restriction for one extension on multiple phones

1. Brekeke Product Name and version:Brekeke PBX, Version 2.1.6.6 , Pro

2. Java version:jre1.5.0_15

3. OS type and the version: Windows xp sp2

4. UA (phone), gateway or other hardware/software involved:
x-lite, Audio codes MP-114fxo
5. Select your network pattern from http://www.brekeke-sip.com/bbs/network/ ... terns.html :

6. Your problem:
I noticed that same user can log in to two different x-lite phones.
I want to restrict that only one user can log in only once.
how this can be done.
thanks

Try this dialplan..
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Matching Patterns:
$registered( From ) = true
$addr = (.+)
$registeredaddr( From ) = !%1

Deploy Patterns:
$action = 603
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