TELECOM Digest OnLine - Sorted: Re: Replacement for Siemens Gigaset

Re: Replacement for Siemens Gigaset

DevilsPGD (spam_narf_spam@crazyhat.net)
Fri, 18 Nov 2005 15:36:44 -0700

In message <telecom24.524.12@telecom-digest.org>
bonomi@host122.r-bonomi.com (Robert Bonomi) wrote:

> In article <telecom24.519.13@telecom-digest.org>,
> DevilsPGD <spamsucks@crazyhat.net> wrote:

>> In message <telecom24.518.13@telecom-digest.org>
>> bonomi@host122.r-bonomi.com (Robert Bonomi) wrote:

>>> In article <telecom24.517.15@telecom-digest.org>,
>>> CharlesH <hoch@exemplary.invalid> wrote:

>>>> Thor Lancelot Simon wrote:

>>>>> I would stay away from the 900Mhz phones for a few reasons. First,
>>>>> the only multi-line phones available in 900Mhz are notoriously
>>>>> unreliable. Second, eavesdropping on many 900Mhz phones, even modern
>>>>> ones, is trivial.

>>>> How does one eavesdrop on a Digital Spread Spectrum (DSS) 900MHz
>>>> cordless phone? I would have thought that with the spreading code
>>>> being changed every time the phone is put into the base, they would be
>>>> essentially uncrackable, like CDMA cell phones.

>>> The phone and the base station have to negotiate the spreading code
>>> used for each session. If you can eavesdrop on that negotiation, you
>>> _can_ predict the frequency hops, rendering it 'trivial' to track as a
>>> third-party listener.

>> Sure, except that the negotiation is typically performed by the base
>> and handset via a wired connection OR at extremely low power (since it
>> only happens when they're physically connected)

> What happens if you turn the handset off, then back on, when it is
> _out_ of the base?

Typically they don't work at all until you put them back in the base.

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