SIP Trunking


SIP trunks are telephone line trunks delivered over IP using the SIP protocol. Using this standard protocol, telecom service (VoIP) providers connect one or more channels to the customer’s PBX. Phone numbers and DIDs are linked to the SIP trunk. In many cases numbers can be ported to the SIP trunk.

With a Voicetec SIP Trunk you can inexpensively connect to our telephony platform SIP enabled phone system, gateways from Patton, Mediatrix, Fritzbox usw. etc. Voicetec is based on RFC Standard, certified for use with various telephone companies.

A link to an IAX-Trunk is also possible. InterAsterisk eXchange (abbr. IAX) is a protocol that is used by the Open-source system Asterisk. It serves both the connection between individual Asterisk servers as well as for communication devices, through which Voice-over-IP calls are possible.

What do you get?

  • Voicetec SIP Trunk with unlimited talk channels
  • Backup routing; redirect any number to any (e.g. mobile) phone number
  • myPhone platform for easy administration and call overview
  • Per-second billing computation without connection charges
  • Most affordable call rates freely definable from five rate plans
  • Convenient monthly subscription and phone billing
  • The used T38 protocol guarantees seamless fax communication
  • Voicetec provides the redundant telephone infrastructure for high availability
  • Partial and complete transferring of existing numbers


Lower monthly Line & DID Rental

The monthly fee to have a number of lines installed at your office drops significantly with SIP trunks. And DIDs cost a lot less.

Move offices and keep the same number

SIP trunks are not bound to a location, so it’s easy to move offices without having to change your stationary or inform your customers. There is no longer any need to pay to forward phone calls to the new offices.

Eliminate VoIP Gateways

SIP trunks will eliminate the need to buy and manage VoIP Gateways. All phone calls come in via IP. No extra conversion often means better quality too.


 It is easy to add channels to your SIP trunk to cope with increased calls. A simple phone call will allow you to add channels, and often this can be done immediately. Compare that to the delay in having additional lines installed and then having to upgrade your old PBX to handle more lines!

Better customer service

Provide better customer service by adding more geographical and international numbers. Quickly and easily add numbers to your SIP trunk and terminate them on your IP PBX – you can give customers more options to dial in at a significantly lower cost. Customers can contact you more easily and sales will increase.

Lower call charges

There are many SIP trunk providers and competition has driven down call charges significantly. Some SIP trunks even come with unlimited calling.

Leverage a modern IP PBX

Modern IP PBX / Unified Communications solutions will give customers increased productivity, mobility and boost sales. Connecting an IP PBX to SIP trunks is much easier than via the PSTN.

Correct number of channels

With SIP trunks, you can easily choose the correct number of channels that you need. Using ISDN/T1, you often have to choose to add either 15 or 30 lines. This usually means you end up with expensive extra capacity.


  • Voicetec SIP Trunk
  • Numbers: 1 number
  • Numbers: block of 10
  • Numbers: block of 100
  • Voicetec Fax Box
  • External Voicetec Voice Box
  • Conference per room
  • Transferring analog number*
  • Transferring ISDN Number*
  • Transferring DDI Number*
  • one-time
  • 150.00
  • 2.00
  • 20.00
  • 120
  • 10.00
  • 10.00
  • 10.00
  • 39.00
  • 49.00
  • 449.00
  • monthly
  • 15.00
  • 1.40
  • 12.00
  • 57.00
  • 2.50
  • 5.00
  • 0.00
  • 0.00
  • 0.00
  • 0.00
*Transfer date selectable for any weekday
All prices in CHF exclude 8% tax

Offer Request

  • 5 + 81 =


Jack Semper
Human Resources

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor a nean massa.

Kim Dennis

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa.

Jane Travis

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa.

    Etiam magna arcu, ullamcorper ut pulvinar et, ornare sit amet ligula. Aliquam vitae bibendum lorem. Cras id dui lectus. Pellentesque nec felis tristique urna lacinia sollicitudin ac ac ex. Maecenas mattis faucibus condimentum. Curabitur imperdiet felis at est posuere bibendum. Sed quis nulla tellus.


    63739 street lorem ipsum City, Country


    +12 (0) 345 678 9