This issue is now resolved.

We have now identified the cause of the issue, however, all campus-based desk phones have again been signed out, and will need to be signed back in by our resolver teams.

We will provide further updates as soon as possible.

Earlier this morning, we identified that all Yealink branded desk phones had signed out, and required a manual sign-in. Our resolver teams are currently working through all the affected devices to get them back up and running as quickly as possible.

We will provide further updates as soon as possible.

We are investigating an issue affecting Teams desk phones (Yealink, etc).

We will provide further updates as soon as possible, and apologize for any inconvenience.

Due to this issue affecting the Security phone line, please use the following numbers to contact Security: 07866206211 or 01225383999.