Actually I use a 7490 router Avm, with proprietary software which is near to EOL, but works perfect with this cable
This cable is a Y cable, one plug go to phone, one other to internet (I don't know why is voip they use this configuration, I think voip use the standard vdsl port).
I want to know something
The FritzBox 7530 router (compatible with openwrt) will work for voip?
Do you know a good solution for use a voip router vdsl supported by openwrt?
Thanks
I had no problem with Asterisk, even by cli (i never used the http interface, cli rulez )
I only don't understand how can asterisk can reach the provider. Can I connect the router to a single port (the vdsl port) and then configure asterisk on Openwrt or separate pc?
You have DSL, either ADSL or VDSL There are only a few OpenWrt compatible routers with DSL hardware built in. Most DSL customers here run a two box solution with a DSL modem provided by the ISP, which converts the DSL signal to Ethernet packets, and their own router running OpenWrt.
If the phone service is on the same wires in the wall that is not VOIP, it is POTS (Plain Old Telephone Service). The DSL signals are a higher frequency than the phone audio, so they can share the same wires. The phone must have a filter installed in the line to the phone which prevents the DSL signal from being heard, as it sounds like noise. This is the little "splitter box."
Is not pots, is VOIP, I know it because I have connected and successfully registered an asterisk server with voip provider of ISP. I never understand why they use a "2 port wallsocket".
Is not a dsl is a fttc 30mb (they (isp) call it a 100mb but 100 is only in their fantasy)
"There are only a few OpenWrt compatible routers with DSL hardware built in."
OK then the device in between the phone and the wall would be a "Home Gateway" which combines a DSL modem and a VoIP ATA (Analog Telephone Adapter). Generally if you are using the ISP's bundled phone service you have to use their included gateway as they won't give you the credentials to set up your own ATA.
64 MB RAM, which is does not meet minimum system requirements (RAM) for OpenWrt going forward
16 MB flash, and asterisk + chan_lantiq is on the big side, so fitting that into the ~15 MB flash available on this device is going to be very difficult right now (e.g. I'm already at 14.3 MB at the moment) and going to be impossible within months
only 100 MBit/s ethernet ports
not-good 2.4-GHz-only wireless
the SOC remains to be very much on the slow side
the devices are roundabout 15 years old (so components are at the end of their life-span)
their primary operators have decommissioned them over half a decade ago already
system specs are not favourable for OpenWrt going forward
Is it possible, right now (on several non-AVM lantiq vr9 devices), yes - if you manage to set up asterisk+chan_lantiq correctly and securely (which is far from an easy task on its own).
Is it sensible, hell no<imagine a slew of exclamation marks here>.
The cable (note the image does not show easily) implies that the phone might have been using ISDN in the past. That asterisk server was living inside your home network? Because then any recent enough FritzBox might be pressed into service as VoIP/SIP basestation inside your network...
Likely historic reasons at one point in time telephone was coming separately from dsl and then having multiple sockets can be quite nice.
FTTC is likely either vdsl2 or maybe g.fast, this is mostly trying to dress up dsl behind a hint of fibre...
You can run asterisk on those AVM devices, but there is currently no way at all to get the FXS (analogue phone ports), ISDN or DECT functionality working on OpenWrt-on-AVM, making the prospect of running asterisk on them much less sensible (as there'd be much faster/ cheap hardware to run OpenWrt+asterisk if you don't need any of those ISDN/ FXS/ DECT features anyways).
)