[TrunkCom] phone patch and I-calls

[rob.berezowski at sasktel.sk.ca]

The .0 and 700000 labels are only used in the BC250D scanner. It 
designates a wild card for Radio ID to monitor Individual Calls. Phone 
patches and private calls between two individual radios are broadcast on 
the trunked system as Individual Calls. An Individual Call is a voice 
conversation intended for one radio only, and not a group. On a trunked 
system, if a radio sees an Individual Call, and the radio id matches its 
own radio id, then the radio will respond and tune to the voice channel. 

On the BC250D (and other Uniden scanners), the .0 and 700000 codes tell 
the scanner that the user wishes to listen to Individual Calls being sent 
to any radio id. Therefore, the scanner will tune to the voice channel 
regardless of which radio id is involved in the Individual Call. 

The level of usage of phone patches varies widely among systems, and 
administrator rules. There is wide use of phone patches on the EDACS and 
Motorola systems I monitor. In fact, they even allow personal phone calls, 
which means a lot more phone calls. On other systems in other cities, I've 
seen systems with absolutely no phone patches, and some systems that have 
phone patch capability but the option is seldom or never used.

Rob


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Date: Wed, 12 Oct 2005 20:06:30 -0400 (EDT)
From: Jeff Kenyon <at649 at tcnet.org>
Subject: [TrunkCom] phone patch and I-calls
To: trunkcom at mailman.qth.net
Message-ID: <Pine.LNX.4.58.0510122004400.20131 at hendryx.tcnet.org>
Content-Type: TEXT/PLAIN; charset=US-ASCII

Hi everyone, I konw taht with the BC250D by entering in TG 700000 on a
Motorola trunked system and .0 with EDACS you can monitor I-calls and
track them, but I also noticed that this is what many systems assign for
phone patch calls, and it is really surprising in terms of how many people
are authorized to have phone patch access on many systems, but I was just
wondering in terms of EDACS is .0 what gets assigned for phone patch calls
on those systems?





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