[asterisk-biz] Wireless SIP phones?

[Trixter aka Bret McDanel]

On Wed, 2008-07-16 at 09:59 +0300, Stelios Koroneos wrote:
> What you do, is register the DECT phone to one of the base stations and then
> you can roam arround. Hand-off time is so fast you can talk while moving
> from station to station and there is no interruption.

that is because dect is designed first as a voice system, with roaming
built in, just like GSM (its kinda a "low power gsm" system, the
protocol is almost the same).


> Although the system comes with Philips phones, we were able to get GAP
> compatible phones to work without any issue from manufactures like
> Siemens,and Panasonic

its critical for interoperability that you get GAP phones, that is the
only cross vendor standard, anything else you risk getting into a closed
system where you can only use that makers phone.  The encryption
algorithm is operator specified, so GAP isnt required but its a good
idea in my opinion.  The entire DECT spec is free except for GAP, ETSI
only releases that under an NDA and money paid, which is silly, but they
do that to try to get something if you want to make an interoperable
phone, and its this reason why some of the cheaper DECT systems dont do
GAP.


> Most of the entry level one's do not support encryption and even if they
> had, they were WEP based, that can now be cracked in a few minutes.

wep can be broken in less than 60 seconds on even an old PC.  There are
many published papers dating back the last couple years on that.  So its
actually worse than you said...

-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
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