Routing Action

Each Routing Action object is a child of a Routing Table object.

Each object contains information about a particular routing action in a routing table and how it is selected.


Note that when the parent Config Set is active, this object cannot be modified; all fields are read only and all actions are disabled. You must deactivate the parent Config Set before you can modify the object.



Where routing actions are based on the current time, this uses the local time of the Call Agent or Integrated Softswitch.


Parameter

Access

Description
Description Change A text string used in the EMS System Explorer to identify this Routing Action. Specify a string of up to 32 characters.
Incoming release cause match Change This field appears only if the Routing table type field of the parent Routing Table is set to Incoming release cause. Specifies how to match on the incoming release cause. Values:
  • No release cause (default)
    Match only if the call has no associated release cause (for example on the first pass through routing).
  • ISUP/ISDN release cause
    If the last attempted routing of the call was over an ISUP trunk, match on a specific release cause value from this attempt (identified in the Incoming release cause field). This option is used in re-routing a call based on the release cause from the previous routing attempt.
  • Any release cause if present
    Match if the call has any associated release cause value, including those resulting from attempts to route the call over a SIP trunk.
  • Match any
    Match any call regardless of whether it has an associated release cause.
Incoming release cause Change This field appears only if Incoming release cause match is visible and set to ISUP/ISDN release cause. Specifies the value of the incoming release cause that matches this entry. The valid values for this attribute are a subset of those defined in Q.850; the other values defined in Q.850 identify release causes for which re-routing is not appropriate, or are not appropriate to ISUP trunks. See Incoming Release Causes below for a full list of values.
Address type Change This field appears only if the Routing table type field of the parent Routing Table is set to Destination address, Source address or Transit address. Type of address used to match this action. Values:
  • Not present
    Matches absence of address.
  • E.164
    Matches destination and source addresses.
  • Network ID
    Matches transit network addresses.
Address scope Change This field appears only if the Address type field is visible and set to E.164. Scope of address used to match this action. Values:
  • Unknown
  • International
  • National
  • Subscriber
  • No number
  • UK specific
  • Match any (default)
Wildcard address type Change This field appears only if the Routing table type field of the parent Routing Table is set to Destination address, Source address or Transit address. Type of wildcard address used to match this action. Values:
  • Explicit wildcard
    Match on the exact address, as specified in the Wildcard address and Address type fields.
  • Full wildcard - any type
    Match on any address of any type.
  • Full wildcard - this type
    Match on any address with the address type specified in the Address type field.
  • Part wildcard header
    Match on an address with the address type specified in the Address type field that starts with the string specified in the Wildcard address field.
Wildcard address Change This field appears only if the Wildcard address type is visible and set to Explicit wildcard or Part wildcard header. Wildcard address used to match this action.
Wildcard address effective prefix length Change This field appears only if the Routing table type field of the parent Routing Table is set to Destination address, Source address or Transit address and the Address type is not set to Not present and the Wildcard address type is Part wildcard header. Length, in bytes, of the wildcard address effective prefix used to match this action. The effective prefix length is used to determine the precedence of alternative wildcard address matches. If the effective prefix length is the same as the actual length of the wildcard address, set this field to zero. The default is zero.
Subscriber NV and routing attributes Change This field appears only if the Routing table type field of the parent Routing Table is set to Subscriber NV and routing attributes. Subscriber routing attributes used to match this action. If required, select one or more of the following values:
  • Pre-paid / off-switch calling card subscriber
  • Fax / modem subscriber
  • Nomadic subscriber
Incoming Media type Change This field appears only if the Routing table type field of the parent Routing Table is set to Incoming Media type. Type of exchange used to match this action. Values:
  • Local
    Match on this switch.
  • Remote (any)
    Match on any remote exchange.
  • Remote (specified signaling stack)
    Match on the signaling stack type specified in the Incoming Media - Remote Signaling Stack field.
  • Remote (specified exchange)
    Match on the remote exchange specified in the Incoming Media - Remote Exchange field.
  • Remote (specified media channel)
    Match on the media channel specified in the Incoming Media - Remote Media Channel field.
Incoming Media - Remote Signaling Stack Change This field appears only if the Incoming Media type is visible and set to Remote (specified signaling stack). Signaling stack type used to match this action. Values:
