Harris County, TX trunk system has me baffled
Linda Thomas
I'm hoping that someone can help me out here. Please reply directly as I
don't always get to read this group in a timely manner.
I just got a new BC895XLT trunk tracker and I promptly went to enter the
trunk frequencies. Here's where the first problem begins...
From the 1998 Police Call, I get a set of 25 frequencies 856-860 at .2125,
.2375, .4625, .4875 and .7125. These are all registered as WNBZ674.
There are another set of 26 frequencies between 866 and 868 registered to
WPKL474.
So I'm thinking, "ok, there are two distinct systems" and I go on to look at
the first one. Here it gets stranger...
There are two control frequencies in the first set. Depending on which I
program in, I get different traffic. Is it possible that the first set of
frequencies itself encompasses two systems? If so, how can I tell which go
with which control? Or am I missing something else and just confused?
The second set of 26 frequencies is much less active overall but it also has
a control channel.
I know (or at least think) that a trunked system can't have more than 30
frequencies so I don't think the two sets of frequencies could be combined
into a 51 frequency system.
Does anyone know how I can figure this out? In the first set of 25, can two
distinct control channels share the same set of frequencies? If this is the
case then I can only trunktrack one at a time.
Any insights would be greatly appreciated!
-Linda
John Habbinga
These are the frequencies for the Harris Co. Trunked radio system.
856.2125
856.2375
856.4625
856.4875
856.7125
857.2125
856.2375
856.4625
856.4875
856.7125
858.2125
858.2375
858.4625
858.4875
858.7125
859.2125 * If this frequency contains a data signal, then do not include.
859.2375
859.4625
859.4875
859.7125
860.2125 * If this frequency contains a data signal, then do not include.
860.2375
860.4625
860.4875
860.7125
867.9125
868.2375
Every now and then, Harris Co. will put data on either 859.2125 or 860.2125.
If either of these frequencies contain data, then delete them from the list.
If you leave them in it will make the radio track only a few talkgroups.
Linda Thomas
John Habbinga wrote in message <6k7kor$vm3$1...@news4.wt.net>...
>These are the frequencies for the Harris Co. Trunked radio system.
>[frequencies snipped]
>Every now and then, Harris Co. will put data on either 859.2125 or
860.2125.
>If either of these frequencies contain data, then delete them from the
list.
>If you leave them in it will make the radio track only a few talkgroups.
Here's what I've noticed. Control channel broadcasts on 859.2375 and
859.4875. When I use .2375 I only get a few talkgroups (11504, 208, 10000,
11760 and a few others). Using .4875 as the control channel I get a lot
more talkgroups but so far haven't got any of the ones listed above.
I've also seen consistent data (non-control but some other kind of data,
maybe mdt) on 856, 857 and 858 all at .4625.
What gets even weirder is that no two people on the net seem to agree on
which of the 866-868 frequencies should be included. I've heard voice on
868.4875, 867.5375, 867.9125 and 868.4875. I've also heard a control
channel on 868.9500 and intermittently on 868.9750.
Also, when I program in the second set of 26 frequencies using 868.9500 as
the control channel I get traffic very similary to the 856-860 when using
859.2375 as the control channel. Some of the same talkgroups and it sounds
like the same people. I haven't listened long enough to figure out what is
going on.
How did you determine that 867.9125 and 868.2375 should be added to the
856-860 trunk?
Thans for your help in trying to de-baffle me!
-Linda
John Habbinga
I found those frequencies listed at www.installer.com. I tried them and they
do seem to be a part of the system.
I use all the frequencies that I gave you and I have a lot of traffic.
Especially during the day when other agencies, such as animal control, flood
district, etc are working. I have noticed that on the RadioShack Pro-90 that
when left on for several days it may lose track of the control signal. If
it does I can corrected it by turning the scanner off and back on. I think
that Bill Gates taught scanner manufactures how to do this. I posted the
frequencies for the Harris County system and the Trunktracker talkgroup
codes for just the Sheriff's Department at
http://members.aol.com/jdhtex/houstonscan/harrisco.htm.
Linda Thomas wrote in message <35686...@news8.kcdata.com>...
