Frequently Asked Questions

A PBX (Private Branch Exchange) is the system that manages phone calls inside a business: routing calls to the right person, handling hold music, voicemail, and extensions. A traditional PBX is a physical device installed on your premises, connected to phone lines from a telecom operator.

A Cloud PBX does exactly the same job, but the hardware lives in a data centre and you access it over the internet. There is no box to install, no engineer visit required, and no maintenance contract for physical equipment. You manage everything through a web interface.

No. Cloud PBX systems are designed for business owners and office managers, not IT specialists. Initial setup is handled by your provider. Day-to-day tasks such as adding a user, changing a call routing rule, or setting up voicemail are done through a web interface with no technical background required.

For more complex configurations such as multi-site setups or CRM integrations, your provider's support team handles the technical side.

A Cloud PBX scales from a single user to thousands of extensions on the same system. You add or remove users as your business changes, typically within minutes. There is no need to buy new hardware when you grow.

Most Cloud PBX providers offer plans that start from one user and scale incrementally, so you pay only for what you use.

In most cases, yes. If your existing desk phones support the SIP protocol (Session Initiation Protocol, the standard used by virtually all modern IP desk phones), they will work with a Cloud PBX. Your provider will supply the configuration settings.

If your phones are older analogue devices, an adapter (ATA, Analogue Telephone Adapter) can connect them to the Cloud PBX. Your provider can advise on compatibility before you switch.

Pricing varies by provider and the features included, but Cloud PBX is generally charged as a monthly subscription per user. Typical ranges in the Luxembourg and Greater Region market run from around 10 to 40 euros per user per month, depending on the feature set.

The total cost of ownership is usually lower than a traditional PBX when you factor in the absence of hardware, maintenance contracts, and on-site engineer visits.

This depends on the provider. Many Cloud PBX services have no setup fee and require no hardware purchase: you use a softphone app on your computer or smartphone. If you prefer physical desk phones, you either purchase them once or rent them from the provider.

Always ask for a full cost breakdown before signing, including any number porting fees, onboarding costs, or minimum commitment periods.

Contract terms vary. Some providers offer monthly rolling contracts with no cancellation penalty. Others require a minimum term of one or two years. Before signing, confirm the notice period, any early termination fee, and whether you can port your numbers out on cancellation.

Your phone numbers are yours. A reputable provider will not hold your numbers hostage if you decide to leave.

For most businesses, yes, particularly over a three to five year horizon. A traditional PBX requires upfront hardware investment, installation, ongoing maintenance, and eventual replacement. A Cloud PBX has none of those costs.

International call rates through a Cloud PBX are also typically lower than rates charged by local telecom operators, which can produce meaningful savings for businesses that call internationally.

Each simultaneous call requires approximately 100 kilobits per second (Kbps) of bandwidth in each direction. A standard business broadband connection handles this easily. For an office making 10 simultaneous calls, you need around 1 Mbps dedicated to voice, which any modern fibre or cable connection provides many times over.

The more important factor is stability and latency, not raw speed. A connection with low packet loss and consistent latency under 150 milliseconds delivers reliable call quality.

The three key metrics are latency, jitter, and packet loss.

Latency (the delay between speaking and the other person hearing you) should be below 150 milliseconds one-way. Jitter (variation in that delay) should be below 30 milliseconds. Packet loss should be below 1 percent.

Most business broadband connections meet these requirements. Problems usually arise from poorly configured routers, overloaded WiFi networks, or VPN configurations that add unnecessary delay. Your provider can run a pre-installation network test to confirm readiness.

Yes. VoIP call quality is directly affected by the quality of your internet connection. On a slow or congested connection you may notice echo, choppy audio, or dropped calls.

The solution is to configure Quality of Service (QoS) on your router, which prioritises voice traffic over other data. Most Cloud PBX providers include setup guidance for this. Switching from WiFi to a wired Ethernet connection also improves stability significantly for desk-based users.

