# SMS Event Documentation Unclear

**URL:** <https://forum.sierrawireless.com/t/sms-event-documentation-unclear/903>\
**Category:** Documentation feedback\
**Created:** [November 30, 2006, 4:25pm UTC](https://forum.sierrawireless.com/t/sms-event-documentation-unclear/903 "2006-11-30T16:25:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [November 30, 2006, 4:25pm UTC](https://forum.sierrawireless.com/t/sms-event-documentation-unclear/903/1 "2006-11-30T16:25:55Z")

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Reference: ADL User Guide for Open At v3.03, Rev 001, Dec 2005.

The description of the SMS Event Handler does not explain the distinction between ADL\_SMS\_EVENT\_SENDING\_OK and ADL\_SMS\_EVENT\_SENDING\_MR.

It says they both mean “SMS Message was sent successfully”, but one has the message reference, and one doesn’t.

In my system, it seems that ADL\_SMS\_EVENT\_SENDING\_MR is always received first, followed by ADL\_SMS\_EVENT\_SENDING\_OK.

Is there any case when only one could be received, without the other?

Is there any case when they could be received in the other order?