  • ISUP
  • SIP
Incoming Media - ISUP Local Signaling Destination Change This field appears only if Incoming Media - Remote Signaling Stack is visible and set to ISUP. ISUP Local Signaling Destination used to match this action. Select from the displayed list of ISUP Local Signaling Destinations that are associated with a valid Signaling Gateway.
Incoming Media - Remote Exchange Change This field appears only if Incoming Media type is visible and set to Remote (specified exchange). Remote exchange used to match this action. Click on the ellipsis symbol to the right of this field to choose ISUP or SIP, then follow the dialogs to select the appropriate exchange.
Incoming Media - Remote Media Channel Change This field appears only if the Incoming Media type is visible and set to Remote (specified media channel). Remote media channel used to match this action. Click on the ellipsis symbol to the right of this field to choose ISUP or SIP, then follow the dialogs to select the appropriate channel or trunk from the list. Media channels that support only outgoing calls cannot be used to match this action and do not appear in the list.
Routing precedence Change This field and the following fields (Valid from, Valid until, Route from, and Route until) are visible only if the Routing table type field of the parent Routing Table is set to Current time. Each Routing Action in the table defines a specific period of time within the week for which it applies, together wth a start and end date for its validity. The routing precedence is used to resolve conflicts when there are two or more Routing Actions that apply at the same time; the action with the higher routing precedence is used. Specify a numeric value, which should not match the routing precedence of any other action in the table that can apply at the same time as this one (as defined by the following fields).
Valid from (year) Change The year in which this routing action first becomes valid. Specify a four-digit value.
Valid from (month) Change The month in which this routing action first becomes valid. Specify this as a numeric value (1 for January, 12 for December).
Valid from (date) Change The date within the month on which this routing action first becomes valid.
Valid until (year) Change The year in which this routing action ceases to be valid. Specify a four-digit value.
Valid until (month) Change The month in which this routing action ceases to be valid. Specify this as a numeric value (1 for January, 12 for December).
Valid until (date) Change The date within the month on which this routing action ceases to be valid.
Route from (day) Change The first day of the week on which this routing action applies. Values: Monday - Sunday.
Route from (hour) Change The hour on the specified day in which this routing action starts to apply. Range: 0 - 23.
Route from (minute) Change The minute past the specified hour at which this routing action starts to apply. Range: 0 - 59.
Route until (day) Change The last day of the week on which this routing action applies. Values: Monday - Sunday.
Route until (hour) Change The hour on the specified day in which this routing action ceases to apply. Range: 0 - 23.
Route until (minute) Change The minute past the specified hour at which this routing action ceases to apply. Range: 0 - 59.
Action probability Change This field appears only if the Routing table type field of the parent Routing Table is set to Weighted random or Sticky random. Probability, expressed as a percentage, of selecting this Routing Action. Range: 0 - 100. The action probabilities for all Routing Actions within the parent Routing Table must be chosen so that the total is 100%.
Bearer capability match Change This field appears only if the Routing table type field of the parent Routing Table is set to Bearer capability. Specifies how to match on the bearer capability that is being used by the call. Values:
  • Exact
  • Always match (default)
Bearer capability Change This field appears only if Bearer capability match is visible and set to Exact. Specifies the values of the bearer capability attribute that match this entry. If the call's bearer capability matches any of the values selected here, this entry counts as a match. Select one or more of the following values:
  • Speech or 3.1kHz audio
  • 64kbps data
  • 64kbps restricted
  • 56kbps data
Action Change Type of routing action to be performed if this action is chosen. Values:
  • Routing complete
    Routing is complete; the call should be routed using the media channel specified in the Media channel field.
  • Reject
    The call cannot be routed; the routing request should be rejected.
  • Table lookup
    Another routing table, specified in Next table, should be processed.
  • Return for reroute
    The call cannot be routed using the current Routing Table. Processing should return to the previous Routing Table and continue with an alternative matching Routing Action from that table, if one can be found.
Media channel Change This field appears only if Action is set to Routing complete. The Media Channel to be used for routing if this action is chosen. Click on the ellipsis symbol to the right of this field to choose whether to select from a list of ISUP Media Channels or SIP Trunks, then select the appropriate channel or trunk from the list. Media channels that support only incoming calls cannot be used for routing and do not appear in the list.
