SS7 - Destination - ISUP Group - ITU

The ISUP Group object is created under the SS7 Destination object. The ISUP Group object defines the attributes of a set of ISUP parameters. These attributes will be linked to one or more groups of ISUP channels/CICs. To create the ISUP Group, right click on the SS7 Destination object and select New ISUP Group. The contents of the object will vary depending on whether the associated SS7 Stack is ANSI or ITU. For a list of additional advanced ISUP group parameters, right click on the ISUP Group and a drop down menu displaying the additional ISUP parameters will appear. Once all the ISUP parameters are configured, the ISUP group will need to be linked to one or more groups of CICs. Right click on the ISUP Group and select New SS7 Circuit Group. The CIC group created will now be linked to the Group of CICs.

For information regarding the ISUP Group with an ANSI stack selected in the OPC-DPC field, refer to the .

Web GUI Page

Dialogic > SS7 > SS7 Network > SS7 Stack > SS7 Destination > New SS7 Group

Open

Maximum Objects

512 ISUP Groups per IMG 2020

Related Topics and Dependencies

The ISUP Group is created under the SS7 Destination object. The ISUP Group contains a set of ISUP parameters that will be utilized during the call setup process. Within the ISUP Group are a list of basic parameters to be configured. Also, a list of additional parameters are available by right clicking on the ISUP Group object and selecting one of the additional parameters from the drop down list. The additional parameters created will also become part of the ISUP Group. Once the ISUP Group object is configured, individual SS7 Circuit Group objects (CICs) can be created under the ISUP Group. The SS7 Circuit Group is created to configure spans/channels into a group of CICs. Each group of CICs created will have a starting CIC number and a node that the CICs will reside on configured onto them. Once one SS7 Circuit Group (CICs) is configured, more Circuit Group objects can be created under the Channel Group. Refer to the Configure SS7 topic which describes the SS7 configuration process.

Field Descriptions

ISUP Profile

Within the ISUP Profile field is a drop down menu that displays all the individual ANSI or ITU ISUP Profiles currently available. Click in the ISUP Profile field and select the ISUP profile that will be linked to the ISUP Group being configured. Refer to SS7 - ISUP Profile - ITU or SS7 - ISUP Profile - ANSI topic for more information on the ISUP Profile object.

Glare Rule

Indicates how simultaneous incoming and outgoing seizures of the same SS7 channel are resolved.

Odd/Even (Default) - The incoming seizure is denied if:

The OPC value is less than the DPC value and the CIC number is odd

The OPC value is greater than the DPC value and the CIC number is even (ITU-T Recommendation Q.767).

Drop Outgoing Call - The incoming seizure is denied.

Drop Incoming Call - The outgoing seizure is denied.

Incoming Continuity Check

If the IMG 2020 receives an IAM with Continuity Check required, the selections below decide how this will be handled.

Wait for COT (Default) - Wait for the Continuity Message (COT) before sending the INVITE or Setup message (Outgoing IP channel groups).

Do not wait for COT - Propagate the IAM with Continuity check required on previous circuit (Outgoing SS7 channel groups).

Out Continuity Check

The Out Continuity Check field indicates how frequently outgoing calls on the SS7 channel undergo an automatic continuity check.

Satellite Circuit

This field indicates if this SS7 channel makes use of a satellite facility.

CIC Service Rule

Indicates which SS7 message is sent when an SS7 stack on the IMG 2020 takes an SS7 channel out-of-service.

Block (Default) - The SS7 stack sends an SS7 Blocking (BLO) message. The SS7 stack will then send an SS7 Unblocking (UBL) message when the IMG 2020 puts the SS7 channel back in service.

No Bloc - The SS7 stack does not send SS7 message. This stack will send an SS7 Reset Circuit (RSC) message when the IMG 2020 puts this SS7 channel back in service.

No Action - The SS7 stack does not send an SS7 message. 

Hop Counter

Indicates the number of switches that can have processed a call before the call is dropped.

Off (Default) - Feature is Disabled. Switch will not reject call.

01-31 - Select from drop down list the number of switches that can process the call before call is dropped.

State Transitions

Discard Privacy INFO

Discard Privacy info omits Calling Line Identification (CLI) parameters in the ISUP message. Choices shown below:

Refer to the IMG 1010 - Configuring SIP Privacy topic for more information.

TMR Screened Cause Value

LNP Routing Enable

Use this field to enable or disable Local Number Portability routing.

Refer to the Local Number Portability (LNP) topic for more information.

SS7 - Destination - ISUP Group - ITU

Disable (Default) - If Signaling Link goes Out Of Service, then the associated CIC's will go Out Of Service as well.

