// Monitoring 2.4 GHz Cordless Phones
//
// by m2mike
//
// http://www.oldskoolphreak.com


It is a very common misconception that 2.4 GHz phones can not be monitored,
but they can.

As I have been having entirely too much fun playing with cordless phones
lately, I figured that I would share some information on how to monitor the
Uniden EXA2245, a very popular 2.4 GHz cordless phone.

The equipment to monitor microwave communications is scarce, but let me
recommend one handheld scanner if you want a portable setup. The Icom R3
Communications Reciever is good for clandestine operations with 2.4 GHz
phones. It will listen all the way up to 2450.5 MHz, which is high enough
for most 2.4 GHz cordless models.

This is the info I have been able to collect on the Uniden EXA2245:


Base Frequencies
----------------
2428.85
2429.1
2429.955
2429.43
2430.5
2430.6
2431.2
2431.7
2432.2
2433.5
2434.1


Handset frequencies
-------------------
2436.4
2436.5
2436.6
2436.75
2436.9
2437.0
2437.1
2437.2
2437.4
2437.5
2437.575


It would appear that there are 11 channels, but I am not sure if I got them
all. Scan from 2428 - 2435 to find all the base frequencies and 2436 - 2438
to find all the handset channels. I should also recommend that you obtain a
2.4 GHz high gain antenna. I highly recommend a parabolic grid antenna that
has a high dbi rating. One can be had from pasadena.net or fab-corp. The
more gain the better. I mention this because the Icom R3 doesn't handle 2.4
GHz that well. I am told that some earlier R3's are "deaf" to microwave. Be
careful about using a preamp as you can fry your reciever quite easily.