# X-Bee XB ZB assosiation problem

**URL:** <https://forums.digi.com/t/x-bee-xb-zb-assosiation-problem/14711>\
**Category:** XBee & XBee Gateway\
**Tags:** out, of, communiaction, router, xbee\
**Created:** [April 16, 2015, 7:59am UTC](https://forums.digi.com/t/x-bee-xb-zb-assosiation-problem/14711 "2015-04-16T07:59:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vinaykumar](https://avatars.discourse-cdn.com/v4/letter/v/34f0e0/32.png) [@vinaykumar](https://forums.digi.com/u/vinaykumar)\
**Post date:** [April 16, 2015, 7:59am UTC](https://forums.digi.com/t/x-bee-xb-zb-assosiation-problem/14711/1 "2015-04-16T07:59:36Z")

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We have X-Bee pan of 25 devices all are configured with 23A7 routers some of X-Bee routers all of sudden not responding till hard power reset

What might be the reason could anyone help me out on this.

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [April 21, 2015, 9:08am UTC](https://forums.digi.com/t/x-bee-xb-zb-assosiation-problem/14711/2 "2015-04-21T09:08:41Z")

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You need one of them to be a Coordinator in order to establish a network.

The routers you need to reset, what are they connected to?