My phones lose their registration and don't restore it on their own

Important! The solutions described here will likely only apply to you if all of the following conditions apply to your setup:

You are using the device with Easybell’s Cloud PBX.
You are using the registrar pbx.easybell.de.
You are using encrypted telephony (TLS).
You are using devices from Grandstream, snom, or Yealink.

You can easily fix the error yourself by either adjusting your device’s configuration or simply updating the firmware to the latest version.

Below, you’ll find a brief explanation for each manufacturer, along with additional links.

Grandstream

On Grandstream devices, the DNS-SRV settings must be adjusted. You can find the instructions here: Using Grandstream Phones with an Encrypted Cloud PBX. The relevant information can be found under “6. Network Settings.”

snom

Your device requires firmware version 10.1.175.10 or higher. If this is not the case, please perform a firmware update via the phones' web interface.

If your device is connected via ACS, you can also reset it to factory settings. The latest firmware will be installed automatically when the device restarts.

Yealink

You'll need to adjust the SIP and proxy server settings on your device.

If the device is configured via ACS, simply restarting the device is sufficient.

If the device is configured manually, please set it up according to our instructions: Setting Up Encrypted Calling with Yealink in the Cloud PBX. You can find the relevant changes in the sections “3.2 Setting Up the SIP Server” and “3.3 Outgoing Proxy Server.”

Name	Purpose	Lifetime	Type	Provider
CookieConsent	Saves your consent to using cookies.	2 year	HTML	Website
_pk_id	Used to store a few details about the user such as the unique visitor ID.	13 months	HTML	Matomo
_pk_ses	Short lived cookie used to temporarily store data for the visit.	30 minutes	HTML	Matomo
fe_typo_user	Assigns your browser to a session on the server.	session	HTTP	Website
order_session	Availability Check	12 hours	HTML	Website
order-available	stores Availability Check result	12 hours	HTML	Website
easybell-locale	Stores your selected country and language so the website is shown with the correct localization.	1 month	HTML	Website

Name	Purpose	Lifetime	Type	Provider
_clck	Persists the Clarity User ID and preferences, unique to that site is attributed to the same user ID.	1 year	HTML	Microsoft Corporation
_clsk	Connects multiple page views by a user into a single Clarity session recording.	1 day	HTML	Microsoft Corporation
CLID	Identifies the first-time Clarity saw this user on any site using Clarity.	1 year	HTML	Microsoft Corporation
ANONCHK	Indicates whether MUID is transferred to ANID, a cookie used for advertising. Clarity doesn't use ANID and so this is always set to 0.	10 minutes	HTML	Microsoft Corporation
MR	Indicates whether to refresh MUID.	7 days	HTML	Microsoft Corporation
MUID	Identifies unique web browsers visiting Microsoft sites. These cookies are used for advertising, site analytics, and other operational purposes.	1 year	HTML	Microsoft Corporation
SM	Used in synchronizing the MUID across Microsoft domains.	session	HTML	Microsoft Corporation
_uetsid	Microsoft Bing Ads session identifier for conversion tracking	1 day	HTML	Microsoft
_uetvid	Microsoft Bing Ads visitor identifier for remarketing	13 months	HTML	Microsoft
MUIDB	Mirrors MUID across Microsoft/Bing domains for ad tracking	1 year	HTML	Microsoft
_uetmsclkid	Used by Microsoft Advertising to track user interactions and improve ad targeting.	1 year	HTML	Microsoft
_fbp	Used by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers	3 months	HTML	Facebook
fr	Ads targeting cookie for Facebook	3 months	HTML	Facebook
_fbc	Stores Facebook click identifier (fbclid) for ad attribution	90 days	HTML	Facebook
datr	Facebook cookie that identifies browsers for security, fraud prevention, and ad delivery	2 years	HTML	Facebook
AnalyticsSyncHistory	This cookie is set by LinkedIn. Used to store information about the time a sync with the lms_analytics cookie took place for users in the Designated Countries	30 days	HTML	LinkedIn
UserMatchHistory	LinkedIn Ads ID syncing	30 days	HTML	LinkedIn
bcookie	Browser Identifier cookie to uniquely identify devices accessing LinkedIn to detect abuse on the platform. For more information about LinkedIn cookies, please navigate to https://www.linkedin.com/legal/l/cookie-table.	1 year	HTML	LinkedIn
bscookie	Used to remember a user's language setting to ensure LinkedIn.com displays in the language selected by the user in their settings	1 year	HTML	LinkedIn
lang	Used to memorize a user's language setting.	session	HTML	LinkedIn
li_sugr	Used to make a probabilistic match of a user's identity outside the Designated Countries	90 days	HTML	LinkedIn
lidc	To facilitate data center selection.	24 hours	HTML	LinkedIn
li_fat_id	Stores LinkedIn click identifier for ad attribution	30 days	HTML	LinkedIn
lms_ads	Identifies LinkedIn members for ad targeting	30 days	HTML	LinkedIn
lms_analytics	Identifies LinkedIn members for analytics	30 days	HTML	LinkedIn
li_gc	Stores LinkedIn guest consent for cookies to ensure privacy choices are respected	6 months	HTML	LinkedIn
li_mc	LinkedIn marketing conversions cookie for audience matching and analytics	6 months	HTML	LinkedIn
li_oatml	Identifies LinkedIn members outside LinkedIn for advertising and analytics	1 month	HTML	LinkedIn
liap	Indicates if a non-WWW domain can access a LinkedIn member's ID for tracking and advertising	1 year	HTML	LinkedIn
_guid	Used to identify a LinkedIn Member for advertising through Google Ads	90 days	HTML	Google
_gcl_au	Used to measure ad and campaign performance and conversion rates for Google ads on a site visited	90 days	HTML	Google
_gcl_aw	Used through Google Ads to understand user interaction with the site and advertising	90 days	HTML	Google
_gcl_dc	Used through Google Campaign Manager and DV 360 to understand user interaction with the site and advertising	90 days	HTML	Google
test_cookie	Checks whether browser accepts third‑party cookies so Google can deliver personalised ads	15 minutes	HTML	Google
IDE	Google DoubleClick cookie used for delivering targeted advertisements and measuring ad effectiveness	13 months	HTML	Google
DSID	Google DoubleClick cookie that links user identity across devices for personalised advertising	2 weeks	HTML	Google
RUL	DoubleClick cookie used to determine if ads have been displayed correctly and for remarketing	12 months	HTML	Google
_ga	Used to distinguish users.	2 years	HTML	Google
_ga_GLPLJDP6G8	Used by Google Analytics to distinguish users.	2 years	HTML	Google
_gid	Google Analytics session identifier that distinguishes users	1 day	HTML	Google
__cf_bm	Bot management / protection	1 year	HTTP	Website

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