# \#csma

**URL:** https://forums.digi.com/tag/csma/3123.md

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## [Xbee s2c zigbee](https://forums.digi.com/t/xbee-s2c-zigbee/17528)

<div class="topic-metadata">

**Author:** [@longo92](https://forums.digi.com/u/longo92)\
**Replies:** 1\
**Last updated:** [October 14, 2016, 2:45pm UTC](https://forums.digi.com/t/xbee-s2c-zigbee/17528 "2016-10-14T14:45:56Z")

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Hi, the xbee s2c with zigbee firmware uses slotted CSMA-CA(beacon enable) or uses unslotted CSMA-CA(no-beacon enable) in 802.15.4 MAC layer? Thanks