FRAME_RETRANSMISSION_TIMEOUT

Required? No
Keyword Type Unsigned number
Default 3
Range 1–60
Multiples Allowed? No, only one for each PORT_X25_SPECIFIC_DATA parameter
   FRAME_RETRANSMISSION_TIMEOUT = (
      @TYPE = UNSIGNEDNUMBERKEYWORD
      @RANGE = 1,60
      @DEFAULT = 3
    )

The FRAME_RETRANSMISSION_TIMEOUT parameter specifies the milliseconds allowed for a response to a frame. If a response is not received within the specified number of milliseconds, the frame is transmitted again. The value that you type in this field is the one provided by the network supplier when you subscribed to the network.

The value is an integer in the range 1–60.

This parameter is optional. The default is 3.

If you want to determine your own retransmission timeout value, consider the maximum amount of time it takes for:
  • A frame to travel to the data circuit terminating equipment (DCE) from the data terminal equipment (DTE)
  • DCE processing
  • A response frame to return to the DTE from the DCE

Frame retransmission speed depends on the link speed and the frame size. Maximum frame size is related to the maximum packet size. If you do not allow enough time, a response can not be received. If you allow more than enough time, line connection costs increase because excess time passes before a frame is transmitted.