Perfect to work remotely: use mobiles with your PBX

Mobile PBX

Central-SIM Mobile

Everything you do with a PBX but with your mobile lines and both in the office and at home

full mobility

Remote work: Answer phone calls from everywhere

You will be able to answer phone calls from your business phone number in your mobile line as if it was a fixed extension. And with no extra charge.

SIM card mobile PBX

Get by without buying and setting up fixed devices

You will get SIM cards to use on mobile phones to use both as a regular mobile line and a PBX extension.

telefonía móvil GSM

Forget about the need of Internet connection and apps

Mobile lines don't work over Internet connection and you ensure best voice sound quality everywhere at any time.

How do mobiles work with Central-SIM PBX?

Central-SIM with Mobile lines

1 fixed number

New or portabiliy

3 mobile lines

New numbers or portability | Unlimited phone calls | 4G data: 2GB - 4GB - 6GB - 10GB

PBX features on your mobile lines

No Internet connection or use of apps needed

Incoming PBX phone calls | Transfer phone calls | Call divert | Full mobility | Short extension number


Voice greetings | automated days and hours | IVR option menu | Initial set up

We help you grow with professional telephony. From:


Main features you get

  • Fixed phone number
  • Lines & Simultaneous phone calls
  • Greeting messages
  • Music on hold
  • Queues
  • Workind hours & days & holidays
  • Voice2mail
  • Call transfer
  • Smart call forwarding rules
  • Online full PBX dashboard
  • Mobile plans with with 4G and unlimited phone calls

Premium features

  • Call recording
  • Virutal fax
  • Smart IVR
  • Fiber Internet
  • International phone numbers
  • Automated surveys

What do our customers think about us?

Totem Abogados & Asesores

""Good phone service with an efficient and resolute customer service at a great price."

VAT not included

Central-SIM compatible phone extensions

Central-SIM allows you to select and combine different types of phone extensions to use the one that fits best each employee.


Telsome mobile with the plan you select.
We send you the SIM card to use on your smartphones


Receptionist phones with speed dial, transfer and BLF. Plug&Play


VoIP phones to be used in the office.
Regular and cordless phones. Plug&Play

What is the Mobile pbx

The mobile PBX is a hosted PBX where mobiles work as phone extensions.VoIP phones can also be used. Mobiles don't use Internet connection for the phone calls.

  • The mobile PBX manages phone calls and diverts them to the fixed or mobile extensions.
  • Mobile lines can be called directly using the mobile phone number and they can get incoming calls from the PBX.
  • Mobiles can transfer phone calls, divert them, get phone calls from the PBX and much more.

How do mobile extensions work?

They work as a mobile line

As with your current mobile plan, you get a SIM card to insert in your smartphone. Once you turn it on you get phone line, with a mobile phone number and 4G data.

They work as a PBX extension

As with a regular desktop phone extension, your mobile has a short phone number your colleagues can call you to, you get incoming calls from your PBX and you can even transfer them. It works just as a fixed phone extension.

Benefits of using the Mobile PBX

You can move while talking+ info

  • You will be able to stand up, walk, look through the window or whatever you want while talking on the phone as you will be cordless.

Answer phone calls while being out of your desk+ info

  • If you go out of your desk you will still be able to answer phone calls.

Use bluetooth headsets+ info

  • Almost every smartphone, if not all, include bluetooth and you will be able to use your phone extension with headsets at the best price and talk while having your hands free.

No set up required + info

  • You will just have to insert the SIM card to have the phone extension working on your smartphone.

Automatically divert phone calls to mobile extensions+ info

  • The mobile PBX can manage phone calls to divert them to the right person even if it's in a mobile phone. This saves lots of time to the enterprise and to customers.

Great voice quality+ info

  • As it does not rely on your Internet connection you will have the best sound quality even if there is no Internet at all.

Whatsapp+ info

  • Employees will have their own enterprise Whatsapp account to talk with customers.

The Mobile PBX is perfect for these enterprises

Enterprises with sale agents

  • Enterprises with sale agents or employees working in mobility, such as real state, logistics, delivery and others get huge advantage over their competitors by combining mobiles and PBX and helps them save lots of money by unifying everything.

Enterprises with warehouse or similars

  • In enterprises with warehouse is usual to have to go to the warehouse, and also warehouse managers must be available by phone extension. With mobile PBX people from the office will be able to move to the warehouse with no need of pausing the call; and warehouse managers will be always available.

Enterprises with bad Internet connection

  • Fiber Internet connection is still not available everywhere, and enterprises that don't have access to it can now use a PBX and manage several phone calls by using a professional PBX that does not rely on the Internet connection.

Enterprises looking for simplicity

  • Mobile extensions do not require configuration, we all know how to use an extension and you can carry your mobile extension with you in your pocket and talk while you move. The same as cordless phones but with many more benefits.

Frecuently asked questions

What does it include?

By default it includes a fixed phone number (new or portability), full hosted PBX Central-SIM, mobile plans you select with triple cut SIM card; y PBX set up so that you don't have to worry about anything.

Which network does it use?


Is it free to get incoming calls in the mobile?

Yes, getting phone calls from your PBX on your mobile phone is free.

Do we need Internet connection for phone calls

No, you don't need Internet connection to talk on the mobile phone.

Fixed and receptionists extensions do requiere Internet connection.

How many extensions can we use on the Central-SIM PBX?

As many as you need; and at least 3 fixed ones or 1 mobile extension.

What do we need?

You just need smartphones. We will send you the SIM cards and you will get them in 2-3 days since buying the service.

Can we use any smarpthone ?

Yes, if you can use it with another mobile operator you can use it with use and the Central-SIM mobile PBX.

Why should I buy a mobile PBX?

Because you will be able to:

  • Answer phone calls from out of your office
  • Use any mobile as a phone extension
  • Use a PBX even if you have a bad Internet connection

How long does it take to have it working?

  • 2-3 days with new phone numbers
  • Around five day with portability. If you port your mobile lines we will send you the SIM cards and, once you have them, we will start with the portability. This way you ensure you don't change of company before getting the SIM Cards.
  • Use a PBX even if you have a bad Internet connection

How do I start?

Contact us on 900 908 999, by email or using any contact form

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