# \#rejoin

**URL:** https://forums.digi.com/tag/rejoin/2136.md

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## [router won't rejoin](https://forums.digi.com/t/router-wont-rejoin/19004)

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**Author:** [@alanp](https://forums.digi.com/u/alanp)\
**Replies:** 2\
**Last updated:** [December 22, 2017, 12:53pm UTC](https://forums.digi.com/t/router-wont-rejoin/19004 "2017-12-22T12:53:12Z")

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I have a Zigbee PRO S2C coord. and Zigbee PRO S2C Router. FW ver 4060 on both units. All works fine until I emulate a radio network failure (shield coord antenna). I wait until router assoc Led stops blinking before rem…

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## [NJ commands on routers and coordinators](https://forums.digi.com/t/nj-commands-on-routers-and-coordinators/14844)

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**Author:** [@alanp](https://forums.digi.com/u/alanp)\
**Replies:** 3\
**Last updated:** [May 12, 2015, 8:11am UTC](https://forums.digi.com/t/nj-commands-on-routers-and-coordinators/14844 "2015-05-12T08:11:30Z")

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Hi Forum, I am a little confused by the methods around NJ command. I set NJ to 0xFF while I configuring end devices on network. If I want to "lock my network I set NJ to 0 on the coordinator. Is it necessary to also …