Leo Waltz
So, what are the following?
860.9875
859.9875
858.9875
857.9875
856.9875
858.9875 definitely has traffic,
and 860.9875 is a control or data at the present time.
John Habbinga
All of those frequencies belong to the East Texas Medical Center in Crocket,
Texas. I guess that if you have a tall antenna and live in the north part of
Houston, then you might be hearing that. None of those frequencies that you
listed appear to be used in Harris county. If you are using a dual
conversion scanner it is very likely that what you are hearing is image
interference.
I scanned those frequencies, on a RadioShack Pro-90, Sunday evening and
heard nothing at all. Of course there may not have been much activity to
scan at that time so I cannot say for sure that there is nothing in
Houston/Harris county on those frequencies.
Leo Waltz wrote in message <3568AB9A...@prodigy.net>...
John Habbinga
A search of the Percon database shows these frequencies for East Texas
Medical Center in Crockett, TX. If you live in far north Harris, County and
have a tall antenna you can probably hear them. You might also be able to
hear them because of tropspheric ducting. I know that for the last week we
have had unusual propagation related to some sort of a low pressure system.
I have talked to several states on two meter ham radio in the mornings and
evenings this week.
811.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
812.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
813.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
814.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
815.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
856.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
857.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
858.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
859.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
860.9625 WPIE760 EAST TEXAS MEDICAL CENTER YP CROCKETT TX
HOUSTON
John Habbinga
Sorry, wrong frequencies on that last post. The freqs are in Tyler, not
Crockett. They are:
856.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
857.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
858.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
859.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
860.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
856.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
857.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
858.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
859.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
860.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
811.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
812.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
813.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
814.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
815.7375 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
811.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
812.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
813.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
814.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
815.9875 WPIE756 EAST TEXAS MEDICAL CENTER YP TYLER TX
SMITH
----------------------------------------------------------------------------
----
John Habbinga
I have noticed a similar thing. I noticed that if I delete 859.2375 I pick
up a lot more. If I have 859.2375 in the trunking bank, then I get the same
11504, 208, 11760 that you did and little else. I think the reason there is
more than one control channel is because the system is a "Type 2 Hybrid"
configuration. This means that a fleet map needs to be programmed into the
radio. I don't know what the fleet map is supposed to be. When I figure it
out I will email you and let you know. If you find out first let me know!
Leo Waltz
The ".9875" frequencies are strong on my BC235 in the SE portion of
Harris county (using factory antenna), and the conversations talk about
auto accidents near airport, traffic on Hwy. 3, units being out at the
jail, District 1, District 4, etc.
The data/control channel has been shifted to 860 from 858 since
yesterday, and 860 now has more voice traffic. It has the low pitch
(using stereo headphones) audio shutoff similar to the other Harris
county trunk channels.
I originally got those frequencies from a posted list for Harris county,
and they also show among the San Antonio City/Bexar County system
frequencies, and 6 other Texas cities besides the Tyler listing you
have.
In fact, I think I have just this minute found the answer by looking up
the frequencies (in Police Call-1998)-- one of those 7 Texas cities for
those frequencies is League City, which also has Pasadena traffic on
their trunking system.
This will take some more monitoring to ascertain just who is using the
frequencies.
Linda Thomas
John Habbinga wrote in message <6katau$gtk$1...@news4.wt.net>...
>I have noticed a similar thing. I noticed that if I delete 859.2375 I pick
>up a lot more. If I have 859.2375 in the trunking bank, then I get the same
>11504, 208, 11760 that you did and little else. I think the reason there is
>more than one control channel is because the system is a "Type 2 Hybrid"
>configuration. This means that a fleet map needs to be programmed into the
>radio.
I did some investigating last night and here's what I've noticed:
856.2125, 856.4875, 857.2125, 858.2125, 858.4875, 859.4625, 859.7125,
860.2325, 860.4875, 860.7125 and 867.9125 seem to comprise one system.
Currently 860.7125 is the control channel.
856.2375, 857.2375, 858.2375, 859.2375, 860.2125 and 868.4875 see to
comprise another smaller system. Currently 859.2375 is the control channel.
