# Cisco SIP Phone conference not working after update firmware on Asterisk

**URL:** <https://community.asterisk.org/t/cisco-sip-phone-conference-not-working-after-update-firmware-on-asterisk/73623>\
**Category:** Asterisk Endpoints\
**Created:** [February 22, 2018, 9:45am UTC](https://community.asterisk.org/t/cisco-sip-phone-conference-not-working-after-update-firmware-on-asterisk/73623 "2018-02-22T09:45:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![arshad.hussain](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@arshad.hussain](https://community.asterisk.org/u/arshad.hussain)\
**Post date:** [February 22, 2018, 9:45am UTC](https://community.asterisk.org/t/cisco-sip-phone-conference-not-working-after-update-firmware-on-asterisk/73623/1 "2018-02-22T09:45:42Z")

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Hi Everyone,

Good day!..

I would be really appreciate you as you already configured Cisco 79xx series phones with **CONFERENCES** , recently we have implemented asterisk and we have configured 7962,7931 Cisco Phone **SIP firmware via TFTP** everything are working fine except conferences.

My humble request you to all that could you please help me out on this.

Please waiting for your kind response.

Thank you in Advance.

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**Author:** ![jcolp](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/jcolp/32/8848_2.png) [@jcolp](https://community.asterisk.org/u/jcolp)\
**Post date:** [February 22, 2018, 10:44am UTC](https://community.asterisk.org/t/cisco-sip-phone-conference-not-working-after-update-firmware-on-asterisk/73623/2 "2018-02-22T10:44:02Z")

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You haven’t provided enough information - such as how they are connecting to Asterisk. Are they using SIP? Are they using SCCP?

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**Author:** ![arshad.hussain](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@arshad.hussain](https://community.asterisk.org/u/arshad.hussain)\
**Post date:** [February 22, 2018, 11:27am UTC](https://community.asterisk.org/t/cisco-sip-phone-conference-not-working-after-update-firmware-on-asterisk/73623/3 "2018-02-22T11:27:49Z")

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Jcolp Thank you for your reply.

I am using SIP firmware on the following cisco phone model.  
All are connected and working fine just not working on conference.  
6921, 7962, 7931, 3905.