Next table Change This field appears only if Action is set to Table lookup. Next table to use in continued routing. Select from the displayed list of Routing Tables (which are all children of this Routing Action's grandparent Config Set). As a short-cut to select the Routing Table, you can type match details into the field and click on the search button to select from a list of items that match these details. Match details can be a text string, a wildcard string such as B*, a range such as CA-FL, an index value such as =3, or an index range such as =1-20. For more details, refer to the description of the Details panel in Operations Manual: Overview.
Temporary Alternate Routing indicator Change This field appears only if Action is set to Routing complete. Specifies whether this route is a temporary alternate route. This value is signalled over ISUP so that the call will not be routed on subsequent Temporary Alternate Routes. This mechanism is used to avoid calls taking unreasonable routes and to avoid possible routing loops in the network. Values:
  • True
  • False (default)
Call gapping interval Change This field appears only if the Routing table type field of the parent Routing Table is set to Call gapping. Time, in milliseconds, for which this action becomes unavailable each time it is chosen when the Routing table type field of the parent Routing Table is set to Call gapping. Range : 0 - 86400000
Attribute value - operator call match Change This field appears only if one of the Match attribute fields of the parent Routing Table is set to Operator call. Specifies how to match on the operator call attribute. Values:
  • Exact
  • Match any if present (default)
  • Match even if not present
  • Only match if absent
Attribute value - operator call Change This field appears only if Attribute value - operator call match is visible and set to Exact. Specifies the value of the operator call attribute (whether or not the call should be treated as an operator call) that matches this entry. Values:
  • True
  • False
Attribute value - Subscriber Group match Change This field appears only if one of the Match attribute fields of the parent Routing Table is set to Subscriber Group. Specifies how to match on the subscriber group attribute. Values:
  • Exact
  • Match any if present (default)
  • Match even if not present
  • Only match if absent
Attribute value - Subscriber Group Change This field appears only if Attribute value - Subscriber Group match is visible and set to Exact. Specifies the value of the Subscriber Group attribute that matches this entry.
  • For calls originating on this switch, this indicates the Subscriber Group with which the calling party is associated.
  • For calls originating at a different exchange, this attribute is set to zero.
The value of this attribute determines which Digit Map is used, and may be involved in number validation and routing decisions. Select from the list of configured Subscriber Groups.
Attribute value - US Call Type match Change This field is valid only in the US.
Attribute value - US Call Type Change This field is valid only in the US.
Attribute value - UK Call Type match Change This field appears only if one of the Match attribute fields of the parent Routing Table is set to UK Call Type. Specifies how to match on the UK Call Type attribute. Values:
  • Exact
  • Match any if present (default)
  • Match even if not present
  • Only match if absent
Attribute value - UK Call Type Change This field appears only if Attribute value - UK Call Type match is visible and set to Exact. Specifies the value of the UK Call Type attribute that matches this entry. Values:
  • Unknown (default)
  • Broadband
    Reserved for use by broadband services 092 - 099.
  • Corporate, toll-free
    Corporate toll-free number (typically starting 0500).
  • Corporate
    Corporate number (typically starting 05, except for 0500).
  • Directory enquiries
    Call to directory enquiries (for example 192, 195, or 153).
  • Emergency
    Emergency call (for example 999). If this value is set, the call will be retried continuously until it is connected successfully or until the caller hangs up.
  • International
    International call dialed from the UK.
  • Local
    Local call.
  • Local, non-geographical
    Non-geographic number charged at or below local rates. Typically used for numbers starting with 084, except for a few numbers in the 084 range that are toll-free (for example, unmetered internet access).
  • Mobile
    Mobile phone number (typically starting with 077, 078, or 079).
  • National
    National geographic number.
  • National, non-geographical
    National non-geographic number. Typically used for numbers starting with 087, except for a few numbers in the 087 range that are toll-free (for example, unmetered internet access).
  • Operator
    Operator call (for example 100 or 155).
  • Other carrier
    Access codes for other carriers.
  • Paging
    Paging services number (typically starting with 076).
  • Personal numbering
    "Find-me-anywhere" personal number (typically starting with 070).
  • Premium
    Premium rate number (typically starting with 090 or 091).
  • Repair
    Repair service (for example 151 or 154).
  • Toll-free
    Toll-free number (typically starting 0800).
  • Other
    Any number that does not match one of the categories above.
Attribute value - CIP match Change This field is valid only in the US.
Attribute value - CIP Change This field is valid only in the US.
Attribute value - ANI II digits match Change This field is valid only in the US.
Attribute value - ANI II digits Change This field is valid only in the US.