I, coincidentally just got an email from Steve Casko that duplicates this
set of frequencies.
Lastly, 866.5255, 867.5375 and 868.95 seem to make up another one.
I left out 856.4625, 857.4625 and 858.4625 as permanently allocated data
channels. If they are actually a part of one of he above I have no way ot
telling which..
859.4875 seems to be consistently used as a phone patch. Again, don't know
which system it is a part of.
866.4875 doesn't seem to belong to any of those three control channels
though I've heard voice traffic on it. Sounded like some EMS dispatch but I
don't know where.
I've not yet heard anything on 856.7125, 857.4875, 857.7125, or 858.7125.
I'm still trying to track those down. I've heard voice traffic but not yet
isolated 859.2125, 859.4875 and 860.4625.
I still don't know what this all means. It seems odd that Harris County
would operate three separate systems. John's comment about the system being
a type IIi system may be accurate but it sure feels like three separate
systems.
If I come up with anything else, I'll let you know...
-Linda
Scott Royall
Linda....@dialaccess.com,
Good question. With your Uniden came a booklet of trunking systems.
Surprisingly, that booklet is more accurate for Harris County than Police Call.
Saturday May 23 1998 13:04, Linda....@dialaccess.com wrote to All:
LT> From: "Linda Thomas" <Linda....@dialaccess.com>
LT> Subject: Harris County, TX trunk system has me baffled
LT> I'm hoping that someone can help me out here. Please reply directly as I
LT> don't always get to read this group in a timely manner.
LT> I just got a new BC895XLT trunk tracker and I promptly went to enter the
LT> trunk frequencies. Here's where the first problem begins...
LT> From the 1998 Police Call, I get a set of 25 frequencies 856-860 at .2125,
LT> .2375, .4625, .4875 and .7125. These are all registered as WNBZ674.
LT> There are another set of 26 frequencies between 866 and 868 registered to
LT> WPKL474.
LT> So I'm thinking, "ok, there are two distinct systems" and I go on to look
LT> at the first one. Here it gets stranger...
LT> There are two control frequencies in the first set. Depending on which I
LT> program in, I get different traffic. Is it possible that the first set of
LT> frequencies itself encompasses two systems? If so, how can I tell which
LT> go with which control? Or am I missing something else and just confused?
LT> The second set of 26 frequencies is much less active overall but it also
LT> has a control channel.
LT> I know (or at least think) that a trunked system can't have more than 30
LT> frequencies so I don't think the two sets of frequencies could be combined
LT> into a 51 frequency system.
LT> Does anyone know how I can figure this out? In the first set of 25, can
LT> two distinct control channels share the same set of frequencies? If this
LT> is the case then I can only trunktrack one at a time.
LT> Any insights would be greatly appreciated!
LT> -Linda
Scott
sc...@conchbbs.com
roy...@shellus.com
FAX: 281-556-5464
--
|Fidonet: Scott Royall 1:106/357
|Internet: sc...@conchbbs.com
|
| Standard disclaimer: The views of this user are strictly his own.
RandyCz
In article <6k7kor$vm3$1...@news4.wt.net>, "John Habbinga" <habbinga(remove
this)@wt.net> writes:
>Every now and then, Harris Co. will put data on either 859.2125 or 860.2125.
>If either of these frequencies contain data, then delete them from the list.
>If you leave them in it will make the radio track only a few talkgroups.
>
Now I'm really confused. I usually listen to Harris County SO and Pct 4
Constable but I have found I can't listen to both at the same time. I bought a
second TT and found that if I leave 859.2375 out of one and 859.7125 out of the
other I can listen to both. This only works about 60% of the time. The other
40% I can either hear both on one radio or neither.
Randy
Leo Waltz
I also have that booklet, and looked this up--
That booklet lists 4 groups for Harris county, with some of the
frequencies appearing in more than one group. How do you suggest
programming them? And which is S.O. vs. some other county usage?
Same question for the Pasadena frequencies. The PD is not noted in
their two sets either.
