[TrunkCom] GRE folks

[Wayne M H]

On Thu, 19 Jun 2003 16:54:16 -0500, "Todd Hartzel" <toddh@brick.net>
wrote:

>On 19 Jun 2003 at 9:23, Wayne M H wrote:
>
>> On Thu, 19 Jun 2003 07:15:22 -0500, "Todd Hartzel" <toddh@brick.net>
>> wrote:
>>=20
>> >On 18 Jun 2003 at 22:17, Brian J Cathcart wrote:
>>=20
>> "Cross-patching" or not, both patching and MSELs operate in the same
>> manner over the CC. Just the TG incrementation changes. So your point
>> is irrelevant. He was trying to make a point in relation to his
>> example. Not every system operates like St Louis does.
>>=20
>> -Wayne
>
>They do?  If so, then Multi-Selecting should not be a problem for
>my Trunktrackers (bc-235, bc-245, bc-780, pro-92 & pro-94).  Because two=
=20
>years ago when those talkgroups were patched together, my trunktrackers=20
>received the patched groups with no problems at all (Flawlessly).  I =
have to=20
>disagree with you.  There is something differant over the Control =
Channel
>between cross-patching & Multi-Select.  Otherwise this problem would=20
>not exist.     The fact that a seemingly random (ID+7) ID pops up on our=
=20
>trunktrackers, which is other than the original dispatcher hitting the =
'APB'=20
>button on the Centracom Gold Elite console. =20

You can disagree but when I write my own program that decodes the
Motorola control channel, I know what I'm talking about when it comes
to what it spits out.

When a Multiselect or a patch is initiated the only differences are
the supergroup is either tagged with a "status bit" of 3 for a path or
7 for an MSEL. When the dispatcher transmits the MSEL the call goes
out with the group +7, or if a patched group becomes active, it is +
3.

No scanner has yet to properly follow a patch in the same manner as a
Motorola does. It may have *seemed* like it did before and that's
because the supergroups stayed the same. I don't care what you've seen
or how the consoles are configured. Obviously when the MSEL is
initiated it isn't happening on the same talkgroup you are monitoring.
You need to find out the other talkgroups and check them. There *is* a
supergroup being sent out if the Motorola radios are tracking it
properly.

Argue all you want but I've seen the code and I know how it works.

-Wayne