r/3CX

▲ 9 r/3CX

We are experiencing several PBXs (so far 120 over the 300 we manage) with unauthorized web logins and international calls. They are all different customers, different networks (some on site, some cloud), different SIP trunks, different logins, different admin passwords (all protected by IP filter and under logs there are no logins with those credentials), bruteforce and 3cx global blacklist active, on some calls didn't go through because there was the "allowed country filter" enabled, STUN disabled from day 1 (and port 5060 is closed anyway). Only thing we noticed it's that they are all old PBXs that were in past on v18 (but may be unrelated since v20 it's quite new and we have PBXs from 2017).
Does anybody else is experiencing the same?

From 3CX support we got the suggestion to enable verbose logs for at least 5 days (and in general we'll enable this by default to every PBX we manage, since basic 1 day logs, that i can recover via VM snapshots, look unuseful because they do not track anything.

Update 8th May: 3CX is escalating the ticket internally

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u/Clear-Step2393 — 8 days ago
▲ 2 r/3CX

Transitioned another building over today to 3cx. All went good, except one user that doesn’t care for the shared parking instead of blinking lights and noises from the Avaya Partner system it replaced when a call was placed on hold for Line 1,2, or 3.

Is there anyway to make shared parking audible when a call is parked?

Or would it be better to create a queue and a BLF button to send calls to that need picked up and put all users in the queue?

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u/f909 — 14 days ago
▲ 3 r/3CX

Hi all,

I have a CRM integration with our CRM system Autotask. In Autotask, all our customers are divided into several Departments, so that each customer is always supported by the same team.

My goal is to extend this setup to 3CX. Ideally, I want 3CX to recognize which Department a customer belongs to, so the call can automatically be routed to the correct Queue.

My idea was to create an AI Receptionist that asks for the company name and, based on that, transfers the caller to the appropriate Queue. However, I do not want to use the “Route by topic” feature for this, because that would require me to manually add and maintain every customer in the list.

The ideal scenario would be for the AI Receptionist to retrieve the Department via the CRM integration after the caller has mentioned the company name, and then route the call to the correct Queue. As far as I understand, this is not possible because 3CX can only perform CRM lookups based on the phone number.

Do you perhaps have any ideas on the best way to approach this?

EDIT: I have considered using a CFD, but this would mean that we need to have all our customers’ phone numbers filled in within Autotask. However, our customers call us from multiple phone numbers, sometimes even from personal mobile numbers.

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u/v1ct9r93 — 9 days ago
▲ 2 r/3CX

A customer is having intermittent 1 to 3 second audio delays on external voice calls. Internal calls seem to be fine. The issue is happening on both inbound and outbound calls. Total call volume is ~50 calls per day and about 25% to 30% of the calls are impacted. When I call their numbers from my cell phone, I can not recreate the issue. This installation was done about 3 years ago and was running without issue until 2 to 3 months ago.

The 3CX is cloud hosted (version 20.0.8.1121) with a 4 channel SIP trunk from siptrunk.com. There is a local Windows server that has the 3CX SBC (version 20.0.100) on it, the server has very low usage. There are 14 phones at the site, which are all registered to the SBC. The internet connection is 180 Mbps both ways and the usage is low. End users are all on Yealink T46U phones running the latest 3CX approved firmware.

I have turned on the connection quality monitor for all users and logged calls for 1 week. I had the customer record their experience with each call and matched their logs up with the connection quality monitor. For all calls, even the ones where the users reported audio delays, the round trip times are in the 50 to 80 ms range, the jitter is ranging from 3.5 to 7 ms, and the score is excellent for audio to/from the 3CX to the phone.

I need help figuring out my next troubleshooting steps. The 3CX is telling me the calls are good, siptrunk.com support is saying they don't see any issues on their side, but the users are experiencing frequent audio delays.

u/SirHandyMan — 9 days ago
▲ 3 r/3CX

3CX High Availability deprecated? help or options please

Location has 30 T23G's and not looking to replace with router phones.

I was attempting to set up 2 new identical Dell Mini's for use in a SBC High Availability Cluster (HA) to remove the single point of failure of the current SBC.

Question, what is everyone doing for redundancy, without deploying new router phones.

Here is the link to the instructions I was following:

https://www.3cx.com/docs/sbc-high-availability-cluster/

I tried to start the HA installation portion: (sudo bash -c "$(wget -qO- http://downloads-global.3cx.com/downloads/sbccluster/3cxsbc.zip)")

I wasn't able to get it to start, and used copilot to help figure out the issue.

According to copilot, HA was deprecated in 2023 and the download no longer contains the installer, and copilot instead suggests two other methods.

Is copilot correct? no more HA?

Below are the 2 methods suggested.

Method 1: DNS failover

Remote phones → sbc.company.com→ DNS → Active SBC

If the primary SBC dies:

  • DNS health check fails
  • DNS automatically switches the hostname to the secondary SBC
  • Phones re-register to the new IP

Cons

  • Not instant (30–90 seconds)
  • Phones must re-register

Method 2: Dual SBC Provisioning -

Phones can be provisioned with two SBC addresses:

  • Primary SBC
  • Secondary SBC

If the primary fails, the phone automatically tries the secondary.