Attribute value - Dialed Prefix match Change This field is valid only in the US.
Attribute value - Dialed Prefix Change This field is valid only in the US.
Attribute value - Dialing Pattern match Change This field is valid only in the US.
Attribute value - Dialing Pattern Change This field is valid only in the US.
Attribute value - User Defined 1 - 20 match Change This field appears only if one of the Match attribute fields of the parent Routing Table is set to one of the values User Defined 1 - User Defined 20. If you have selected two or more User Defined Attributes as match attributes, this field appears once for each selected attribute. Indicates how to match on a User Defined Attribute. Select one of the following values.
  • Exact
  • Match any if present (default)
  • Match even if not present
  • Only match if absent
Attribute value - User Defined 1 - 20 Change This field appears only if Attribute value - User Defined 1 - 20 match is set to Exact. If you have selected two or more User Defined Attributes as match attributes, this field appears once for each selected attribute. Specifies the value of the User Defined Attribute that matches this entry. Specify an integer value in the range 0 - 2147483646.
Attribute value - Line Class Code 1 - 20 match Change This field appears only if one of the Match attribute fields of the parent Routing Table is set to one of the values Line Class Code 1 - Line Class Code 20. If you have selected two or more Line Class Codes as match attributes, this field appears once for each selected Line Class Code. Indicates how to match on a Line Class Code value defined for the subscriber associated with the Routing request. Select one of the following values.
  • Exact
  • Match any if present (default)
  • Match even if not present
  • Only match if absent
Attribute value - Line Class Code 1 - 20 Change This field appears only if Attribute value - Line Class Code 1 - 20 match is set to Exact. If you have selected two or more Line Class Codes as match attributes, this field appears once for each selected Line Class Code. Indicates the Line Class Code associated with the Routing request. Specify the Line Class Code as an integer value in the range 0 - 2147483646. The default is 0. Alternatively, for a validated Line Class Code, you can select a specific value from the list of valid values by clicking on the ellipsis symbol at the end of the field. Either scroll down the alphabetic list of code value descriptions to select the value you want, or type the first few letters of the code's description so that the alphabetic list scrolls to select the entry you want.
Attribute value - originating Signaling Gateway match Change This field appears only if one of the Match attribute fields of the parent Routing Table is set to Originating Signaling Gateway. Indicates how to match on the Originating Signaling Gateway attribute. Select one of the following values.
  • Exact
  • Match any if present (default)
  • Match even if not present
  • Only match if absent
Attribute value - originating Signaling Gateway Change This field appears only if Attribute value - originating Signaling Gateway match is set to Exact. Indicates the Originating Signaling Gateway associated with the Routing request. This identifies the MetaSwitch Signaling Gateway at which the call originated (in the case where the MetaSwitch NE includes two or more Signaling Gateways to support different point codes).
  • For calls from subscribers on this switch, the value is taken from the Subscriber Group configuration.
  • For calls received over SS7, the value is taken from the signaling gateway on which the ISUP IAM was received.
  • For other calls, the signaling gateway is not initially specified. If required, you can set it during number validation using the Signaling Gateway attribute.
Select from the displayed list of Signaling Gateways.
Attribute value - ESA Status match Change This field is valid only in the US.
Attribute value - controlling ESA Protection Domain Change This field is valid only in the US.
Number action - called number action Change This field appears only if the Action field is set to Routing complete or Table lookup. A character string specifying the editing actions to be applied to the dialed number at the end of routing if this row is matched. The syntax of this string is described in Number Actions below. Specify a string of up to 32 characters.
Number action - calling party number action Change This field appears only if the Action field is set to Routing complete or Table lookup. A character string specifying the editing actions to be applied to the calling party number at the end of routing if this row is matched. The syntax of this string is described in Number Actions below. Specify a string of up to 32 characters.
Optional attributes to set Change Select which attributes are added to the routing request. The attributes selected in this field will affect the following fields. Select any combination of the following values:
  • AAR allowed *
  • ARR allowed *
  • Routing control (UK only)
  • Circuit code (North America only)
  • MF tandem routing code (North America only)
  • MF international non-operator routing code (North America only)
  • MF international operator routing code (North America only)
  • Max channel usage **
  • Congestion level 1 acceptance probability **
  • Congestion level 2 acceptance probability **
  • Maximum call duration
  • Outgoing ISUP/ISDN release cause
Note the following points about these attributes.
