Operation

Concatenated SMS

The SLBP tracks which upstream platform the first part of a concatenated SMS is routed to and routes each subsequent part via the same upstream platform.

The routing of parts takes into account the customer SMPP session and the SAR reference to ensure there is no routing interference caused by different messages being sent to the same destination mobile.

The SLBP supports parts of a concatenated SMS being received out of order.

Updating customer configuration

Changes to the weight of a target for an existing customer SMPP session will take effect immediately. However, changes that involve adding or removing targets for a customer require the customer to re-connect (i.e. rebind) to the SLBP.

{
      "systemid": "773913",
      "targets": [
        {
          "name": "smsc1",
          "weight": 1
        },
        {
          "name": "smsc2",
          "weight": 1
        },
        {
          "name": "smsc3",
          "weight": 0
        }
      ]
    }

Caution should be taken when updating customer configuration when the intention is to remove targets from the pool of targets. The SLBP will maintain connections to the set of targets for an existing session based on the configuration when they connected to the SLBP, even if a target is removed from the configuration. It is only when the customer rebinds that there will no longer be a connection to the removed target.

The recommended approach is to initially set the weight to 0 instead of removing the target from configuration, and then remove the target from the customer configuration immediately prior to arranging the customer to rebind (or forcing a rebind).

Stop sending customer submissions to a target

To ensure that the customer receives delivery receipts for messages pending on a target, do not remove the target from the customer configuration. Instead, to stop messages being submitted but allow delivery receipts from that target to reach the customer, simply change the weight of the target to 0. When the point in time comes when no more delivery receipts are to be received (e.g. after the validity period of the submission), the target can be removed from the customer’s configuration.