# 865/868 MHz (API)Communication Test

**URL:** <https://forums.digi.com/t/865-868-mhz-api-communication-test/16662>\
**Category:** XBee - Zigbee\
**Tags:** 868lp, xbee\
**Created:** [April 27, 2016, 8:10am UTC](https://forums.digi.com/t/865-868-mhz-api-communication-test/16662 "2016-04-27T08:10:03Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Manoj\_kumar](https://avatars.discourse-cdn.com/v4/letter/m/ecd19e/32.png) [@Manoj\_kumar](https://forums.digi.com/u/Manoj_kumar)\
**Post date:** [April 27, 2016, 8:10am UTC](https://forums.digi.com/t/865-868-mhz-api-communication-test/16662/1 "2016-04-27T08:10:03Z")

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HI,  
i working with XBEE S8 868MHz and configured module as coordinator in API mode with Encryption,and under this coordinator i configured 100-150 nodes(API), now all nodes are in network.my questions are

1. To form a network with 100-150 nodes it’s take much time approx 15-20 mins initially.
2. i am not getting response from all nodes when i given request in broadcast mode.
3. Getting response like 60/100,80/100(broad cast mode).
4. Uni cast it is working 100%.there is a no issue in uni cast.

pls solve my issues… 🙂

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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 27, 2016, 1:15pm UTC](https://forums.digi.com/t/865-868-mhz-api-communication-test/16662/2 "2016-04-27T13:15:51Z")

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Increase your MT value. Also decrease the amount of messages you are sending.

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<div class="post-metadata">

**Author:** ![Manoj\_kumar](https://avatars.discourse-cdn.com/v4/letter/m/ecd19e/32.png) [@Manoj\_kumar](https://forums.digi.com/u/Manoj_kumar)\
**Post date:** [April 28, 2016, 10:36am UTC](https://forums.digi.com/t/865-868-mhz-api-communication-test/16662/3 "2016-04-28T10:36:54Z")

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Where i can change the MT value in coordinator or in Router side.

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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:** [April 28, 2016, 10:40am UTC](https://forums.digi.com/t/865-868-mhz-api-communication-test/16662/4 "2016-04-28T10:40:35Z")

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You increase MT on the Coordinator or Multi-point base side.