  • Attributes can be set in any Routing Action, whatever the value of the Action field. If two or more Routing Actions applied to the same call specify different values for the same attribute, the last specified value overrides any earlier values.
  • The attributes marked * above are set to True by default for all calls, unless a Routing Action explicitly sets them to False. If you do not want to use one of these features, select the appropriate attribute and then explicitly set it to False in the following field.
  • The attributes marked ** above are set to 100% by default for all calls, unless a Routing Action explicitly sets them to a lower value.
AAR allowed Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Attribute used internally to specify whether Automatic Alternative Routing is allowed if this action is chosen. If this field is set to True, the Routing Policy Services user may retry routing if media channel allocation fails. Values:
  • True (default)
  • False
ARR allowed Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Attribute specifying whether Automatic Re-Routing is allowed if this action is chosen. If this field is set to True, the Routing Policy Services User may retry routing if signaling fails due to congestion at a subsequent exchange. Values:
  • True (default)
  • False
Routing control Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Attribute indicating the UK Routing Control value to be included in the routing request if this action is chosen. Values:
  • Alternate routing allowed, continuous retry allowed (default)
  • Alternate routing barred, continuous retry allowed
  • Alternate routing allowed, continuous retry barred
  • Alternate routing barred, continuous retry barred
  • Alternate routing allowed once, continuous retry allowed
  • Alternate routing allowed once, continuous retry barred
Circuit code Change This field is not valid in the UK.
MF tandem routing code Change This field is not valid in the UK.
MF international non-operator routing code Change This field is not valid in the UK.
MF international operator routing code Change This field is not valid in the UK.
Max channel usage Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Maximum channel usage (as a percentage of the channel's total capacity) to be used in admission control, if this action is chosen. A media channel whose usage is higher than the maximum channel usage will be rejected by admission control. Range: 0 - 100. The default is 100 (indicating that the channel will be rejected only when it has no free capacity).
Congestion level 1 acceptance probability Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Attribute that is added to the routing request after the media channel is selected and used internally. It specifies the probability, expressed as a percentage, of accepting a signaling link congested at congestion level 1. Range: 0 - 100. The default is 100 (indicating that the link is always used even if it is congested).
Congestion level 2 acceptance probability Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Attribute that is added to the routing request after the media channel is selected and used internally. It specifies the probability, expressed as a percentage, of accepting a signaling link congested at congestion level 2. Range: 0 - 100. The default is 100 (indicating that the link is always used even if it is congested).
Maximum call duration Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Attribute that is added to the routing request after the media channel is selected. It specifies the maximum permitted duration for a call. The call will be terminated if it continues for longer than the specified time; the duration is measured from the end of Routing processing in which the attribute is set. Specify the duration in minutes, in the range 1 - 1440 (1 minute - 24 hours), or specify zero to indicate no limit.
Outgoing ISUP/ISDN release cause Change This field appears only if this attribute is selected in the Optional Attributes to set field. If this field is visible, it is mandatory. Attribute that is added to the routing request after the media channel is selected. It indicates whether a specific release cause is to be reported to the originating switch if this call could not be routed on this switch, or if it was routed to another switch and was rejected there. The release cause will be reported only if the call was received over an ISUP trunk. Note that setting a release cause does not in itself cause the call to be rejected. The valid values for this attribute are a subset of those defined in Q.850; the other values defined in Q.850 are not supported, generally because they do not apply to ISUP trunks. See Outgoing Release Causes below for a full list of values and some restrictions on their use. Alternatively, you can specify Auto (the default) to indicate that the NE should use the release cause that it determined, or the release cause signaled by the terminating switch if the call was routed to another switch and was rejected there.
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 - 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 enable the Routing Action. Values:
  • Enabled
    The object has been enabled.
  • Disabled
    The object has not been enabled or has been disabled.
Actual status Read only Specifies the current status of the Routing Action. Values:
  • Enabled
    The object has been enabled.
  • Disabled
    The object has not been enabled or has been disabled.

