I need DSL-router (integrated modem) recommendations for my ISP:
Up to 16 Mps download speed and 1 Mbps upload speed included
The following specifiations are needed:
ADSL2+ (ITU G.992.5 Annex B)
The flashing of the router should be very easy (no soldering, no pin wiring) and the router should should be cheap and useable for at least next two years. Also it should be available on german second hand market.
If possible, it would be nice, if the router is able to also handle Annex J (it is an upgrade option for up to 2.8 Mbit/s Upload).
At the moment, to all intents and purposes, OpenWrt has exactly one modem chipset family it supports, the Lantiq XRX200. And any of the devices will work fine for you, they are easily able to deal with a 16/1 line. As for Annex-J, it should be no problem either, I'm just not entirely sure why you would pay for marginal updates to the oldest technology they offer, and not just go for a proper VDSL line. Is it availability at your place?
The thing with all the OpenWrt-supported modem routers is: They are fine as modems, they are utterly mediocre at everything else because at the end of the day, they are based on technology that is now more than a decade old. And with the notable exception of one model (the BT Home Hub 5A that you'd have to import from the UK) Wifi capabilities range from "meh" to "borderline unusable".
So it very much depends what else besides basic connectivity you expect from your router. Speaking from own experience it may even be worthwhile to separate the modem and the router into two or even three devices, depending what you expect from CPU and Wifi (all of them can be driven by OpenWrt).
That excludes the aforementioned BT Home Hub 5A, and I believe most of the TP-Link Wx9x0 models.
I would probably suggest the FritzBox 3370, just for the fact that it comes with at least somewhat usable 5GHz Wifi. And from what I see it only costs a song and a dance on German "ebay Kleinanzeigen".
While the bthub5 would be a perfect match for a VDSL connection (as there are sellers for pre-flashed devices), the need for ADSL with Annex B hard-excludes this device, as it's Annex A only (the annex doesn't matter for VDSL, but it does for ADSL).
Sadly the number of devices with lantiq vr9/ xrx200 and decent specs (flash/ RAM size), as well as good (and supported!) wireless isn't that great. While the FritzBox 3370 is technically dual-band capable (and well supported/ easy to flash), it only has a single radio - so you'd have to decide between either 2.4 GHz XOR 5 GHz: the 3490 would technically be a better option (but that's not supported yet, while there are patches to get it working, you'd need to be very affluent to get/ keep that working; so a strong recommendation against this or the 7490 as well; also skip the easybox 904 xDSL, due to its very 'moody'/ unsupported RaLink iNIC wireless).
This is a rather hard set of criteria to meet. As written above there is essentially only one well supported DSL-SoC Lantiq's xrx200 and that is getting long in the tooth for anything but pure bridged modem duties (now at your ADSL speed you might get away with not noting that unless you start to install and use CPU intensive packages).
In your shoes I would probably try to get my hands on a recent FB 7520 and try to install the work-in-progress build discussed in:
No idea about how well this does ADSL (newer DSL modems tend to get optimized for VDSL duty so ADSL might be limping along) but at least the CPUs should not hold you back too badly. But that is neither a stable built and I have no experience how easy it is to install in the first place (plus "cheap" for a 7520/7530 is still a bunch of EUR).
Once you have a build, the installation is as simple as with other AVM devices. There seem to be a few 7530 variants that do not work (slightly changed hardware), but the 7520s should work fine. I have no experience with ADSL on these boxes, only VDSL.
For the one ADSL line that we had until a year ago, I went for an external modem - a cheap ISP-branded modem I got used for <€10,-
Any OpenWrt router with ethernet WAN interface (essentially all) will do. (ONe potential caveat would be an ISP that requires PPPoA only, ppp over atm, but that is not the case in Germany so not an issue for you).