John Habbinga
I think the solution to the problems associated with scanning Harris Co.
system are due to the fact that it is a "Type 2 Hybrid" system and needs to
have a custom fleetmap programmed into it. I can't seem to get any better
results from the preprogrammed fleetmaps. As soon as someone figures out the
correct fleetmap, please let me know.
John Habbinga
I have been listening this eveing and several times the dispatcher has said
"Be advised that we are having radio problems today" and "There is a 'trunk'
down." I have noticed some unusual TG codes today also. Perhaps these
trunked radio systems are not all they are cut out to be. Seems that they
are having trouble getting someone to fix their radio problems over the
Memorial day weekend.
Charles McCallister
John,
ｯ As soon as someone figures out the
ｯ correct fleetmap, please let me know.
That's interesting. Seems you know your stuff and I find myself
counting on you or others to keep me informed.
How do we figure out a fleetmap?
Charles
To reply, remove the "x" in my address
John Habbinga
If you have a trunktracker scanner, then consult your owner's manual about
how to program fleetmaps for Type 1 and Type 2 hybrid systems. Near the end
of my manual there are several fleetmaps listed that are "preprogrammed"
into the scanner. I assume that they are preprogrammed because they are the
most common fleetmaps. A custom fleetmap can also be programmed into the
radio. Since I have not been able to confirm that the Harris County system
matches any of the preprogrammed listing, then I believe a custom fleetmap
is needed. So how do "we" figure out a fleetmap. Trial and error perhaps.
Program different size codes into different blocks until one works
correctly. Or maybe somebody knows someone that is more knowledgable about
the technical aspects of the system. If I figure it out I will post it at
http://members.aol.com/jdhtex/houstonscan/ .
Charles McCallister wrote in message ...
Scott Royall
Leo....@prodigy.net,
Here's what I've found out. Yes, there are four separate systems, each tends
to favor an area. These systems also work together in a Smartzone arrangement.
If you do not program 860.2125, the scanner functions correctly on the main
system in Houston. This is where SO runs. The little systems are more for the
outlying agencies. For example, my VFD switched to Clodine because their HTs
had trouble reaching into Houston.
Monday May 25 1998 17:35, Leo....@prodigy.net wrote to All:
LW> From: Leo Waltz <Leo....@prodigy.net>
LW> Subject: Re: Harris County, TX trunk system has me baffled
LW> Organization: Prodigy Services Corp
LW> I also have that booklet, and looked this up--
LW> That booklet lists 4 groups for Harris county, with some of the
LW> frequencies appearing in more than one group. How do you suggest
LW> programming them? And which is S.O. vs. some other county usage?
LW> Same question for the Pasadena frequencies. The PD is not noted in
LW> their two sets either.
F. Barry Mulligan
While I don't know of a simple or exact method of determining the fleet
map of a Motorola trunk system (short of having a friendly system manager
tell you), I've had fair sucess examining the IDs for the underlying pattern.
While I use a computer link to log hit counts for all IDs over a day's span,
you can do it by hand for a few hours and get a fairly good list. Likewise,
I wrote a simple program to print the binary equivilents of the IDs but a
calculator and patience can do the job.
Program the frequencies for the target system using the Type II default.
Log all IDs that appear and keep a hit count for each, at least until you
have three or four hits for an ID. If an ID occurs only once in a four hour
span, it may be a false reading. Where you can determine it, note the user
for an ID i.e. fire, sheriff, police, sanitation.
Sort the list in ascending order. Translate the decimal IDs that the TT
reported into binary. If almost all the IDs end with the bit pattern "10000"
you have a Type II system and no fleet map is required.
For a Type I or hybrid system, the first three of the 16 bits are the
block number. The remaining 13 bits contain the fleet, subfleet and user ID.
The challange is to determine how many bits are used for each element (the
fleet number is omitted for blocks with size codes 4 and 12-14).
