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SS7 Link OOS Management

The screen capture below displays how to enable the IMG 2020 so if an SS7 link goes Out Of Service, the associated CIC's stay in service either a set amount of time, or till certain conditions are met. The screen capture below displays the ISUP Group object. The ISUP Group object is configured within the SS7 Network of objects under the Destination object. The screen capture below displays an ISUP Group created using the ANSI protocol. The procedure is the same for E1 (itu).

Functionality

Disable (Default) - Functionality is same as previous software. 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 as described below.

  • If SS7 link goes down, all associated idle CIC's (Not being used/controlled by an SS7 link) will immediately go Out Of Service.

  • If SS7 link goes down while call was in the connected state. Once the call is hanged up, the associated CIC will be taken Out Of Service.

  • If SS7 link goes Out Of Service and then comes back into service while the call was in the connected state the call will be dropped when SS7 link comes back into service. The CIC will then be set to an idle state.

  • Once SS7 signaling link goes down, a 2 minute timer is started. Once the timer expires, all CIC's will immediately be taken Out Of Service.

  • A call is being made from SS7 to SIP and the SS7 link goes down while an associated CIC is in the ringing state. The IMG 2020 will keep the CIC In Service until 2 minute timer expires. After the timer has expired, the CIC is taken Out Of Service.

  • A call is being made from SIP to SS7 and the SS7 link goes down while associated CIC is in the ringing state. The IMG 2020 will take the CIC Out Of Service.

  • A call is being made from SIP to SS7 and the SS7 link goes down and then comes back into Service while an associated CIC is in the ringing state. The IMG 2020 will abort the call and set CIC back to its idle state.

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