That depends on what kind of modem you use for ADSL, most modem-routers built in the last decade are mixed ADSL/VDSL devices, so if you choose your modem wisely, upgrading to VDSL2 is not going to be an issue HOWEVER if you envision switching to VDSL2 profile 35b (sold under the moniker "super-vectoring" in Germany with speedgrades of either 175 or 250 Mbps) you will need to buy a super-vectoring modem. (In which case you will need something like a speedport smart, a fritzbox 7520/7530/7590 or 1&1 (HomeServer)/O2 (HomeBox 3?)'s equivalent device; neither of these are supported by mainline OpenWrt yet).
About the router, you will be able to combine any OpenWrt router with any "modem" of any technology (be it docisis/cable, dsl/copper, gpon/fiber, ...) whether the router is powerful enough for a given speedgrade is a different question. E.g. it is easy to find a cheap router capable to saturate an ADSL link, but say 1000/50 Mbps docsis, a 1000/200 Mbps gpon, or a 8.6/8.6 Gbp xgspon link will put considerably higher demands on the router's CPUs. (But that does not affect whether a router can be used, but only whether the contracted speed can be reached).
Easybell.de is fine*, but 1&1 and O2** also offer contracts with short duration (and according to the current TKG contracts will automatically switch to month-by-month cancel-ability after 24 months IIRC).
Fair enough, your choice. In the "great business acumen" set, I think tal.de is also worth mentioning, albeit they only offer 24 month contracts and are on the pricy side of things.
*) Actually their "no bull shit" approach of offering no obfuscating rebates and short cancel-ability is IMHO really nice and a show of confidence in their product; only ISPs that are not confident to keep customers by simply offering an attractive product need "tricks" like 24 month contract duration...
**) I am with O2 with month-by-month cancel-ability and so far have nothing to complain, their VoIP was a bit tricky to set-up, but since I only needed to do that once not a big deal.
Unless you're looking at super-vectoring 'really soon™' (as in, constructions already underway), just go with a plain (vr9 based?) (plain-) VDSL/ vectoring (up to profile 17b/ 100/40 MBit/s) modem, as they're pretty much available for a song (5-20 EUR used; starting around 40 EUR new) - and just get whatever you need, when you actually need it (really, a used one is fine). Given the prices for pre super-vectoring hardware, it makes no sense to pay extra in preparation, just in case or 'for the future' - the future might change quicker than you think (it's more likely to see new ftth deployments, than new super-vectoring outdoor DSLAMs).
There is the rumor that super-vectoring generation (ex-lantiq) modems have lower noise (better analog components?) performance and tend to get higher upload-sync (on VDSL2 links) than previous generations, but sure the second hand prices for say a FB7520 seem to start around 50 EUR considerably higher than xrx200 modems...
I don't doubt that, but we're still looking at a current need for ADSL2+ - and for that, 50+ bucks for a super-vectoring capable device would be a waste, if you can get vectoring capable ones for a fiver.
While I was on ADSL2+ (until 2017), I was well suited with a lantiq AMAZON ME 'modem', bought for a tenner as 'used' (actually NOS, still shrink wrapped, from freenet's portfolio, a Samsung SMT-G3200) - worked well for most of a decade.
Well in that case probably something like a speedport entry 2 (or a Zyxel VMG1312-B30A) that can be configured as bridged modem and that can be gotten cheaply might be an attractive option. (The entry 2 and theVMG1312-B30A only have 100Mbps ethernet ports so will not be able to fully saturate a 100/40 VDSL2 link at full-sync (116.6/43), but it will get close enough to be serviceable for anything short of profile 35b). I am sure here are older dsl-routers available for less money, but the challenge is to figure out which:
a) support Annex J (not strictly necessary as dslam-ports will fall back to Annex B, but IMHO getting 2.5 Mbps uplink instead of 1 Mbps makes a noticeable difference, so this is the one thing I would look out for, if I had to purchase something)
b) can be configured as true bridged modems (I assume many can, but not necessarily in a straight forward way)
Thank you all for your opinions, I went with the Fritzbox 3370 for around 10€ and after some hassle with a broken ethernet cable and figuring out how to flash it, it finally works like a charm ... more info for flashing here: