Enable Landline calls via FON1 RJ11 plug in Fritzbox 7360

Installing and Using OpenWrt
1

MY existing Modem has an RJ-11 port that is able to accept and send phone calls via SIP. But due to VDSL disconnection problems I plan to switch into a FritxBox 7360 v2 that I bought for cheap in Ebay.

I manages to setup the VDSL connection in the router but I also want to enable the phone functionality as well. As my existing router, Frtizbox also has a FON1 RJ11 Jack and I want to use it in order to perform phone calls.

My duckduckgo-fu led me to owisp but I find no information regarding on how to install it. So do you know how I can enable phone calls via RJ-11 that pass through SIP protocol?

2

Does your equipment run OpenWRT?

3

Yes it runs as you can see bellow:

# cat /etc/os-release
NAME="OpenWrt"
VERSION="SNAPSHOT"
ID="openwrt"
ID_LIKE="lede openwrt"
PRETTY_NAME="OpenWrt SNAPSHOT"
VERSION_ID="snapshot"
HOME_URL="https://openwrt.org/"
BUG_URL="https://bugs.openwrt.org/"
SUPPORT_URL="https://forum.openwrt.org/"
BUILD_ID="r17264-774b386a92"
OPENWRT_BOARD="lantiq/xrx200"
OPENWRT_ARCH="mips_24kc"
OPENWRT_TAINTS=""
OPENWRT_DEVICE_MANUFACTURER="OpenWrt"
OPENWRT_DEVICE_MANUFACTURER_URL="https://openwrt.org/"
OPENWRT_DEVICE_PRODUCT="Generic"
OPENWRT_DEVICE_REVISION="v0"
OPENWRT_RELEASE="OpenWrt SNAPSHOT r17264-774b386a92"
4

In general, you'd need asterisk and chan_lantiq (which is not trivial to set up properly) on lantiq vr9 devices. …but AVM might have done a rather custom FXS design, not necessarily supported by chan_lantiq, you'd need to test it (I'm not too hopeful though).

5

First things first, I want to see whether FON1 can accept signals or not. Is there some soft of a script to do so?