How to Connect Gigaset CL660HX via Gigaset Box 100 to Sunrise Connect Box 3?

Lepolak · 2025-05-06T19:45:10+00:00

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Lepolak

Hi all,

I have a Gigaset CL660HX handset and a Gigaset Box 100 (DECT base station). I’m trying to connect this setup to my Sunrise Connect Box 3 via the TEL port, but nothing happens — no signal, no registration, and the handset won’t connect.

Frankly, I’m quite disappointed that the newer Sunrise router seems to offer fewer telephony functions than older models — especially the lack of DECT or direct VoIP handset support.

Is the TEL port on the Sunrise Connect Box 3 automatically active, or do I need Sunrise to enable it?
Is the Box 100 compatible in this setup (analog signal through TEL)?
If not, what kind of phone or base station do I need to connect to this router to make and receive calls — ideally using VoIP?
Can I still use my CL660HX if I switch to a Gigaset GO-Box 100 and configure VoIP with Sunrise SIP credentials?

Thanks in advance for any help or advice!

Xydocq

hello Lepolak

Welcome to the community.

You should be fine with the Gigaset Box 100. Analog phones should work fine with the Connect Box 3.

TEL Port 1 is the one port working, TEL Port 2 is just there for the looks.

You will have to check if Telephony is activated on your connection. To do so, sign in to the Connect Box 3. The information will be shown on the welcome page.

If it shows off, you will have to call 0800 707 707 and request your telephony to be activated. Keep in mind, not every contract comes with telephony out of the box.

From what I know, Sunrise doesn’t provide SIP credentials for HFC (Cable-TV) connections. Without knowing what type of internet connection you have, I can’t comment on the Gigaset Go-Box.

Lepolak

Thanks for the quick reply!

I just checked — telephony is shown as active in the Connect Box 3 interface.

The Box 100 (https://www.galaxus.ch/de/order/146150159) is connected to TEL Port 1, but unfortunately it’s still not working:

The handset won’t register.

There’s no dial tone or incoming call signal.

Is there anything else I should try to get the Box 100 working?

Or could this indicate a compatibility issue or faulty device?

Thanks again for your help!

Xydocq

Lepolak

It could be a faulty device.

After doing some research, the Gigaset GO-Box should work too. I use a Gigaset E630A-GO. It runs on “hybrid” mode.
For calls it’s connected to the analog port. The internet-connection is used for caller identification. The GO Box seems to support the same setup. So there’s no real need for the SIP credentials.

Lepolak

Thanks for the follow-up — that’s very helpful! I have returned my current faulty Gigaset Box.

So if I understand correctly, the GO-Box 100 (like the one included with the E630A-GO) can indeed run in a hybrid setup:

Analog calls go through the TEL port on the router.

The Ethernet connection is used for caller ID, time sync, firmware updates, etc.

Just to clarify:

In this hybrid setup, do I need to connect the GO-Box 100 to both TEL and Ethernet, or is the Ethernet optional if I only want basic analog calling?

Can the Ethernet connection enable caller ID and similar features even if I’m not using VoIP?

Would switching to full VoIP (with SIP credentials) let me skip the TEL cable entirely and rely only on Ethernet?

And lastly, does anyone know if Sunrise provides SIP credentials for Internet fibre user like me?

Appreciate the clarification and wish a happy night!

Xydocq

Lepolak

The answer to all your questions is yes.

All your conclusions are spot on.

Unfortunately I wasn’t able to find the english manual for the GO Box but here’s the pic of the wiring.

I am not sure if Sunrise will provide the SIP credentials, you have to call 0800 707 707 and ask for the credentials.

Lepolak

Thanks for your help, I have ordered a box and will let you know if doesn’t work! Happy evening!