Definition The timer determines the duration for the SCCP layer to wait for the response from the peer layer when an upper layer requires the connection and the SCCP layer sends the CR message or receives the CR message from the peer layer. Basic Information | PID | Timer Index | Timer Sequence Number | Value Range | Default Value | Adjustment Granularity | Standard Compliance | Timer ID in Standards | | 179 | 0 | 255 | 60s to 360s | 90s | 1s | Q0714E | T (CONN EST) | Working Principle | Item | Description | | Start time | The SCCP layer sends the CR message to or receives the CR message from the peer layer. | | End time | The SCCP layer receives the CC or CREF message from the peer layer, or the amount of time specified by the timer has elapsed. | | Timeout processing | The SCCP layer cancels the connection and notifies the upper layer. | Configuration Principle | Item | Description | | Basic principle | You can modify the timer value when the SCCP layer cannot receive the response from the peer layer within the time specified by the timer. In other cases, you are advised not to modify the timer value. | | Impact on the system | - Timer value < Default value: If the timer value is much smaller than the default value, the SCCP layer cancels the connection before receiving the response from the peer layer.
- Timer value > Default value: If the timer value is much greater than the default value, the SCCP layer waits for the response for a long time, increasing the usage of system resources.
- You are advised not to modify the timer value.
| | Recommended value | The default value is recommended. Unless otherwise specified, do not modify the timer value. |
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