Enable - If signaling link goes Out Of Service all associated CIC's which are in the idle state will go Out Of Service. If any CIC's are in either the ringing or connected state the CIC's will not go Out Of Service until a later subsequent condition occurs. See IMG 1010 - SS7 Link OOS Handling for more information on configuration and functionality.

Early ACM

Disable (Default) - When disabled, the IMG 2020 is unable to receive or transmit an early ACM message.

Enable - When enabled, the IMG 2020 is able to receive or transmit an early ACM message.

In an outgoing SS7 call, upon ACM reception, the ACM is not interworked to an 18x message.

Open

In an incoming SS7 call, upon reception of an IAM message, an ACM message is immediately replied. In this early ACM message, the parameters BCI/CI=00 and CPS=0. In this case, the IMG 2020 will not send Cut Thru message and will not play ring back tone.

CIC Mapping

Select whether CIC will be mapped according to ISUP or JT ISUP specifications. This configuration property is only available for SS7 Stack with ISUP field set to JTISUP or JTISUPTTC variant.

ISUP (Default) - The CIC mapping will follow ISUP specifications.

JTISUP - The CIC mapping will follow JT ISUP specifications. See JT ISUP CIC Mapping for more information.

Outgoing Parameter Compatibility Insertion

The IMG 2020 can be configured to add compatibility information to the BISUP portion of an outgoing IAM message. The compatibility information added are instructions of what to do when an exchange receives unrecognized signaling information. These parameters are invoked to ensure predictable network behavior.

False (Default) - Do not add the compatibility information to outgoing IAM optional parameters.

True - When True is selected, this opens multiple fields below it. The fields opened are the compatibility information that can be added to the outgoing IAM optional parameters. After selecting true, you will need to configure the compatibility fields below.

Transit at Intermediate Exchange

transit interpretation (Default) - If set to transit interpretation, the remaining indicators are ignored at the far end exchange.

end node interpretation - If it is set to end node interpretation, the actions in accordance with the setting of the remaining indicators are performed at the far end exchange.

Release Call

do not release call (Default) - The Call is not released if an unrecognized parameter is received at far end exchange.

release call - The Call is released if an unrecognized parameter is received at far end exchange.

Send Notification

If an unrecognized parameter is received at far end exchange and the Release Call indicator is set to do not release call then the following is true

do not send notification(Default) - no messages are sent

send notification - a confusion message is sent towards the exchange that sent the unrecognized information.

Discard Message

If an unrecognized parameter is received at far end exchange and the Release Call indicator is set to do not release call then the following is true

do not discard message (pass on) (Default) - the message is passed on to far end exchange.

discard message - The message is discarded as instructed.

Discard Parameter

If an unrecognized parameter is received at far end exchange and the Release Call indicator is set to do not release call then the following is true

do not discard parameter (pass on)  (Default) - the parameter is passed on to the far end exchange.

discard parameter - The parameter is discarded as instructed.

Pass On Not Possible

If an unrecognized parameter is received at far end exchange and the Release Call indicator is set to do not release call then the following is true.

release call (Default)  - call will be released and nothing is passed on.

discard message - The message is discarded as instructed.

discard parameter - The parameter is discarded as instructed.

Extension

Information sent in every octet in a multi-octet parameter field with variable length, indicating whether the octet is the last one or is followed by another one.

information continues through the next octet (Default)- decimal value is greater than 255 will require the use of the parameter extension mechanism.

last octet- decimal value is less than 255 will not require the use of the parameter extension mechanism.

Broadband/Narrowband Interworking

Information indicating reaction to be taken if unrecognized information is received at a broadband/narrow-band interworking point.

pass on(Default) - Pass the information on.

discard message - The message is discarded as instructed.

release call - call will be released and nothing is passed on.

b- The parameter is discarded as instructed.

Transparent ISUP via SIP-T

The field Transparent ISUP via SIP-T is utilized when messaging is being received via SIP-T on incoming channel group and is being sent out of IMG via an SS7 ISUP Channel group. Before configuring verify that SIP-T is enabled and configured. See SIP Signaling and  SIP-T entity for more information on configuring/enabling SIP-T:

Once the SIP-T is configured then the Transparent ISUP via SIP-T field can be configured.

Disabled (Default) - When field is set to Disabled (Default) the IMG will function normally. Messages received via SIP-T will be processed through the IMG and any parameters that are added or modified through the IMG configuration will be modified and sent out the SS7 ISUP channel group in an outgoing IAM message.

Enabled - When field is set to Enabled any messages being received via SIP-T will be sent to the outgoing ISUP channel group unchanged regardless of the configuration set on the IMG. Any modifications or parameter overrides due to the configuration set on the IMG will be ignored.