CompanyFlex SIP-Trunk

To be able to use a cloud-based telephone system from Telekom flexibly and independently of location, even with multiple teams, choose one of our CompanyFlex Cloud PBX tariffs. Depending on DSL availability at your location, you can use between 16 and 1,000 Mbit/s.

With these tariffs, you can even integrate your employees' work smartphones as mobile extensions.

For an existing telephone system or a local telephone system in general, use our CompanyFlex SIP-Trunk tariffs. Depending on the available Telekom DSL speed at your location, you can select up to 1,000 Mbit/s for your business Internet connection.

SIP trunking is comparable to a telephone connection based on a data line. It allows multiple individual or extension numbers to be operated in IP-based telephone systems with just a single access account. You can connect a stationary telephone system via SIP trunking.
Cloud PBX consists of a connection for telephony and internet, a cloud telephone system with functions for audio and video conferencing and messaging (message and data exchange). The functions can be used independently of location with all IP-enabled end devices such as laptops, smartphones or tablets. With CompanyFlex, the cloud-based telephone system is always included – even if you initially decide to use a stationary telephone system via SIP trunking – the Cloud PBX can be easily activated yourself at any time.

You are familiar with individual telephone numbers from your private life; they are the part of the telephone number that follows the area code. In contrast, extension numbers consist of a so-called number block, which can be used to dial individual terminals of a telephone system directly. A number block consists of a series of consecutive numbers that are appended to a base number. The first digits after the area code (base number) are always the same, and additional digits – the extensions – can be used to reach individual employees, fax machines, conference rooms, etc.

You can find more information on this in our guide article. "Success factor: type of telephone number".

Both Cloud PBX and SIP Trunk offer professional services for those who do not want to take care of the setup or administration themselves. In addition to an on-site analysis, installation workshops, installation services and training courses can be booked as required to ensure smooth setup and use. About CompanyFlex Services

The modular structure of CompanyFlex offers you exactly the services you need. You benefit from numerous add-on options such as parallel calls, flat rates, budgets, services that can be flexibly added or removed, as well as the consolidation of locations and cross-location concepts. CompanyFlex offers full flexibility because both forms of use, SIP trunk and CPBX, are also possible in a mixed form.

CompanyFlex offers the option of adding or removing parallel calls and other services such as flat rates or minute budgets at short notice. This allows the solution to be flexibly adapted to current business needs, and you only pay for what you currently require.

In CompanyFlex, you can integrate both individual numbers and extension numbers. Transferring existing numbers is just as easy as integrating new numbers.

With CompanyFlex, you are definitely well equipped for whatever comes your way! As the name suggests, this is a highly flexible offering for business customers. You can start with one location and a simple solution for making calls and surfing the internet, and then flexibly add services, locations, additional phone numbers, etc. as your business grows. The integrated cloud-based telephone system offers you particular flexibility – it can be easily adapted to your communication needs with just a click of the mouse.

Depending on the desired specifications, different costs will apply:

CompanyFlex Cloud PBX with a cloud-based telephone system including the Basic conference package, direct dial number, flat rate to German landlines and 18 other countries, and flat-rate internet is available from €57.90 per month. Additional locations, more phone numbers, extra options, etc. can be added flexibly.

CompanyFlex SIP trunk with direct dial number, flat rate to German landlines and 18 other countries, as well as flat-rate internet, is available from €54.95 per month. Additional locations, more phone numbers, extra options, etc. can be added flexibly. Thanks to the modular offering, you only pay for what you actually need. 

You can the CoFlex Configurator to quickly and without obligation put together a customised quote for your requirements.

In our guide article on Landline tariff comparison , we have compared the most important services offered by our company tariffs for you. 

Deutsche Telekom is committed to climate neutrality and recyclability. We source 100% of our electricity from renewable energies, which also promotes the sustainability of our partners. At Telekom, we value transparency for our customers and offer assistance in selecting landline tariffs and devices. We are committed to being a trusted partner in supporting our partners and customers on their journey towards sustainability. With the #GreenMagenta programme, we are committed to treating the environment responsibly and label certified sustainable products, services and initiatives. The use of cloud-based collaboration solutions and video conferencing reduces travel and emissions. The packaging of our routers is plastic-free and compostable, and rental models are reused. 

Yes. With the perfectly tailored speeds of 150 Mbps, 300 Mbps, 600 Mbps, 1000 Mbps and 2000 Mbps, you can get the most out of your CompanyFlex connection. You can simply select your preferred bandwidth in the online configurator .

A single misclick on a dubious link can halt projects and cause significant damage. Security OnNet Basic takes care of this for you: this network-based protection detects phishing, compromised websites, malware and botnet activity in the Telekom network in real time and blocks access before it reaches your end devices. You can continue working without any worries – no app installation, no maintenance, no IT resources required. Network-based cybersecurity reduces complexity and costs.

Protection against cybercrime is automatically activated when you use your PCs, smartphones and tablets with a Telekom landline connection. Your Internet speed remains unchanged. And best of all, Security OnNet Basic is included in many current business tariffs, including Business DSL, Business DSL Premium, Business Fibre Optics and CompanyFlex. This means that even start-ups, small businesses and medium-sized companies can easily benefit from cyber security.

Deepen your knowledge of cybercrime and strengthen your internet security with practical tips in the guide "Cybersecurity as a success factor". 

Are your employees on the move? Security OnNet Basic is also included free of charge in the Business Mobile tariffs and protects against dangers on the mobile Internet directly in our mobile network. Find out more .

Telephone connection based on an Internet data line for connecting a local telephone system.

Telephone system in the network – included as standard with CompanyFlex and can be activated at any time via the administration portal.

IP addresses ensure accessibility on the Internet based on the Internet Protocol (IP). Unlike postal addresses, IP addresses usually change with each dial-up connection (dynamic). Static = fixed IP addresses enable companies to network, for example, by connecting servers.

Internet connection that offers the same speed for uploading and downloading – in contrast to asymmetric connections, which allow information to be downloaded much faster than it can be uploaded.