I would go for Aastra SIP-DECT. http://www.aastra.com/rfp-32-ip_rfp-34-ip.htm

It’s capable for 8 simultaneous voice channels per Basestation. If combined with multiple basestations (up to 256) a maximum of 512 handsets are possible.

It’s cheap, powerfull and extendable.

My 2 cents

Erik

Btw. I use those things myself and can tell they’re working perfect with freeswitch.

Van: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] Namens Jonas Gauffin
Verzonden: zondag 27 februari 2011 18:40
Aan: FreeSWITCH Users Help
Onderwerp: [Freeswitch-users] Cordless phones

Hi,

I'm looking for IP-dects where a base station can handle 5 phones (which all should be able to talk at the same time).

All suggestions are welcome.

Regards,

  Jonas