No special hardware is required. You can use a softphone app on a computer or smartphone, a SIP-compatible desk phone, or both. Most Cloud PBX providers supply a web-based management portal that runs in any modern browser.

If your office has many users, a local session border controller (SBC) may be recommended by your provider for larger deployments, but this is not necessary for small and medium businesses.

Yes. This process is called number porting. Your existing phone number is transferred from your current operator to your new Cloud PBX provider. The number remains the same: your customers, suppliers, and partners will notice no change.

Number porting is a regulated process in Luxembourg and across the EU. Your current operator is legally required to release your number when you request a port.

In Luxembourg and the Greater Region, a standard number port typically takes between five and fifteen business days, depending on the current operator and the type of number (geographic, mobile, or non-geographic).

Your Cloud PBX provider manages the porting process on your behalf. During the porting window, your existing service continues to work normally. There is no gap in service.

Yes. A Cloud PBX provider based in Luxembourg can assign you a Luxembourg geographic number regardless of where your business is legally registered or where your team is located. This is useful for businesses that serve Luxembourg customers and want a local presence without a physical office.

The same applies in reverse: a Luxembourg-based business can obtain local numbers in Germany, France, Belgium, the UK, or many other countries through the same provider.

A well-managed migration runs in parallel: your new Cloud PBX is configured and tested before the number port is initiated. On the day of the port, calls begin routing through the new system. Your old system remains active until the port is confirmed.

Your provider should give you a clear migration plan with a timeline, a testing phase, and a rollback option if anything goes wrong. Ask for this plan in writing before you sign.

A reputable Cloud PBX provider secures voice traffic using encryption (TLS for signalling, SRTP for audio), protects the management portal with multi-factor authentication, and monitors for abnormal call patterns that could indicate fraud.

The main risks with VoIP are toll fraud (unauthorised use of your account to make calls) and eavesdropping. Both are mitigated by encryption and strong access controls. Ask your provider specifically what security measures are in place before committing.

It can be, but compliance depends on the provider and your own configuration. Under GDPR, call recordings and metadata (who called whom, when, for how long) are personal data and must be handled accordingly: stored securely, retained only as long as necessary, and accessible only to authorised personnel.

Choose a provider that processes data within the EU, signs a Data Processing Agreement (DPA) with you, and gives you tools to manage retention periods and access controls. Ask for the DPA before signing.

This depends on the provider. For businesses in Luxembourg and the EU, the preferred answer is that call data (recordings, call logs, voicemails) is stored in EU-based data centres. Some providers use infrastructure in the United States or other non-EU jurisdictions, which creates additional GDPR compliance obligations.

Always confirm the data residency location in the provider's terms of service or DPA before signing.

Yes, calls can be recorded through a Cloud PBX. Whether doing so is legal depends on the context and how you notify the other party.

In Luxembourg, recording a call without informing the other party is generally not permitted. The standard practice is to play an announcement at the start of a call stating that it may be recorded. For internal calls between employees, internal policies and employment law apply. Consult a legal adviser if you are unsure about your specific situation.

Responsibility is shared. The provider is responsible for the security of the infrastructure: servers, network, and platform software. Your business is responsible for access credentials, user account management, and how you configure the system.

Under GDPR, if personal data is compromised due to a provider-side failure, the provider may bear liability as a data processor. Your contract and DPA should define this clearly. Review the liability clauses before signing.

The most important factors are reliability (uptime guarantee and redundancy), support quality (response time, language, local presence), pricing transparency (no hidden fees), and data residency (EU-based infrastructure for GDPR compliance).

Beyond the basics, consider whether the provider offers number porting, international numbers, mobile apps, and integrations with tools you already use such as a CRM or Microsoft Teams. A local provider who understands the Luxembourg and Greater Region market can be a significant advantage.

It is not strictly required, but it has practical advantages. A Luxembourg-based provider understands local number formats, porting regulations, and the specific needs of businesses operating across Luxembourg, Belgium, France, and Germany. Support is available in the languages your team uses. Data is more likely to be stored within the EU.

