Creating and Modifying ISDN Signaling Groups

Specifies the admin state of the Signaling group.

• Enable: Enables the signaling group.
• Disable: Disables the signaling group.
• Drain: When Drain is selected, calls that are currently up remain connected. However, new calls and forking are not allowed for the Signaling Group. This allows all the calls to be drained from the SG.

Specifies the physical T1/E1 port used for this Signaling Group.

Specifies whether or not the port is fractional. If selected, you must add a list of channels

Specifies to which channels the Signaling Group is applied if the port is fractional

Click here to see how the channel list is configured

Channel List Selection

Specifies the ISDN variant for this signaling group.

Specifies the ISDN user/network side for this signaling group .

Specifies when to generate local ring back

• Auto: Depends if inband audio is available
• Always: Always generate inband ringback
• Never: Never generate inband ringback

Specifies if service messaging is used on the signaling group. Only valid for ATT 4ESS, ATT 5ESS, NI2 and INS Sonus 1500 Switch Variants.

Specifies if received overlap dialing is enabled on the signaling group. Only valid for Euro ISDN (ETSI) and QSIG Switch Variants.

Specifies whether or not overlap sending is enabled. Overlap sending is not executed if an ActionSet is configured for the inbound Signaling Group of if Fork Call is set to Yes in the call route. Only valid when QSIG or Euro ISDN are selected in the Switch Variant list box.

Specifies whether or not a Q.931 PROGRESS message is sent to the far-end so that it does not timeout (T310) while the SIP response is pending from the SIP leg, causing the call to release.

This setting should be enabled when deploying the SBC 1000-2000 and Lync with a PSTN Provider. Only disable this parameter if your PSTN environment does not support PROGRESS sent before ALERT.

Specifies the ISDN Q931 Channel Identification attribute, telling the far end whether the channel identification selected in the Sonus SBC 1000/2000 setup message to the far end is fixed or suggested.

Always use Exclusive unless it is not supported by the peer switch.

Specifies the way the Terminal Equipment Identifier (TEI) is assigned by the Sonus SBC 1000/2000.
The TEI is a numbering mechanism used by the network termination (NT) side to distinguish between more than one terminal equipment (TE) devices to which it is physically connected.

Specifies the TEI to assign for BRI when set to user side. 0 through 63 are absolute values to assign. If signaling group is PRI or network side BRI this parameter is not used. This field is available only when the TEI Assignment Type is set to Static.

Specifies whether or not the Q.931 SETUP message is sent to the far-end should include the DISPLAY Information Element (IE).
Available only when ISDN Side is set to User and the Switch Variant is set to NI2 or Euro-ISDN.

If this option is enabled, the DISPLAY IE is populated for NI2 or Euro-ISDN switch types, otherwise the DISPLAY IE is not populated for these switch types.

In general, the DISPLAY IE is populated according to ISDN communication standards. The NI2 and Euro-ISDN specifications state that the DISPLAY IE should not be populated. This option allows you to override that configuration for your environment.

This configuration option enables the ISDN Signaling Group to add/configure a Progress IE to the outbound SETUP message if it is not present. Options are as follows:

• None (a Progress IE is not added if there is none present, and not modified if present)
• Not end to end ISDN (call is not end to end ISDN)
• Destination not ISDN (destination address is not ISDN)
• Origination not ISDN (originiation address is not ISDN)
• Return to ISDN (call has returned to the ISDN)
• Interworking Encountered (interworking has been encountered)
• Inband Information (in-band information or appropriate pattern now available)
• Delay Encountered (delay in response at destination interface)

Default entry: None.

Specifies whether to include the Interface Identifier in the Channel Identification Information Element.

Specifies whether the Signaling Group transmits a Facility message passed through from another ISDN Signaling Group. This field is available only when Euro ISDN or QSIG are selected as a Switch Variant.

Controls whether the redirecting number is sent in the Facility IE for EuroISDN (ETSI). This configuration also uses the following ASN.1 hard coded fields which are hidden for EuroISDN:

• ASN.1 Protocol Identifier (set as default ROSE)

• ASN.1 Numbering Space (set as default Local)

Valid entries: Enabled (sends the Redirecting number in Facility IE) or Disabled (default; does not send Redirecting number in Facility IE). This field is available only when EuroISDN is selected as the Switch Variant. All ETSI specific ISDN Signaling groups must be configured the same system-wide for this field.  

Specifies the Protocol Identifier to use within ASN.1 for QSIG. All QSIG specific ISDN Signaling groups must be configured the same system-wide for this field.

Specifies the ASN.1 numbering space for QSIG. All QSIG specific ISDN Signaling groups must be configured the same system-wide for this field.

Specifies whether or not to include the Network Facility Extension and Interpretation APDU in ASN.1 for QSIG. All QSIG specific ISDN Signaling groups must be configured the same system-wide for this field.

Method that Call Control uses to allocate ISDN channels. This is only valid for Outbound or Bidirectional Direction settings.

• Standard: This option assigns the first available low numbered channel.
• Reverse Standard: This option assigns the last available high numbered channel.
• Round Robin: This option assigns channels based on next available from low numbered to high numbered.
• Least Idle: This option chooses channels based on the least idle channel.
• Most Idle: This option chooses channels based on the most idle channel.

Indicates the direction of calls supported

• Inbound: Support only incoming calls from ISDN endpoints.
• Outbound: Support only outgoing call to ISDN endpoints.
• Bidirectional: Support both incoming or outgoing calls to ISDN endpoints.

Specifies the Tone Table to use on this signaling group. This option is only available when Inbound or Bidirectional are specified for Direction.

Specifies the Action Set Table to use on this signaling group. This option is only available for Inbound and Bidirectional.

Specifies the Call Route Table to use on the signaling group to route calls with. This option is only available when Inbound or Bidirectional are specified for Direction.

In the event of a "No Channel/Circuit available" release cause code, the specified cause code will be sent to the relevant protocol module. For more information see the list of Cause Codes.

NOTE: This attribute relates only to Inbound calls on the Signaling Group where applied.

This parameter defines the timeout value for the inband message play time (when Play Inband Message post-disconnect is configured as Yes). Valid range: 1 - 300 seconds. Default value: 10 Seconds. This field is displayed only when Play Inband Message post-disconnect is set to Yes.

Specifies that the channel is immediately disconnected when a DISCONNECT message progress indicator is received and there is a Cause Code match. The Cause Code is specified in the Q.850 Cause Codes text box. This field is only visible when the Yes is selected in the Play Inband Message Post-Disconnect list box.

A list of user specified Q.850 Cause Codes. If any of the specified Cause Codes appear in the DISCONNECT message, the channel is disconnected immediately. This field is only visible when the Yes is selected in the Immediate Disconnect On Causecode list box.

Specifies the interval of time, in seconds, after an call is initiated that the Sonus SBC 1000/2000 waits for a call to connect before terminating the incoming call.