asterisk users - Jun 2010 - 1.6 how to use groupcount and counteronpeer in queues to avoid ringinuse

Dear all

i'm planning an upgrade of some asterisk installation from 1.4.32 to
1.6.0.28 (as i think it should be the most stable now).

Reading the UPGRADE-1.6.txt file i've noticed that:

* SIP: The "call-limit" option is marked as deprecated. It still works
in this version of
  Asterisk, but will be removed in the following version. Please use
the groupcount functions
  in the dialplan to enforce call limits. The "limitonpeer"
configuration option is
  now renamed to "counteronpeer".

As i've experienced some problem with 1.4 release about call-limit,
i'd like to test this new counteronpeer functionality, but how to
handle the ringinuse parmeter in queues.conf ?

Basically i need that a sip user can make and receive more than one
call (like a call-limit 3 setting) but i don't want that this
interface rings if it is in a queue.

Is it possible to do that? How?

Thanks to all

-- 
/*************/
nik600
http://www.kumbe.it