For regulated industries such as finance or healthcare, a local provider may also be easier to include in compliance documentation.

An on-premise PBX is a physical device installed at your office. You own it, maintain it, and are responsible for updates and repairs. It gives you full control but requires technical expertise and ongoing investment.

A hosted (or Cloud) PBX runs on servers managed by your provider. You access it over the internet. The provider handles maintenance, updates, and redundancy. You pay a monthly subscription instead of a large upfront capital cost. For most small and medium businesses, hosted is the more practical and cost-effective choice.

Ask: What is the guaranteed uptime (SLA), and what compensation applies if it is not met? Where is my data stored? What is the notice period and cancellation policy? Are number porting and onboarding included in the price? What support channels are available, and in which languages? Can I test the system before committing?

Getting written answers to these questions protects you and helps you compare providers on equal terms.

You can manage it yourself. Cloud PBX systems are designed for non-technical administrators. Common tasks such as adding a new user, updating a call routing schedule, recording a new auto-attendant message, or resetting a password are all done through a web portal with no technical knowledge required.

For initial setup and any complex integrations, your provider's support team handles the technical work.

Through the web management portal. Adding a user typically takes under five minutes: you create the account, assign an extension, and the user receives login credentials by email. Removing a user is equally fast. There is no hardware to reconfigure and no engineer visit required.

Billing adjusts automatically: you pay for active users each month, so removing a user reduces your next invoice.

Yes. This is one of the strongest advantages of a Cloud PBX. Because the system runs in the cloud, physical location is irrelevant. A team member in Luxembourg, one in Brussels, and one working from home in Paris all share the same phone system, the same extensions, the same call groups, and the same voicemail.

Internal calls between locations are free and work exactly like calls between extensions in a single office.

Call history (logs of inbound and outbound calls) can usually be exported from your current provider's portal as a CSV or PDF file before you leave. Keep a copy for your records.

Voicemail recordings are typically stored on the provider's servers and may not be portable in a standard format. Download and save any important voicemails before initiating a migration. Ask your current provider for an export option before you give notice.

Yes. A Cloud PBX has no physical borders. Your team can be located in Luxembourg, Germany, France, Belgium, the UK, or anywhere else, and they all operate from the same phone system. Each user connects over the internet, so geography is irrelevant to how the system works.

This makes a Cloud PBX particularly suited to businesses with distributed teams, international clients, or offices across the Greater Region.

Yes. A Cloud PBX provider with international number coverage can assign you local numbers in many countries without requiring a physical presence there. You can have a Luxembourg number, a German number, a French number, and a UK number, all ringing on the same system and answered by the same team.

Local numbers significantly improve answer rates. Customers are more likely to pick up a call from a familiar local number than an unknown foreign one.

In most cases, yes. Cloud PBX providers route international calls over the internet (VoIP) rather than through traditional telephone networks, which reduces the cost significantly. Calls to destinations such as the United States, the United Kingdom, and the UAE are typically much cheaper per minute through a Cloud PBX than through a standard telecom operator contract.

For businesses that call these destinations regularly, the savings on call costs alone can offset a significant portion of the monthly subscription fee.

No. Any employee with an internet connection can use the Cloud PBX, regardless of where they are physically located. A sales representative in Dubai, an account manager working from home in Trier, and a receptionist in the Luxembourg City office all work from the same system with the same extensions and the same features.

This also means new hires in other countries are set up instantly, without waiting for a local SIM card or telco contract.

Without a Cloud PBX, a business operating in multiple countries typically needs a separate telecom contract in each country: one for Luxembourg, one for Germany, one for Belgium, and so on. Each contract has its own billing, its own support contact, and its own number range.

A Cloud PBX consolidates all of this into one system and one invoice. You manage numbers from multiple countries through a single portal, from a single provider. This reduces administrative overhead, simplifies billing, and removes the dependency on local operators in each market.

