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

Re: Replacement for Siemens Gigaset

Thor Lancelot Simon (tls@panix.com)
Fri, 18 Nov 2005 23:55:09 UTC

In article <telecom24.524.12@telecom-digest.org>, Robert Bonomi
<bonomi@host122.r-bonomi.com> wrote:

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

>>> 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?

The claim about "negotiating the spreading code only when they're
physically connected" is plainly false: if it were true, the
multi-handset phones now so popular simply wouldn't work. After all,
each handset has its own charging stand; only one of these is the
"base".

Thor Lancelot Simon tls@rek.tjls.com

"The inconsistency is startling, though admittedly, if consistency is
to be abandoned or transcended, there is no problem." - Noam Chomsky

Post Followup Article Use your browser's quoting feature to quote article into reply
Go to Next message: Steven Lichter: "Re: Verizon and Caller ID"
Go to Previous message: DevilsPGD: "Re: Replacement for Siemens Gigaset"
May be in reply to: rlittle@thetasoft.com: "Replacement for Siemens Gigaset"
Next in thread: DevilsPGD: "Re: Replacement for Siemens Gigaset"
TELECOM Digest: Home Page