High power wireless intercom

[[email protected]]

I have an application where a truck will pull onto a scale, the driver
will press a call button and a wireless talk path then must be opened
up to a distant office. The office is abouut 2000ft. away from the
scale. We would prefer hands feee VOX perhaps talk and listen on both
ends, in fact duplex if available would be great. Does anyone know of
such a system? Thanks. Lenny Stein, Barlen Electronics.

 

[lakewood]

www.homesecurity.com. but range 1000 ft. but low cost. they have
others also

 

[Dale Farmer]

I have an application where a truck will pull onto a scale, the driver
will press a call button and a wireless talk path then must be opened
up to a distant office. The office is abouut 2000ft. away from the
scale. We would prefer hands feee VOX perhaps talk and listen on both
ends, in fact duplex if available would be great. Does anyone know of
such a system? Thanks. Lenny Stein, Barlen Electronics.

GMRS radios. Cost about $39 each at radio shack. License is
something like fifty bucks for seven years for your company. There are
rechargeable and expendable battery powered ones. When someone drops it
into the rock crusher, you send someone out to walmart to buy another.

--Dale

 

[**THE-RFI-EMI-GUY**]

GMRS is not legal for commercial useage. In fact the trucker would have
to have a license! There are some long range wireless intercoms made.
Check some home automation websites. They are for people with long
driveways and similar requirement.

GMRS radios. Cost about $39 each at radio shack. License is
something like fifty bucks for seven years for your company. There
are rechargeable and expendable battery powered ones. When someone
drops it into the rock crusher, you send someone out to walmart to buy
another.

--Dale

--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P

 

[Dale Farmer]

GMRS is not legal for commercial useage. In fact the trucker would have
to have a license! There are some long range wireless intercoms made.
Check some home automation websites. They are for people with long
driveways and similar requirement.

FRS is the non-commercial one. GMRS is commercially licensable,
unless the FCC changed the rules again on me. GMRS and FRS do have some
frequencies in common, so they can talk to each other.
Of course, if the OP is not in the USA, then this doesn't apply.

--Dale

 

[**THE-RFI-EMI-GUY**]

Nope; read the FCC CFR47 Part 95 rules. GMRS requires a $75 license and
is specifically for personal use of higher power, wide band equipment.
Unless grandfathered, there should be no commercial useage. In fact, for
two stations to call each other they must each have a license or belong
to same family or each to a family holding a license. The definition of
family is pretty wide, so if you have a cousin with a license you may
operate under his umbrella. On the other hand the way the FRS rules are
written is subject to interpretation. That is why you might see Walmart
folks using FRS radios, and I doubt the FCC could do much. The fact that
the frequencies overlap adds another dimension.

FRS is the non-commercial one. GMRS is commercially licensable,
unless the FCC changed the rules again on me. GMRS and FRS do have
some frequencies in common, so they can talk to each other.
Of course, if the OP is not in the USA, then this doesn't apply.

--Dale

--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P

 

[[email protected]]

FRS is the non-commercial one. GMRS is commercially licensable,
unless the FCC changed the rules again on me. GMRS and FRS do have some
frequencies in common, so they can talk to each other.
Of course, if the OP is not in the USA, then this doesn't apply.

Nope. Businesses CANNOT get a GMRS license. Only individuals can get
a GMRS license.
The FCC changed the regulations decades ago.


See regulation part (b):

Sec. 95.5 Licensee eligibility.

(a) An individual (one man or one woman) is eligible to obtain,
renew, and have modified a GMRS system license if that individual is 18
years of age or older and is not a representative of a foreign
government.
(b) A non-individual (an entity other than an individual) is
ineligible to obtain a new GMRS system license or make a major
modification to an existing GMRS system license (see Sec. 1.929 of this
chapter).

 

[Dale Farmer]

Nope. Businesses CANNOT get a GMRS license. Only individuals can get
a GMRS license.
The FCC changed the regulations decades ago.


See regulation part (b):

Sec. 95.5 Licensee eligibility.

(a) An individual (one man or one woman) is eligible to obtain,
renew, and have modified a GMRS system license if that individual is 18
years of age or older and is not a representative of a foreign
government.
(b) A non-individual (an entity other than an individual) is
ineligible to obtain a new GMRS system license or make a major
modification to an existing GMRS system license (see Sec. 1.929 of this
chapter).

Okay. I've only been renewing licenses for quite some time now, so they
changed the rules on me. Damn bureaucrats. Of course, given the lax
enforcement that the FCC seems to exercise on businesses using FRS/GMRS
radios, they probably could use them anyway. Half the retail stores I
walk into lately have their employees using FRS radios around the store.

--Dale

 

[Mike Berger]

Motorola has systems like that -- they're very expensive
(and rugged and reliable).

The range you're looking at is a stretch for most consumer type
off-the-shelf equipment. One creative way to do it would be to
use inexpensive 802.11 wi-fi hardware with VOIP running between
the nodes.