Split your list into blocks, based on the first 3 bits. For each block,
look for ascending patterns in the low-order bits, followed by a sudden
reversion to all zeros. The ascending numbers are probably user IDs within
a subfleet. An increment in the higher bits at this point would indicate
the next subfleet (or fleet) number. Scan the set of IDs for the block and
decide what the logical grouping of bits is. For an example, an early log
of block 2 for Fulton County, GA produced:
Group Blk Flt/Subflt/ID Usage
16640 010 0000100000000 Fire rescue
16643 010 0000100000011 EMS dispatch
20736 010 1000100000000 Sheriff - Patrol
20739 010 1000100000011 Sheriff
20819 010 1000101010011
20838 010 1000101100110
20912 010 1000110110000
20992 010 1001000000000 Sheriff - Tac 1
21504 010 1010000000000 Sheriff Courts
22784 010 1100100000000 Marshal Patrol
22819 010 1100100100011
22833 010 1100100110001
23040 010 1101000000000 Marshal Tac 1
23839 010 1110100011111 Marshal admin
There is clearly a break after the 8th bit, with the trailing eight
bits being user numbers (note the increasing series from 20736 thru 20912).
The change between 16643 and 20736 would indicate that only one bit is
used for the fleet number. Breaking the bit pattern at these points produces:
Group Blk F SubF user Type I ID
16640 010 0 0001 00000000 } 200-1
16643 010 0 0001 00000011 }
20736 010 1 0001 00000000 ]
20739 010 1 0001 00000011 ]
20819 010 1 0001 01010011 ] 201-1
20838 010 1 0001 01100110 ]
20912 010 1 0001 10110000 ]
20992 010 1 0010 00000000 201-2
21504 010 1 0100 00000000 201-4
22784 010 1 1001 00000000 }
22819 010 1 1001 00100011 } 201-9
22833 010 1 1001 00110001 }
23040 010 1 1010 00000000 201-10
23839 010 1 1101 00011111 201-13
This corresponds to size code 11. It's helpful to pencil-in on the Size
Code Chart the number of bits for each fleet & subfleet size.
While eyeballing the bit patterns may not give a clear idea of the
proper size code, it will eliminate most of the impossible choices and
reduce the testing to two or three possibilities for each block.
/* barry /&
(P.S. I should acknowledge that in Atlanta this is all academic; the
local fleet maps are built into the TT - thanks Greg <g>)
Scott Royall
mull...@ACM.ORG,
While this is all good stuff, Harris County is a SMART-ZONE system. Please
don't confuse people. My information comes from a conversation between
Life-Flight 3, Control, and a Motorola tech back when the Tomball satellite
system was added.
Wednesday May 27 1998 12:46, mull...@ACM.ORG wrote to All:
m> From: mull...@ACM.ORG (F. Barry Mulligan)
m> Subject: Re: Harris County, TX trunk system has me baffled
m> Organization: ACM Network Services
m> chuc...@ibm.net (Charles McCallister) wrote:
>> How do we figure out a fleetmap?
m> While I don't know of a simple or exact method of determining the fleet
m> map of a Motorola trunk system (short of having a friendly system manager
m> tell you), I've had fair sucess examining the IDs for the underlying
m> pattern. While I use a computer link to log hit counts for all IDs over a
m> day's span, you can do it by hand for a few hours and get a fairly good
m> list. Likewise, I wrote a simple program to print the binary equivilents of
m> the IDs but a calculator and patience can do the job.
m> Program the frequencies for the target system using the Type II
m> default. Log all IDs that appear and keep a hit count for each, at least
m> until you have three or four hits for an ID. If an ID occurs only once in a
m> four hour span, it may be a false reading. Where you can determine it, note
m> the user for an ID i.e. fire, sheriff, police, sanitation.
m> Sort the list in ascending order. Translate the decimal IDs that the TT
m> reported into binary. If almost all the IDs end with the bit pattern
m> "10000" you have a Type II system and no fleet map is required. For a
m> Type I or hybrid system, the first three of the 16 bits are the block
m> number. The remaining 13 bits contain the fleet, subfleet and user ID. The
m> challange is to determine how many bits are used for each element
m> (the fleet number is omitted for blocks with size codes 4 and 12-14).
