*) Total number of voice ports Read only This field is visible only if LES EOC channel supported is set to True. The total number of voice ports supported on the IAD.
(*) Timing method Read only This field is visible only if LES EOC channel supported is set to True. The method used by the IAD to determine timing. Values:
  • Local Network
    Voice timing is derived from the local network interface.
  • Incoming cell rate
    Voice timing is derived from the incoming cell rate.
  • Internal
    Voice timing is derived from an internal free-running timing source.
  • Unknown
    The IAD has not yet been queried to determine the timing reference.
(*) Vendor Read only This field is visible only if LES EOC channel supported is set to True. Name of the vendor that produced the IAD.
(*) Model Read only This field is visible only if LES EOC channel supported is set to True. Vendor's designated model number for the IAD.
(*) Hardware version Read only This field is visible only if LES EOC channel supported is set to True. The vendor's designated hardware version for the IAD.
(*) Software version Read only This field is visible only if LES EOC channel supported is set to True. The vendor's designated software version for the IAD.
(*) Time since last re-initialization Read only This field is visible only if LES EOC channel supported is set to True. The time, in hundredths of a second since the IAD was last re-initialized.
(*) Number of CPCS packets received Read only This field is visible only if LES EOC channel supported is set to True. Number of CPCS packets received.
(*) Number of CPCS packets transmitted Read only This field is visible only if LES EOC channel supported is set to True. Number of CPCS packets transmitted.
(*) Number of CPS parity errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the start field indicates a transmission error (as specified in I.363.2).
(*) Number of sequence number errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the sequence number of the start field is wrong (as specified in I.363.2).
(*) Number of CPS OSF mismatch errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the number of octets expected for the CPS packet header overlapping into the protocol data unit does not match the information contained in the start field (as specified in I.363.2).
(*) Number of CPS OSF errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the offset field of the start field contains a value of 48 or greater (as specified in I.363.2).
(*) Number of CPS HEC errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the HEC code of the CPS packet header indicates transmission errors in the packet header (as specified in I.363.2).
(*) Number of oversized CPCS packets Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the length of the received CPS SDU exceeds the maximum length (as specified in I.363.2).
(*) Number of CPS reassembly errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where a partial CPS packet has been received but is discarded due to errors detected before reassembly of the CPS packet could be completed (as specified in I.363.2).
(*) Number of CPS HEC overlap errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the HEC code of a CPS packet header that was overlapping a protocol data unit boundary indicates transmission errors in the CPS packet header (as specified in I.363.2).
(*) Number of CPS UUI errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the UUI field of the received CPS packet header contains a value that is reserved for future standardization (as specified in I.363.2).
(*) Number of CPS CID errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the channel ID in the received CPS packet header is not associated with a service access point (as specified in I.363.2).
(*) Number of oversized SSSAR packets Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the maximum allowed size for a reassembled SSSAR service data unit has been exceeded (as specified in I.366.1).
(*) Number of reassembly timer expiry errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the reassembly timer has expired (as specified in I.366.1).
(*) Number of undersized SSTED packets Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where a SSTED protocol data unit of length 8 or less has been received (as specified in I.366.1).
(*) Number of SSCS length errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the value of the length field in an SSTED protocol data unit does not match the length of the received SSTED protocol data unit (as specified in I.366.1).
(*) Number of CRC mismatch errors Read only This field is visible only if LES EOC channel supported is set to True. Number of errors encountered where the value of the CRC field is not equal to the CRC calculated over the received information (as specified in I.366.1).
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 (UTC) at which the Alarm state last changed.
Alarm events reset timestamp Read only The time (UTC) at which the alarm count was last reset to zero.
Diagnostics - log level Change Specifies the level of logs recorded for this object. Logs with a priority equal to or greater than the priority specified are recorded. Set to Default level to use the system-wide default level. Values:
  • Level 10 (diagnostics)
  • Level 20 (verbose statistics)
  • Level 30 (verbose operational)
  • Level 40 (statistics)
  • Level 50 (audit)
  • Level 60 (operational)
  • Level 70 (unexpected)
  • Level 80 (error)
  • Level 90 (fatal)
  • Default level (default)
Diagnostics - API trace enabled Change Specifies whether API tracing is enabled for this object. If set to True, the Diagnostics - trace tag must be specified. Values:
  • True
  • False (default)
Diagnostics - trace tag Change The diagnostics tag inserted into API tracing and PD logging for this object. This tag may include any ASCII characters other than whitespace.
Requested status Read only Specifies whether an administrator has attempted to activate the IAD. 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 IAD. Values:
  • Active
    The object is active.
  • Going Active
    Activation is in progress.
  • Going Inactive
    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.