# PMP 450i don't received any SMs

**URL:** <https://community.cambiumnetworks.com/t/pmp-450i-dont-received-any-sms/109150>\
**Category:** PMP\
**Created:** [November 2, 2026, 8:33am UTC](https://community.cambiumnetworks.com/t/pmp-450i-dont-received-any-sms/109150 "2026-11-02T08:33:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![heshamelhoseny](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/h/c67d28/32.png) [@heshamelhoseny](https://community.cambiumnetworks.com/u/heshamelhoseny)\
**Post date:** [November 2, 2026, 8:33am UTC](https://community.cambiumnetworks.com/t/pmp-450i-dont-received-any-sms/109150/1 "2026-11-02T08:33:33Z")

</div>

I have PMP 450i v20.0.1 connected on CMM 4 and received from SMs PMP 450 reflector v20.0.1 after reconnect it in Cnmatrix I can’t see any SMs.

I don’t change any configuration!

What’s the problem?

Note , I add new PMP 450i version 20.3.1.2 on the same CNMATRIX