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The Gigaset pro Interoperability Program is designed to test Gigaset pro PBXs when connected to ITSP (Hidden) (Service Provider) SIP Trunks. If you are missing local Providers you can contact the local Technical Sales Representative in your country.

SIP Trunking for Gigaset PBX Systems

Select your country for a list of ITSPs which have been tested for Gigaset pro Interoperability:

Link to tested providers

Country
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Country	Number of providers tested
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