I am ashamed to say that years have passed and I have done little about sorting voip out properly. I have failed to get voip working directly into a box on the lan, too befuddled and too much pain to debug it, and it may be that voip through a multi-line bonded dsl link isn't viable anyway for all I know, especially given that the upstream is very ‘odd’ in performance terms as one line is quite a bit faster upstream than the other two [12-15%], for some reason, also my chosen huge interleave imposes sizeable latency.
I have a Siemens N300 VoIP box which I got from AA, my ISP. AA staff would definitely be up for sorting it out but I just don't have the stamina or the tools. I'm not 100% sure if I have the firewalling correct for it. I've read the requirements carefully several times but I may have missed something. I think I did get this bit right because an earlier Siemens box, same model, did sort-of work in the distant past, but was not reliable. I think it was perhaps possible that it would fail when the network was loaded with other traffic, which if true is very very bad, lack of proper QoS marking or handling. For some reason, I ended up with a replacement box, can't remember why. The second one never worked, just completely fails 100%.
My questions:
* Has anyone got voip working properly over dsl?
* Does it work even when the network is loaded flat out?
* Got a slow link?
* Has anyone tried and failed to get voip working at all? Or got something that half works?
* Anyone out there with line bonding?
The problem is that it's just to easy to leave things unfinished. I can simply use AA’s redirect facility where they reroute calls to Mrs Weaver’s mobile phone over the normal phone network. I don’t think Mrs has noticed any audio quality or reliability problems with such a half-voip (or less; half voip at the very most) system. So because that is good enough and she has voice mail anyway if her mobile has no signal, then there is little motivation to summon up the energy and restart the gruesome attempt to get full 100% voip going via the Siemens box. I’m so full of pain drugs these days that everything seems to be in a spin.
Router: I am aware that Firebrick routers have special directives in their config now for VoIP support, but I have never used these. I don't know why they are needed, perhaps something to do with NAT mitigation? I have zero NAT. If there is more to it and they must be used because of say QoS or something to do with special firewalling exceptions then I should be using these voip directives and maybe that is why nothing works. But people used to manage ok somehow before Firebrick software upgrades brought these new voip-awareness directives, and my config is from that era, so I'm just guessing that NAT users are the people who really need this new config technology.