m> Split your list into blocks, based on the first 3 bits. For each block,
m> look for ascending patterns in the low-order bits, followed by a sudden
m> reversion to all zeros. The ascending numbers are probably user IDs within
m> a subfleet. An increment in the higher bits at this point would indicate
m> the next subfleet (or fleet) number. Scan the set of IDs for the block and
m> decide what the logical grouping of bits is. For an example, an early log
m> of block 2 for Fulton County, GA produced:
m> Group Blk Flt/Subflt/ID Usage
m> 16640 010 0000100000000 Fire rescue
m> 16643 010 0000100000011 EMS dispatch
m> 20736 010 1000100000000 Sheriff - Patrol
m> 20739 010 1000100000011 Sheriff
m> 20819 010 1000101010011
m> 20838 010 1000101100110
m> 20912 010 1000110110000
m> 20992 010 1001000000000 Sheriff - Tac 1
m> 21504 010 1010000000000 Sheriff Courts
m> 22784 010 1100100000000 Marshal Patrol
m> 22819 010 1100100100011
m> 22833 010 1100100110001
m> 23040 010 1101000000000 Marshal Tac 1
m> 23839 010 1110100011111 Marshal admin
m> There is clearly a break after the 8th bit, with the trailing eight
m> bits being user numbers (note the increasing series from 20736 thru 20912).
m> The change between 16643 and 20736 would indicate that only one bit is
m> used for the fleet number. Breaking the bit pattern at these points
m> produces:
m> Group Blk F SubF user Type I ID
m> 16640 010 0 0001 00000000 } 200-1
m> 16643 010 0 0001 00000011 }
m> 20736 010 1 0001 00000000 ]
m> 20739 010 1 0001 00000011 ]
m> 20819 010 1 0001 01010011 ] 201-1
m> 20838 010 1 0001 01100110 ]
m> 20912 010 1 0001 10110000 ]
m> 20992 010 1 0010 00000000 201-2
m> 21504 010 1 0100 00000000 201-4
m> 22784 010 1 1001 00000000 }
m> 22819 010 1 1001 00100011 } 201-9
m> 22833 010 1 1001 00110001 }
m> 23040 010 1 1010 00000000 201-10
m> 23839 010 1 1101 00011111 201-13
m> This corresponds to size code 11. It's helpful to pencil-in on the Size
m> Code Chart the number of bits for each fleet & subfleet size.
m> While eyeballing the bit patterns may not give a clear idea of the
m> proper size code, it will eliminate most of the impossible choices and
m> reduce the testing to two or three possibilities for each block.
m> /* barry /&
m> (P.S. I should acknowledge that in Atlanta this is all academic; the
m> local fleet maps are built into the TT - thanks Greg <g>)
Charles McCallister
Barry,
ｯ chuc...@ibm.net (Charles McCallister) wrote:
ｯ > How do we figure out a fleetmap?
ｯ
ｯ While I don't know of a simple or exact method of determining the fleet
ｯ map of a Motorola trunk system (short of having a friendly system manager
ｯ tell you), I've had fair sucess examining the IDs for the underlying pattern.
ｯ While I use a computer link to log hit counts for all IDs over a day's span,
ｯ you can do it by hand for a few hours and get a fairly good list. Likewise,
ｯ I wrote a simple program to print the binary equivilents of the IDs but a
ｯ calculator and patience can do the job.
<snip>
Whew! Ask and ye shall receive. <g>
Thanks! And saved for a rainy day to digest.
John Habbinga
Barry, you can come stay at my house here in Houston and figure out a fleet
map for me.
SchneidC
Randycz wrote:
<I usually listen to Harris County SO and Pct 4
Constable but I have found I can't listen to both at the same time. I bought a
second TT and found that if I leave 859.2375 out of one and 859.7125 out of the
other I can listen to both>
I use one 895 to listen to both Harris County Pct 4 and Dispatch 1--no
sweat...don't understand the problem...
charley
Dane L. Cantwell
In article <199805301045...@ladder03.news.aol.com>,
Harris county is in the middle of switching the system over to smartnet.
They are using two control freqs right now. One is for the smartnet
system and one is for the old system. It takes a long time to reprogram
several thousand radios so they are doing it by department. That is, part
of radios are hearing the old control and some new. That is why it looks
like there are two contrl freqs.....there are right now.
Give it a little time and the confusion will take care of it's self.... I
hope!!
Dane