Wireless Call Boxes

Range can reach up to one mile under ideal conditions, but actual performance depends heavily on the environment — walls, metal structures, and nearby equipment can interfere with the signal. For indoor use, UHF typically penetrates walls and obstacles better than VHF MURS. If you already use UHF two-way radios, a UHF callbox will provide similar performance. See the RT1103 UHF Compact Wireless Intercom Callbox, RT1122 UHF handheld radio, and RT1064 UHF base station — these can be configured to match an existing UHF setup.

Reliability can vary. A wireless callbox may perform fine in winter, when trees are bare, but struggle in summer once foliage is thick and blocking the signal path.

Yes. All MURS callboxes support external antennas. For better range, pair the RT1014 base station with an outdoor antenna, and mount it as high as possible for better line-of-sight.

A cellular intercom, such as the IO1038 or IO1125, is a good fit where cell service is available. Where line of sight is clear, radio-based callboxes like the RT1095 paired with an RT1014 base station can also work, especially with an external antenna.

Radio signals can bounce and reach farther than a straight-line distance would suggest, even across a few hundred feet with some concrete block or steel structures in the mix. For maximum range, an antenna upgrade — like a magnetic mount antenna with 25 ft of coax or an external mast antenna — can help close the gap.

They operates on MURS frequencies and only works with MURS radios — not every walkie-talkie is compatible. To activate the built-in relay for door or gate control, the radio needs a programmable button. The RT1116 MURS handheld has one and pairs with the RT1095 and RT1014 base station. UHF callbox options with a relay are also available here.

Yes, but the frequency and privacy code must match your company's radios. This usually requires programming software and a cable — or you can have the callbox pre-programmed by us to match your radios before it ships.

Yes, the RT1100 is a MURS callbox and works with MURS handhelds. See the "How to Build a System" graphic on the RT1100/RT1101 product page for compatible devices.

Most likely, depending on the radio type. Standard analog UHF radios pair with a callbox like the RT1105. Digital radios need a matching digital callbox — DMR radios use the RT1110. To confirm compatibility, contact IntercomsOnline with your radio's exact frequency and tone/color code — call 888-298-9489 or email [email protected].

The RT1116 handheld includes a dedicated gate-open button and works with both the RT1095 and RT1096. As an alternative, the BT1001 remote pairs with the RT1101 callbox (which does not include a built-in relay).

These are two-way radios, so any transmission is received by all radios on the same channel. Battery-powered callboxes go into sleep mode and won't hear ongoing conversations; with external power, they can be set to full intercom mode to stay awake at all times.

Yes, if the callbox includes a relay. The relay is a switch that can activate an electric door strike or gate controller.

Yes — typically just two wires run from the callbox to the gate controller, and the callbox provides the switch closure to trigger it.

Start with the RT1095 MURS wireless callbox on the gate side, paired with RT1095 MURS Commercial Wireless Intercom units for the interior stations. This configuration also supports remote gate operation.

Yes. The RT1095 includes a switch-out connection with a "Switch On When Active" setting — the switch stays closed while the callbox is in use and opens once it's been idle past its reset time.

Yes, a SIM can be added to an existing AT&T account instead of purchasing a new plan. The Cell Gate Intercom with Keypad connects directly to a gate controller with two wires — see details here. It requires power; a 24-volt solar panel kit is available for locations without easy power access.

Automatic exit can be handled with a wireless gate exit loop, listed under Other Products. Keypad entry doesn't depend on cellular service, so manual code entry keeps working even during an outage.

MURS offers 5 channels, so up to 5 independent pairs can run simultaneously, each on its own channel.

Standard callbox speakers are best when someone is within a couple of feet. For consistently loud environments, the ZT1032 noise-cancelling intercom is a better fit — it's hands-free and always-on, with three activation modes (button press, sensor trigger, or automatic answer). It's a wired (CAT5/PoE) system by default but can be converted to wireless.

The RT1101 MURS Weatherproof Intercom is built for that kind of exposure. Pressing the button sounds a tone on the receiving radios, which can be a handheld or a base station. Pair with the RT1095 if remote gate/door opening is also needed.

Yes, all of our callboxes without an LCD display work in extreme cold.

Yes — Canadian versions are available (shipped from the US), and they work with any Canadian cellular provider.

A cellular intercom with active service, such as the IO1123 Cell Phone Network Intercom, supports call transfer to a cell phone. It runs on GSM networks and works internationally, including Canada.

Yes — cellular intercom models can call through up to four numbers in sequence, moving to the next if there's no answer. The IO1115 and IO1125 are examples.

A video cell intercom such as the IO1052 or IO1125 works with separate cell service. If running CAT5 cable is possible (up to 326 feet), a video intercom can send calls to a phone app with no monthly fees, and supports iOS, Android, and optional in-home screens or tablets. Multiple users can access it from any WiFi or cellular network.

Not currently — WiFi intercoms in this lineup include video. For audio-only communication, two-way radio-based callboxes are the better fit.

Yes, the door release can be triggered from the app. There's no ongoing fee to use the app once the system is installed.

No monthly fee for single-tenant use (multi-tenant models may differ). Installation is app-based and considered straightforward.

For a simple call button with two-way voice the IO1123 WiFi/CAT-5 intercom works well.

Each outdoor unit (e.g., RT1101 callbox) is battery-powered and mounts directly to the equipment. Indoors, you can use a dedicated RT1014 base station, or mount an additional RT1101 to the wall using the RT1097 power cable and VS1002 power adapter, since an indoor unit typically stays plugged in.

They ship with side flanges for wall mounting. Pole mount options are also available — check the Related Items section on the product page.

Place an order on the website and select the "Quote" payment option at checkout. You'll receive an invoice by email — click the link in the invoice or call to complete payment. Nothing ships until payment is received.