A regular mobile call travels over the mobile network (2G, 3G, 4G, or 5G) as a dedicated voice circuit between two phones, managed entirely by the mobile operators involved. The call quality and availability depend on the mobile network coverage at your location.

A VoIP call converts your voice into data packets and sends them over the internet, the same network used for email and web browsing. Call quality depends on your internet connection rather than mobile coverage. VoIP calls can be made from any device with an internet connection: a smartphone, a laptop, or a desk phone.

Each active call needs approximately 100 Kbps of bandwidth in each direction, which any modern internet connection provides easily. The more important requirements are low latency (below 150 milliseconds one-way), low jitter (below 30 milliseconds), and minimal packet loss (below 1 percent).

A standard home or business fibre connection meets these requirements comfortably. Problems are more likely to come from a congested WiFi network or a poorly configured router than from insufficient bandwidth.

Yes. VoIP is sensitive to network instability. On a poor connection you may experience echo, choppy audio, one-sided sound, or dropped calls. The most common causes are high packet loss, excessive jitter, or a router that does not prioritise voice traffic.

Configuring Quality of Service (QoS) on your router resolves most issues by ensuring voice packets are processed before other traffic. Using a wired Ethernet connection instead of WiFi also improves reliability significantly for office users.

Yes. A Cloud PBX softphone app works over any internet connection, including mobile data. On a strong 4G or 5G signal, call quality is indistinguishable from a WiFi call. On a weak 3G signal, you may notice reduced audio quality.

When you move between WiFi and mobile data mid-call, some Cloud PBX systems support seamless handover (continuing the call without interruption). Check with your provider whether this feature is available in their mobile app.

The call will be interrupted. Unlike mobile calls, which are managed by the network operator and can sometimes recover from brief signal drops, a VoIP call depends on a continuous internet connection. If the connection drops, the call ends.

On mobile data, switching from one cell tower to another typically does not interrupt a call, because the mobile network manages the handover. But if you move from WiFi to an area with no data coverage, the call will drop. Planning a reliable internet connection is therefore important for users who take many calls.

A softphone is a phone application that runs on a device you already own: a computer, a tablet, or a smartphone. It connects to your Cloud PBX account over the internet and gives you a full business phone, including your extension, call history, contacts, voicemail, and transfer capabilities, without any physical hardware.

Think of a softphone like a smartphone without a SIM card. On its own, the device can connect to WiFi but cannot make calls. Add a Cloud PBX account, and it becomes a fully functional business phone that can call and receive calls on your business number.

Yes. Installing your provider's softphone app on your personal smartphone turns it into a business extension. When a call comes in to your business number, it rings on your app. When you make outbound calls from the app, the recipient sees your business number, not your personal mobile number.

Your personal mobile number stays completely separate. Colleagues and customers only ever see your business identity.

You do not need a voice subscription, but you do need a data connection. A softphone makes calls over the internet: it needs either a WiFi connection or a mobile data plan (3G, 4G, or 5G) to function.

If you are always near WiFi (in the office, at home, in hotels), a data-only SIM or eSIM may be sufficient. If you travel frequently or work in areas with unreliable WiFi, a standard mobile data plan is recommended. The voice minutes on a traditional mobile contract become largely redundant once you switch to a softphone.

Yes. Your personal SIM and your Cloud PBX softphone app coexist on the same smartphone independently. Incoming calls to your personal mobile number ring as normal. Incoming calls to your business extension ring through the softphone app.

You choose which identity to use when making calls: your personal number (via the regular dialler) or your business number (via the softphone app). The two are completely separate.

Yes. As long as you have an internet connection (hotel WiFi, a local SIM with data, or international roaming data), your softphone works exactly as it does at home. Calls to your business number reach you anywhere in the world. Outbound calls show your business number to the recipient, regardless of where you are calling from.

This eliminates international roaming charges for voice calls entirely. Instead of paying roaming rates to your mobile operator, you use your regular Cloud PBX data allowance, which is the same wherever you are.