# Asterisk Hints to Devices located on other PBX

**URL:** <https://community.asterisk.org/t/asterisk-hints-to-devices-located-on-other-pbx/74661>\
**Category:** Asterisk Support\
**Created:** [May 16, 2018, 3:44pm UTC](https://community.asterisk.org/t/asterisk-hints-to-devices-located-on-other-pbx/74661 "2018-05-16T15:44:55Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![randallbacon](https://avatars.discourse-cdn.com/v4/letter/r/2acd7d/32.png) [@randallbacon](https://community.asterisk.org/u/randallbacon)\
**Post date:** [May 16, 2018, 3:44pm UTC](https://community.asterisk.org/t/asterisk-hints-to-devices-located-on-other-pbx/74661/1 "2018-05-16T15:44:55Z")

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I’m looking to find a way to leverage asterisk hints that could subscribe to device states located on another PBX (primarily Cisco Unified Communications Manager 9x+). I’ve tried implementing a test-example between two distinct Asterisk servers connected via registered SIP trunks, but the hints (example: 1001,hint,SIP/asterisk1/${EXTEN}) did not result in getting a successful device state despite hints/subscriptions that stay within the local context work just fine.

I am asking the community if (1) this is a possibility altogether, and if there were some examples one could provide, or (2) there was a better to way to perform device state subscriptions to other SIP-based PBXs.

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**Author:** ![johnkiniston](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/johnkiniston/32/28_2.png) [@johnkiniston](https://community.asterisk.org/u/johnkiniston)\
**Post date:** [May 16, 2018, 3:55pm UTC](https://community.asterisk.org/t/asterisk-hints-to-devices-located-on-other-pbx/74661/2 "2018-05-16T15:55:29Z")

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You can share device state between two Asterisk PBX’s using res\_pjsip, I think it was introduced with Version 15

[https://wiki.asterisk.org/wiki/display/AST/Exchanging+Device+and+Mailbox+State+Using+PJSIP](https://wiki.asterisk.org/wiki/display/AST/Exchanging+Device+and+Mailbox+State+Using+PJSIP)

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**Author:** ![randallbacon](https://avatars.discourse-cdn.com/v4/letter/r/2acd7d/32.png) [@randallbacon](https://community.asterisk.org/u/randallbacon)\
**Post date:** [May 16, 2018, 3:56pm UTC](https://community.asterisk.org/t/asterisk-hints-to-devices-located-on-other-pbx/74661/3 "2018-05-16T15:56:23Z")

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@johnkiniston, I’ll poke around in there. Any experience with non-asterisk PBXs?

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**Author:** ![johnkiniston](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/johnkiniston/32/28_2.png) [@johnkiniston](https://community.asterisk.org/u/johnkiniston)\
**Post date:** [May 16, 2018, 4:12pm UTC](https://community.asterisk.org/t/asterisk-hints-to-devices-located-on-other-pbx/74661/4 "2018-05-16T16:12:53Z")

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I don’t believe it’s possible to exchange device state with non asterisk PBX’s.