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Topaz Logo

Midland Two-Way Radio
Synthesized RF Call Box
with Handset

CB-191 GAI-Tronics RF Call Box w/Handset

Sorry-This Item is No Longer Available - Parts & Accessories  continue to be OK.

Includes: FREE Programming
REQUIRES: Power supply, Antenna, Battery,
Optional pole mounting kit.

Lowest Price Guarantee
Visa, MasterCard, Discover and American Express Accepted
***Up to 16 Channels Programmed FREE***

$ Qty
VHF 148-174 MHz
GAI-Tronics CB191
5 Watt   12.5/25 KHz Ch Spacing

$ Qty
UHF 440-470 MHz
GAI-Tronics CB191
5 Watt   12.5/25 KHz Ch Spacing

$ Qty
UHF 400-430 MHz
GAI-Tronics CB191
5 Watt   12.5/25 KHz Ch Spacing

$ Qty
Call Box Only
GAI-Tronics CB191
5 Watt   12.5/25 KHz Ch Spacing
REQUIRES: SD-125 Series RF Module

The CB191 uses an internally mounted SD-125 Data/Voice Radio

SD-125V SD-125U Maxon Synthesized RF Data Link Module use in the CB-191 RF Call Box
Click for Info


Check out the Push-Button
CB190 RF Call Box

The GAI-Tronics CB191 Series RF Call Box works with the Maxon SD-125 series data radio. The Call Box is easy to operate with a Telephone 2-Way communication Handset built in to the box. The CB191 is ideal for golf courses, shopping mall parking lots, security gates and much more. This Weatherproof Telephone type Handset Call Box works great for adding security and informational communications to almost any area. Adding wireless communications to entry gates or other sensitive locations is easy and economical. Place one on the 9th Tee of your golf course so that golfers can call in food orders to the clubhouse in advance! Put your customers, tenants, visitors and employees at ease with simple and reliable communications at the push of a button.


  • Two-way RF Communications:
    Wireless convenience means no buried or overhead wires or conduit. Easy installation anywhere you need communications. Power supply required.
  • UHF and VHF Applications:
    148-174 MHz VHF
    450-470 MHz UHF - U2
    400-430 MHz UHF - U1
  • Uses Maxon SD-125 Series Radios
    The Transmitting and Receiving is done by a rugged Maxton SD-125 RF Data/Voice radio Click the  SD-125  page for more information
  • DTMF ANI Reporting:
    Call boxes can transmit the own unique ID or identification number so you always know which box you're in communications with. (optional)
  • CTCSS/DCS encode/decode:
    Quiet channel communications using SD-010  plug-in board  (optional)
  • Telephone Handset model:
    Goof proof and easy to use - push the button to speak, let go to listen. If you can use a phone you can use the CB191
  • Quiet Operation:
    Call Box remains silent in "sleep mode" until Handset button if pushed. No unwanted chatter.
  • NEMA 3 R Weatherproof enclosure:
    Rough environment ready.
  • Compact Design
     13.13"H x  9.39"W x 7.27"D
  • Vandal Resistant Design
  • Wall or Pole Mount
  • 12V DC Battery Operation
  • External Antenna Capable
  • 1 or 5 Watt Power Output
  • Power Save Mode
  • Synthesized Frequency Tuning
  • Programmable up to 16 Channels
    Programmable Wide/Narrow Band
  • Operates from 9.6V to 13.8 VDC
  • Complies with NTIA Specifications
  • Die-Cast Aluminum Transmitter/Receiver Housing
  • Time-Out-Timer Function
  • PC Programming via Software and Cable (optional)

Got a Question?

Tough Conditions are No Problem for Legacy RF Data Modules

Tough Conditions?
No Problem for GAI-Tronics RF Call Boxes

The electronic heart of the CB191 RF Call Box is the Maxon SD-125 series Data/Voice module. This compact internally mounted transceiver does the radio communications and data work for the call box. For more information and specifications regarding the SD-125 Data/Voice module click on the SD-125 image.



 Optional Accessories - Internal Antennas
Model # Description Price

 ACC-103  3" VHF 150-162 MHz Internal Mount Antenna BNC


 ACC-105  3" UHF 403-437 MHz Internal Mount Antenna BNC


 ACC-106  3" UHF 432-468 MHz Internal Mount Antenna BNC


 Optional Accessories - Power Supplies / Battery
Model # Description Price

 PS15VDC  Power Supply - 15 VDC Regulated / 85-264 VAC in
 (Note: weatherproof enclosure required if mounted outside)


 ACC-205  Battery Lead-Acid Type 1.2 Ah


 Optional Accessories - Mounting / Tools
Model # Description Price

 ACC-11  Pole Mounting Kit for CB191 Telephone Call Box


 ACC-12  Screwdriver for Tamper-resistant Screws
 (Note: required to access call box)


 Optional Accessories - Signaling
Model # Description Price

 560-080-0057  Expansion Lid Kit (required for signaling modules)


 SD-010  CTCSS Encoder/Decoder (requires 560-080-0057 lid)


 Optional Accessories - CB191 Programming
Model # Description Price

 XAC1000A  CARD Suit Programming Software (Windows-no NT) 


 XAC0004A  PC Programming Cable  WARNING!


