For MURS system, is there one master base station
and then separate slave sub-stations?
A: No, all the
stations are the same. All the units are exactly the same unit
whether you buy a set of two, or you add on a single unit.
You can mix these units anyway you like.
Q. Can I use MURS intercoms
to call individual rooms?
A. MURS intercoms have five
channels and you could set up rooms on their own channels.
To call a room you would change your intercom to the channel
of the room you want to call, and then change it back to
your channel when done. As long as everyone remembers to
change back to their channel, this could work. Ideally
wireless works better to broadcast messages to everyone.
If you only need one master station
that calls or receives calls from other rooms, and those
rooms don't call each other, then you could use the MURS
Commercial Wireless Intercom which has scanning capability
so it can scan all channels. If a room calls it, it will
lock on to that channel so communication can take place. The
cheaper MURS Multi-Mile Intercoms can be used in the rooms
since they don't need to scan channels.
Q. Can I wall-mount the MURS
Multi-Mile Base Wireless Intercom?
A. No. It has no way to mount on
a wall. It is has to sit on a desk or other flat surface.
Only the MURS Commercial Wireless Intercom will wall mount
with its optional wall mount bracket.
Q. Do the MURS base station
intercoms have a monitor mode that allows me to listen in to
an area around them like a baby monitor?
A. No. The Monitor button you
see on the MURS Multi-Mile Base Wireless Intercom only lets
you listen for any activity on the channel you are on. MURS
intercoms have 38 "quiet codes" and one of these codes can
be transmitted at the beginning of a call. If the receiving
radios are set to same code, then they will turn on their
speaker and play the message. If not they remain silent even
though the channel is active. You can use the Monitor
feature to listen before you broadcast a message so you can
hear if the channel is being used by someone else.
Q. Should I buy a UHF or VHF
radio or intercom?
A. That depends on your
application and whether or not you want to get an FCC
license. VHF has the non-licensed MURS frequencies whereas
UHF requires getting a license. Overall UHF is better in
buildings than VHF. VHF may get better range outdoors in
open environments. For a more detailed description click
UHF versus VHF
General Wireless Questions
Q: I want a voice only
wireless intercom, but I don't
know whether to choose the MURS Multi-Mile or the WireFree
intercom system. Which one should I choose?
A: It first comes
down to range. If you need less than 1000 feet, the
WireFree may be OK. It depends on what is between your
intercoms as to how long your range will be. The WireFree is cheaper and it provides digital security
whereas the MURS does not. The MURS does have privacy codes
so you won't hear other people on your channel, unless they
are set to the same privacy code (38 available). The
Wirefree system also can be run totally battery powered and
it has an outdoor intercom
available for future expansions. The MURS system does have
wireless outdoor intercom call boxes, but they are more
industrial looking and are better for commercial
applications. If you are concerned about
range, then the MURS has the longest range of any wireless
intercom system on the market. It is also on a wireless
frequency that doesn't have much traffic. MURS also has a
wide variety of devices that work with it.
Q: Do walls and
other obstructions limit the ranges specified for the
A: Yes. The
ranges specified are for the most part clear line of site
ranges. So if you are in a Kansas wheat field with no
obstructions between wireless intercom units, you should
easily get the range listed. However, when you have walls in
the way, range will go down. Brick walls reduce range more
than drywall does. Metal-framed walls reduce range more than
wood-framed walls. A wall filled with electrical wires every
foot or so will reduce range more than one with only one or
two wires in it. There is no magic way to determine whether
a wireless intercom will work in your application so you
just need to try it and return it if it doesn't.
Q. We have a
workshop that is a metal building in our backyard, which
wireless intercom will work in it?
A. The best choice for
this application is the high-powered MURS base intercoms. The MURS intercoms
have the power to punch through both the metal walls of the
building plus brick walls of a house. The range will be
significantly less than four miles, but for most
applications they should still work. You can also put an
external antenna on a MURS base intercom and route it
outside the metal building to increase your range.
Q: Will your
intercoms interfere with my wireless network for my
A: Wireless home
PC networks operate in the 2.4GHz range. Our voice only
wireless intercoms operate in other frequencies so they
Q: I need an
intercom in a commercial building. Should I go with wireless
A: A wired system
would likely provide the most reliable service, but it
depends on your building. In most cases a commercial
wireless system will do fine. But the more concrete and
electrical equipment you have, the higher the chance that
the wireless system won't work for you. If you can afford
the expense of running the wiring, then you know the system
will work. We do have a 45-day return policy, so if you want
to try wireless, you have nothing to risk except shipping
costs. If you go wireless, use the license-free MURS
Wireless System or pick a UHF system that needs an FCC
license to operate.
Intercoms For Use With Callboxes
Q. I want to use one of your
MURS Callboxes. What device do I need on the other end to
A. You can use any device that
says MURS and it receives transmissions from other MURS
devices (the Customer Service callboxes, Wireless PA system
and Wireless Alert devices transmit only so they won't
work). Most people use the MURS Multi-Mile Intercoms or the
MURS Commercial base or handheld depending on their
Q. I want to use a MURS
Callbox to open a gate or door. What devices do I need to do
A. First you need a callbox that
has a gate relay. That relay is connected via two wires to
your gate or door. Plus you need either the MURS 110
Commercial Handheld Two-Way Radio or the MURS Commercial
Wireless Intercom. These devices have a button programmed on
them to operate the gate relay in the callbox. We have the
button pre-programmed so you don't have to do that The MURS Multi-Mile intercoms CANNOT be used to open a gate or unlock a door.
Q. How does the callbox hook
up to my gate or door so it can unlock it?
A. There are two wires that run
from the callbox to the gate or door. These wires are
connected to a relay in the callbox that acts like a switch.
That relay can be programmed to operate two different ways
when someone presses the open button on an intercom or
two-way radio. The default way is a momentary operation
where the switch is closed for one second when the button is
pressed and then it opens again. The second way is to have
the switch toggle alternately between open and closed when
the button is pressed.