IP telephony connection

Better telephony with the toplink IP telephone connection

IP-based, high-performance telephone connections from toplink transmit voice communication with VoIP at high speed – securely encrypted and with excellent voice quality.

With the toplink SIP trunk you use IP telephony according to international standards.
Manage multiple numbers with a single access account. You can choose from three SIP packages according to your needs:

toplink SPI Business

Info Grafik zeigt schematisch wie der IP-basierte Telefonanschluss funktioniert - IP Telefonanschluss

Your benefits

  • Certified by several manufacturers
  • Encrypted telephony
  • Flexibility and scalability
  • Protection against fee abuse
  • toplink SIP Business for Skype

    Info Grafik zeigt die Funktion des IP Telefonanschlusses für Skype for Business - IP Telefonanschluss

    Your benefits

  • No media gateway
  • Full use of Skype for Business
  • Certified by Microsoft
  • toplink SIP Business for Teams

    Info Grafik zeigt die Funktion des IP Telefonanschlusses für Skype for Business - IP Telefonanschluss

    Your benefits

  • No media gateway
  • Full use of Microsoft Teams with VoIP capability
  • Protection against fee abuse
  • Flexibility and scalability
  • toplink SIP Business International

    Info Grafik zeigt die Funktionalität des internationalen IP Telefonanschlusses von toplink - IP Telefonanschluss

    Your benefits

  • International phone numbers
  • Available in over 60 countries
  • Emergency call function is supported
  • International porting of phone numbers possible
  • Accessories

    Session Border Controller (SBC)

    Use a Session Border Controller (SBC) to clearly separate your corporate network from the IP-based telephony world. Protect your business from threatening VoIP attacks.

    Your benefits

    • As a SIP firewall, the SBC performs a deep packet inspection and ensures that only proper SIP messages reach your network.
    • Simplified interoperability between SIP service providers and the manufacturer-dependent implementation variants of the SIP protocols of various IP-based telephone systems
      (using the implemented tools, the different formats of SIP messages can be adapted)
    • Best quality of the connection, regardless of the chosen form of communication, because sufficient bandwidth is always provided
    • The Network Address Translation (NAT) function automatically embeds IP addresses within SIP messages
    • Transcoding:
      • Codecs, e. g. conversion of G. 711 to G. 729 speech streams
      • Adaptation of various communication elements without common base (standards) that interact with each other, e. g. translation of the H.323 signaling in SIP functions


    For combining and connecting your ISDN telephone system with the required future IP technology.

    Would you like to contact toplink directly?

    You can reach us personally at:
    +49 6151 6275 0

    We will be happy to answer your e-mail inquiry under:

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