Thanks for your answer. 2010/2/3 Sebastian Robitzsch <[email protected]>: > Hi John, > > Please find some hints in line ... > > John Doe wrote: >> Hi, >> >> I want to build a pbx and wifi router based on the soekris net5501 >> (together with its standard case), a tdm400 card and a mini-pci wifi card. >> This box should be 100% reliable, 24x7, as its going to be in a >> different part of the world, in fact I will build 2 or 3 of these and >> have them in different countries. >> >> I'm planning to have 2 fxo and 2 fxs modules on the tdm400. >> I know that having fxs modules require additional power for the phones >> to ring, I have researched a bit into this and some people seem to use >> the JP15 power connector for this, but there is no definitive statement >> that this actually works. >> I would appreciate it if anybody in this list has a similar solution and >> would like to share his experience. >> >> On the wireless side I'm thinking about getting a CM9 (802.11 a/b/g) or >> a R52n mini-pci (802.11 a/b/g/n) card. >> 802.11n doesn't seem to be well supported in Linux yet, but I expect >> this to change soon. > > I don't know what you mean by "soon".. but I'd say that 11n is not > usable for normal user operation mode, e.g., when planning to deploy an > operator network.
Well, I would be satisfied even if the R52n works in a/b/g mode for now, and in 1 year a kernel update brings in the 802.11n functionality. I intend these boxes to work for at least 5 years without any hardware changes, but I have the possibility to make kernel/software updates every 1-2 years. >> Both of these cards have connectors for 2 antennas, which also brings >> the question of where do I put the antennas? > > First of all, both connectors on the card gives you "just" diversity... > these are not two different physical wireless interfaces! Please be > aware that diversity is enabled by default (in madwifi) - even if no > antenna is connected to... therefore, the performance could be a little > bit under what you could get if diversity in enabled but just one > antenna is attached to the card. > > WRT 11n - if you really plan to use mimo you'd need to use the ath9k > driver... (again: IMO, not ready yet for daily use) > >> I haven't seen the case in person, but from the pictures there doesn't >> seem to be enough space on the back for even one antenna. > > there is one slot for a PCI card - use that to drill a hole into the > metal strip... that works out well As I am planning to use the PCI slot for the TDM card, I can't count on this space. But I just found out a possible solution in these pictures: http://soekris.kd85.com/images/dsc/tn/dsc07672.jpg.html http://soekris.kd85.com/images/dsc/tn/dsc07674.jpg.html So apparently I have space for just one antenna. Should I aim for 802.11n with only one antenna or should I just stick to the a/b/g card? Or maybe the antenna count doesn't make a difference at all in speed, but only in range? Thanks! _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