 Optional Accessories - SD-125 Programming / Manuals
Model # Description Price

 ACC-2000  Interface Module for programming
  (Requires - QPA-4000, ACC-900 & QPA-1413 below)


 ACC-900  PC Programming Software (MS-DOS)  WARNING!
 (Includes 3-1/2 in Software Disk & instructions)


 QPA-1413  Plug-in 110V power supply (for use with ACC-2000)
 12 VDC 200 ma


 QPA-4000  PC Programming Cable


 680-100-2004  SD-125V / SD-145U Service Manual


General Specifications - Receiver/Transmitter Module
  Maxon VHF SD-125V2 Maxon UHF SD-125U1/2
Frequency Range 148-174 MHz 440-470 MHz U2
400-430 MHz U1
FCC ID Number F3JSD125V2 F3JSD125U1 (U2)
FCC Parts Parts  22, 74, 90, 210
Channels 1 to16 dip switch selectable
Channel Spacing 12.5 / 15 / 25 / 30 KHz
Channel Stepping

5 & 6.25 KHz

Channel Spread 26 MHz 30 MHz
Frequency Stability

5.0 ppm

2.5 ppm

Operating Temperature

-22 to +140 F (-30 to + 60 C)

Storage Temperature

-40 to +176 F (-40 to + 80 C)

Input Voltage

9V - 18V DC,  13V nominal

Current Drain @9V

56 mA Standby / 73 mA Rx / 1.8A Tx

Current Drain @13V 42 mA Standby / 63 mA Rx / 1.4A Tx
Current Drain @18V

32 mA Standby / 58 mA Rx / .9A Tx

Operating Rating

90 : 5 : 5 - Standby/Rx/Tx [max settings]

Dimensions [HWD]

4 5/8" x 2 7/16" x 1 3/16" [117 x 62 x 30 mm]


7.7 oz [218 gm]


Die-cast Aluminum

IC Certification Number

153 195 332

153 195 333A

ANSI/TIA/EIA-603 Receiver Specifications - Receiver/Transmitter Module
  Maxon VHF SD-125V2 Maxon UHF SD-125U1/2
Frequency Stability 5 PPM 2.5 PPM
Sensitivity (12dB SINAD) 0.28 uV VHF 0.35 uV UHF
Sensitivity (20dB Quieting) < 0.5 uv @ center channel
Selectivity 60dB (25 KHz) / 50dB (12.5 KHz)
Spurious Rejection




Audio Output

2.5V @ 600 Ohms; method < 10% THD level

Audio Distortion

< 5% @ 1 KHz

Hum & Noise

-40 dB

Input Impedance 50 ohms
ANSI/TIA/EIA-603 Transmitter Specs - Receiver/Transmitter Module
  Maxon VHF SD-125V2 Maxon UHF SD-125U1/2
RF Power Output.

1 or 5 Watts  per channel

Frequency Stability 5 PPM 2.5 PPM
Modulation 11K0F3E / 16K0F3E  / 19K6F3E
Spurious & Harmonics -60dBc
FM Hum & Noise


Audio Distortion <10% @ rated modulation
Modulation Limiting 2.5 KHz max. [12.5 KHz] ,  5 KHz max. [25 KHz]
Modulation Sensitivity 100 mV RMS   @ 60% peak dev.

Topaz logo covering Maxon and Legacy products
Topaz technology, today, tomorrow. The Maxon and Legacy brand products in this document portray our experience and dedication to the communications industry. With continued growth and new product offerings, we are ready to meet the challenges of tomorrow.
Your assurance of quality. We are very proud of our product quality and stand behind every product we sell with these three Quality Assurance Promises:
  • 2 Year Parts and Labor Warranty
  • 6 Month Replacement Program Quality
  • Parts Performance Guarantee

From manufacture, our radio products are certified to strict ISO 9002 quality standards by one or both of these internationally known agencies.

Note: Complies with NTIA Specifications
Note: Features and specifications subject to change without notice

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Copyright 2000-2015  Multec Communications / - All rights reserved. Do not duplicate without the express written consent of Multec Communications.
Shipping & Mail only - Note: returns require a RA# - see RETURNS  before shipping
Address...                      Note: warranty repairs only - see REPAIRS  before shipping

Multec Communications
319 Centre Ave.  #166
Rockland, MA  U.S.A.   02370-2613
781 294-4992 main
781 527-5004 fax (include return email w/fax)

Main 781 294-4992
- calling hours 11-5 EST  Monday-Friday for questions and tech support only...."Out of Area", "Restricted" and "Private Caller" calls may be blocked to avoid phone spam. Note: The main line is often very busy. Please place orders online using our secure e-commerce system. Save time...order online!

If you have questions about ordering please see  ordering information page  first. Phone orders slow processing time, increase inaccuracies and are not recommended.

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Note: Not responsible for typographical, photographic or pricing errors.
         All pricing and specifications subject to change without notice.