The Resend Request <2> message is sent by either side to initiate the retransmission of messages. This function can be used if a sequence number gap is detected or if either side lost a message or as a function of the initialisation process.
| Tag | Field Name | Required | Comments |
|---|---|---|---|
| Standard Header | Yes | MsgType <35> = 2 | |
| 7 | BeginSeqNo | Yes | Sequence number of the first message in range to be resent |
| 16 | EndSeqNo | Yes | Sequence number of last message in range to be resent. Set EndSeqNo to 0 if all messages subsequent to BeginSeqNo are required |
| Standard trailer | Yes |