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About sipcall

Backbone Solutions AG was founded in 1998 and offers professional and high-quality solutions for connectivity and Internet telephony (VoIP).
In 2005, Backbone Solutions AG was one of the first providers in Switzerland to launch the voice-over-IP service sipcall, which subsequently developed into one of the leading providers of innovative Internet telephony services.
sipcall offers comprehensive VoIP telecommunication solutions for professional use for small to large companies and private individuals in Switzerland and Austria.
In close cooperation with leading telematics companies, sipcall realizes successful telecommunication services such as sipcall virtual pbx, the flexible telephone system in the sipcall cloud for SMEs and much more.
To date, over 40,000 customers have opted for a sipcall telephony solution.

See below for a list with supported features when using the Gigaset PRO IP Devices on the providers network.


DE310 / DE410 IP


DE700 / DE900 IP

N510 IP

     N720 IP


Maxwell 3,Basic,

Maxwell 10

Software Version MR55-6
Porta One 11 July 2018 tested with :

Software release:  02.00.0402.00.0742.24570.1111752.

Basic CallYesYesYesYesYesYesYes

Calling line (CLIP)YesYesYesYesYesYesYes

Connected line (COLP)NoNoNoNoNoNoNo

Anonymous callYesYesYesYesYesYesYes

Do Not DisturbYesYesNoNoNoYesYes

Message waitingNoNoYesYesYesYesYes

Call list/historyYesYesYesYesYesYesYes

Voice mail deposit/retrievalNoNoYesYesYesNoYes

Call waitingYesYesYesYesYesYesYes

Call Hold / ToggleNoNoYesYesYesYesYes

Call forward (CFU)NoNoYesYesYesYesYes

Call forward (CFNR)NoNoYesYesYesYesYes

Call forward (CFB)NoNoYesYesYesYesYes

Call Transfer attendedYesYesYesYesYesYesYes

Call Transfer unattended (Blind)Yes*Yes*YesYesYesYesYes

Completion of Calls to Busy Subscriber (CCBS)--NoNoNoNoNo

DTMF (RFC2833)YesYesYesYesYesYesYes

Conference 3ptyYesYesYesNoYesYesYes

BLF Busy / Idle indicationNoNoNoNoNoYesYes

Session Audit--No-NoNoNo

Call pick-up direct  ( * 8 extension)NoNoNoNoYesYesYes

Call pick-up group ( * 8 )NoNoNoNoYesYesYes

Call pick-up BLFNoNoNoNoNoYesYes

Call completed elsewhereNoNoNoNoNoNoNo

Auto provisioningNoNoNoNoNoNoNo

UDP / TCP protocol


Central Phonebook

For unattended transfer the DE310/DE410 requires Firmware 02.00.04 or higher and DE700/DE900 requires firmware 02.00.07 or higher.

And Voip Settings -> Unattended call transfer set to Semi-attended

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