# Digi XBEE 3 ZigBEE 3 Router Not Joing Cooridnator Network

**URL:** <https://forums.digi.com/t/digi-xbee-3-zigbee-3-router-not-joing-cooridnator-network/38044>\
**Category:** XBee - Zigbee\
**Created:** [December 3, 2025, 4:48am UTC](https://forums.digi.com/t/digi-xbee-3-zigbee-3-router-not-joing-cooridnator-network/38044 "2025-12-03T04:48:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Khyaati](https://avatars.discourse-cdn.com/v4/letter/k/258eb7/32.png) [@Khyaati](https://forums.digi.com/u/Khyaati)\
**Post date:** [December 3, 2025, 4:48am UTC](https://forums.digi.com/t/digi-xbee-3-zigbee-3-router-not-joing-cooridnator-network/38044/1 "2025-12-03T04:48:14Z")

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I am trying to communicate between **2 modules of Digi Xbee 3 Zigbee 3 (SMT Micro Module)**

I am facing the following problem:

1. Module 1: Set as Coordinator  

2. Module 2: Set as Router

The Router is unable to join the Coordinator network. We have doubted and tried to work on the following:

1. Antenna: Changed and Checked
2. Antenna Proximity: Brought the two extremely close and yet not working ( Although 13db Output Power)
3. Changing Channels
4. Changing Transparent and API modes
5. SC Channels: Gave Specific Scan Channels
6. Tried DigiMesh Communication with Default Settings.

We have been unable to connect the two and its necessary fo rthe 2 to communicate on a particular channel.

Please guide and help.

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<div class="post-metadata">

**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:** [December 3, 2025, 12:43pm UTC](https://forums.digi.com/t/digi-xbee-3-zigbee-3-router-not-joing-cooridnator-network/38044/2 "2025-12-03T12:43:10Z")

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Try setting the NJ time on the Coordinator to 0xFF. Then issue an ATNR0 to the router.