Number Actions

The Number action - called number action and Number action - calling party number action parameters in the Routing Action object provide a mechanism for editing the called number (or the calling party number). This action is always applied after routing is complete, so that a subsequent Routing Action matching on one of these numbers uses the original numbers and not the edited numbers. If two or more editing actions are encountered while routing a call, only the last one is used at the end of routing.

The parameter consists of a character string specifying one or more edit actions to be applied to the number. Valid edit actions are:

PAdigits Add a prefix to the number. The characters PA are followed immediately by the digit(s) to be added as a prefix.
PDcount Delete a prefix from the number. The characters PD are followed immediately by the count of digits to be deleted from the start of the number.
SDcount Delete a suffix from the number. The characters SD are followed immediately by the count of digits to be deleted from the end of the number.
Rdigits Replace the complete number. The character R is followed immediately by the new digit string to replace the number.

The action string can contain two or more actions, which are executed in the order specified, so that the second acts on the modified number resulting from the first. Note that the Replace action cannot follow any other action because this would destroy the effect of the earlier action.

Examples of changes to the called number:

Incoming Release Causes

When an outgoing call attempt sent over an ISUP trunk is rejected because it cannot be routed, the remote switch can specify a release cause as an attribute to be signaled to the originating switch, which may help that switch to determine how to re-route the call.

The MetaSwitch NE supports the release cause values listed below, which are defined in the Q.850 specification.


Value

Description
2 No route to specified transit network (national use)
3 No route to destination
34 No circuit / channel available
41 Temporary failure
42 Switching equipment congestion
43 Access information discarded
44 Requested circuit / channel not available
46 Precedence call blocked
47 Resource unavailable, unspecified
58 Bearer capability not presently available
62 Inconsistency in outgoing information element
63 Service or option not available, unspecified
65 Bearer capability not implemented
69 Requested facility not implemented
70 Only restricted digital information bearer capability is available (national use)
79 Service option not implemented, unspecified
88 Incompatible destination
95 Invalid message, unspecified
97 Message type non-existent or not implemented
99 Information element / parameter non-existent or not implemented
102 Recovery on timer expiry
103 Parameter non-existent or not implemented - passed on (national use)
111 Protocol error, unspecified
127 Interworking, unspecified

Outgoing Release Causes

When an incoming call attempt received over an ISUP trunk is to be rejected because it cannot be routed, you can specify a release cause as an attribute to be signaled to the originating switch, which may help that switch to determine how to re-route the call.

The MetaSwitch NE supports the release cause values listed below, which are defined in the Q.850 specification. However, you should note the following restrictions.


Value


Description


ISUP
mapping


Extra
info?

1 Unallocated number Unchanged Yes
2 No route to specified transit network (national use) Unchanged Yes
3 No route to destination Unchanged Yes
4 Send special info tone Unchanged No
5 Misdialed trunk prefix Unchanged No
6 Channel unacceptable 31 No
7 Call awarded to established channel 31 No
8 Call pre-empted Unchanged No
9 Call pre-empted, circuit reserved Unchanged No
16 Normal call clearing Unchanged Yes
17 User busy Unchanged Yes
18 User not responding Unchanged No
19 User not answering Unchanged No
20 Subscriber absent Unchanged No
21 Call rejected Unchanged Yes
22 Number changed Unchanged Yes
27 Destination out of order Unchanged No
28 Invalid number format Unchanged No
29 Facilities rejected Unchanged Yes
30 Response to status inquiry 31 No
31 Normal, unspecified Unchanged No
34 No circuit / channel available Unchanged No
38 Network out of order Unchanged No
41 Temporary failure Unchanged No
42 Switching equipment congestion Unchanged No
43 Access information discarded Unchanged Yes
44 Requested circuit / channel not available Unchanged No
46 Precedence call blocked Unchanged No
47 Resource unavailable, unspecified Unchanged No
50 Requested facility not subscribed Unchanged Yes
53 Outgoing calls barred within CUG Unchanged No
55 Incoming calls barred within CUG Unchanged No
57 Bearer capability not authorized Unchanged Yes
58 Bearer capability not presently available Unchanged Yes
62 Inconsistency in outgoing information element Unchanged No
63 Service or option not available, unspecified Unchanged No
65 Bearer capability not implemented 79 Yes
66 Channel type not implemented 79 Yes
69 Requested facility not implemented Unchanged Yes
70 Only restricted digital information bearer capability is available (national use) Unchanged No
79 Service option not implemented, unspecified Unchanged No
87 User is not a member of CUG Unchanged No
88 Incompatible destination Unchanged No
90 Non existent CUG Unchanged No
91 Invalid transit network selection (national use) Unchanged No
95 Invalid message, unspecified Unchanged No
97 Message type non-existent or not implemented Unchanged Yes
98 Message not compatible with call state Unchanged Yes
99 Information element / parameter non-existent or not implemented 111 No
102 Recovery on timer expiry Unchanged Yes
103 Parameter non-existent or not implemented - passed on (national use) Unchanged Yes
110 Unrecognized parameter discarded Unchanged Yes
111 Protocol error, unspecified Unchanged No
127 Interworking, unspecified Unchanged No