Configuring VOIP (inode xDSL - Patton Smartnode - Agfeo AC12 USB)
A few days ago I had to configure the following setup:
Internet Provider: inode
Internet Modem: Zyxel Prestige 700series G.SHDSL modem
VOIP Gateway Router: Patton Smartnode 4552
Telephone Switchboard: Agfeo AC 12 USB
The VOIP setup didn't work at all, so I first checked if there is any DHCP
server around in the LAN. I deactivated the DHCP server (it wasn't used anyway,
all clients had designated IP addresses) and the VOIP Gateway was online the
first time (FYI: Most/All(?) inode VOIP gateways are configured to get a DHCP
address from the provider and if you have a local DHCP server that does not
support excluding MAC addresses from automatic address configuration you have to turn off your local DHCP server).
Afterwards I figured out, that some of the cables weren't connected to the correct
sockets, so here's an overview of the cabling setup:
POTS@wall -> Line@Zyxel_Prestige
LAN@Zyxel_Prestige -> LAN@Patton_Smartnode
Phone(BRI0/1)@Patton_Smartnode -> ISDN_S0@Agfeo_AC12
Afterwards, the Phone and LAN leds on the Patton Smartnode should indicate
the correct link status.
Now I was sure, that I correctly connected and configured my LAN but it still
So I called inode and they told me to call Agfeo and ask them if they need
on the ISDN line. And that was it. I called Agfeo (1,81€/min!!) and got
the information, that the Agfeo AC12 USB only works if configured with Point-to-Multipoint
Another call to inode followed where they switched the encapsulation to the
correct protocol and one reboot later, everything worked fine.
Well, maybe that doesn't sound very interesting, but I spent nearly three
hours to fix this problem, because before knowing anything about those
encapsulation protocols and their relevance in terms of VOIP I presumed the
misconfiguration to be on the Agfeo TK suite and tried to track down the
error on this side...
Note to myself: Learn some internals about VOIP...