The Gigaset SL450A GO can be connected to the Swisscom Internet Box (router) and you can use it to make calls. However, to take advantage of all the benefits of the Swisscom Internet Box when making calls, you need special HD handsets from Swisscom. Recommendation: be sure to seek advice from Swisscom before buying to avoid making a wrong purchase!

I am using a Gigaset SL450 A GO on the analogue telephone connection of the UPC Connect Box. This works perfectly. In addition, I have connected the Ethernet port of the phone to the Internet, although I do not use Internet telephony (6 providers would be possible). As a result, the numbers of the calls are looked up on Search.Ch and immediately shown on the phone's display.

You can then "mute" it if you do not want to accept the call.

I bought this phone and use it with the SIP Peoplefone. The phone works via DECT and not via Wifi, it is only connected to the network and receives an IP.

You can check compatibility with other Gigaset handsets on this Gigaset page. https://www.gigaset.com/de_de/cms/service/kompatibilitaet/produkte/compatibility.html#product1=75

I had a silver SL450H in it.

The note "Power adapter: No" is meant differently. It is intended to indicate whether the unit comes with a foreign power plug and therefore requires an adapter or not.

Yes these devices are compatible.

Each Nobik handset has its own address book with 500 entries. These address books can be loaded from the PC and also transferred between the handsets.

Ja, gemäss Bedienungsanleitung Seite 76, Link: https://gse.gigaset.com/fileadmin/gigaset/images/CustomerCare/Manuals/SL4xx/SL450_GO/A31008-M2721-B101-2-19_de_AT-DE-LU.pdf

I have the box from UPC. It works without any problems. Just plug it in and wait about 2 - 3 minutes. Have fun Haiggi

Yes, this is possible (1x landline and another 6 Voip connections).

Voilà: Gigaset SL450 HX

I can only confirm what Eldorado2 replied to you. I have connected the phone to the upc connect box and it works perfectly. Have a nice day

Is this phone compatible with an SL400 ? (NOT SL450) Sorry !

Yes

Das wäre folgendes Produkt: Gigaset SL450 HX

Is not Skype certified

According to Gigaset Support, only the individual number is blocked and not entire number ranges.

It is possible with the DECT of the Internet box or, depending on the firmware, directly via the internal SIP access of the Swisscom router. However, most of the support people at Swisscom don't really know about this function (yet) and don't provide any support anyway because it's not Swisscom hardware. So you have to be familiar with SIP.

Unfortunately, we can't answer this question for you, as we haven't been able to try this out in such a form, but I'll be happy to enter it in the community, perhaps a user can help you :)