How it works

  • Configure two SBCs in 3CX
  • Provision phones with both
  • Phones fail over automatically

Pros

  • No DNS required
  • Fast failover (phone-driven)
  • Works even if DNS is down

Cons

  • Not all phone models support dual SBC entries
  • Must be configured in provisioning templates
  • Still no shared state between SBCs

thanks in advance for any responses.

u/Yes-WeCanDoThat — 5 days ago
▲ 0 r/3CX

Bonjour,

Je souhaite passer les certifications basics et advanced de 3CX. La certification basics en première position. Je souhaite avoir une référence de plateformes interactives où je pourrais retrouver les contenus de cours, des quiz type certification pour bien me préparer en dehors de la 3CX académie.

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u/lokadi17 — 8 days ago
▲ 1 r/3CX

Hi-- I am trying to connect my new Twilio SIP trunk with a new 3CX SMB. I entered the Account SID and Auth Token successfully, as I was able to see the DID number that I just purchased on the next screen. However, I get stuck at the following screen--I enter a name for the new trunk, and there is no ability to select an option to "limit" the trunk to, so I just select "--" (support docs say to select "System Wide"). I keep getting this Bad Request error. I did not see anything in the support docs around this. Any idea what I am missing?

Screenshot attached.

https://preview.redd.it/vp2tu2jcnxyg1.png?width=1923&format=png&auto=webp&s=8f6ecaaa666c0efba5de16a54e085d7e2a938beb

Thanks!

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u/rsokhi — 11 days ago
▲ 3 r/3CX+2 crossposts

Hi everyone, I'm currently working on a project focused on audio quality monitoring, and I need to integrate HOMER with the 3CX platform. Has anyone here already done this or worked on a similar setup?

I’d really appreciate any guidance, tips, or feedback. Thanks in advance!

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u/UrsulaWagner — 8 days ago
▲ 1 r/3CX

Bonjour,

C'est quoi exactement et de façon concrète la différence entre un groupe d'appel et une file d'attente ?

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u/lokadi17 — 8 days ago
▲ 1 r/3CX

Getting wallboard data for custom dashboard?

We have been using Jed-ware for a few years and it has been great. We like the reporting and the wallboard. However...we need to consolidate to a SINGLE TV screen to show service desk AND call metrics (User status in a queue, calls waiting, wait time, and call volume) as on one wallboard.

I see "Data Connectors" allows me to get the CDR data to sync to my own database, so I can get the call details just fine. But for the stuff that Jed-ware shows us I assume that requires the Call Control API?
Is this doable? I hate having to do all the work to re-invent this, but I am not sure there is another way.

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u/Hey_this_guy_here — 4 days ago
▲ 1 r/3CX

Can't seem to register T48S into pbc

I have just taken a over a small install with 6 T48S phone & 3cx cloud hosted. Everything works fine "as is" except I can't seem to be able to add another phone into the setup.

There is NO sbc - direct connect (I know this is not recommended setup but it has worked for them for the past 4 years from v18 to current v20u8).

The phone has lattest firmware, factory reset. I gets the provisioning info from the PBX (On the 3cx side I get Provisioning file for MAC 805EC0A**** of user 859 requested by 85.*.*.* was successfully generated and the various account fields are populated correctly in the web interface) but it never registers - on the phone side it alternates between "registering" and "registration failed". I can't seem to find more logging as of what is failing on either side (might welcome advices as of what to enable).

Any help most welcome - muss be a pretty easy one...

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u/alextakacs — 4 days ago
▲ 2 r/3CX

Get more details when Hosted 3cx goes down?

New to Hosted 3cx, but it seems like the service stops and restarts more often than I would like.

Is there anyway to get more details about these service restarts?

I assuming they are Linux updates running in the background? Or is the 3cx software tripping out?

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u/f909 — 4 days ago
▲ 2 r/3CX

Hi All,

I have a customer with a load of fanvil x210-v2 phones. There is one user that has a strange issue - despite all users having:

Default Ringtone: Default
Queue Ringtone: Ring 2

One user in particular has a different ringtone when his phone rings with a queue call. I've defaulted the phone and reprovisioned it, and put the latest fw on, and it makes no difference. Any ideas please?

TIA!

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u/ac1977 — 6 days ago
▲ 0 r/3CX

3CX SBC Mémoire saturée

Bonjour,

Nous avons une vingtaine de clients impactés par des perturbations sur leurs appels téléphoniques, (coupures, grésillements...). Et quand nous regardons les performances du SBC cela est autour de 96%, ce qui est énorme. Le fichier qui prend 91% de la RAM est le 3cxsbc. Evidemment avec cette utilisation, l'accès à distance est impossible.

Nous avons trouvé une solution qui a l'air de tenir pour la plupart. Sur le routeur nous avons désactivé l'ouverture de port en 5060 pour le SBC, car de toute façon rien n'est filtré en sortie et il n'a besoin que du 5060 pour la sortie. Et ensuite, demander au client de redémarrer l'équipement SBC. Ensuite, le SBC ne remontra plus autant en utilisation de la mémoire.

Nous pensons peut-être à des robots qui font des requêtes sans suite et donc le SBC répond sans avoir de réponse et attend sans fin.

Cordialement

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u/Imaginary_Cookie_957 — 2 days ago
▲ 3 r/3CX

3CX License Question

client has 6 staff & 6 IP Phones - what plan is best suited for this? Given that 3CX SMB is winding down, and basic free does not support ip phones, is the only choice a 8SC Basic plan for $300 per year?

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u/whereisbenny — 1 day ago