The UHF R100 Repeater Instruction (Service) Manual 9.5 MB PDF file This is the no-longer-available 6881078E15-O manual. The UHF R100 Repeater Instruction (Service) Manual - Improved 9.6 MB PDF file Same manual as above, but this copy has been optimized and had bookmarks added to easily and much more quickly navigate around the various …Repeater Builder MMDVM not receiving. Hi all, I have a repeater builders MMDVM that will not receive anything. I am utilizing two Motorola CDM750s in duplex mode. Under normal operations, using fm, dmr, and p25, no lights or activity show up on the dashboard. Going into MMDVMcal, It's showing that its receiving just fine with 0 or nearly 0% BER.Apr 11, 2019 · The Repeater-Builder STM32-DVM is, we think, the best MMDVM Modem board out there. It includes a powerful micro controller, lots of test points, a well-tested filter design, nice diagnostic LEDs, and a handy ‘clip’ light for easy RX level adjustment. We’d long talked about trying to stuff the Pi+PiHat STM32-DVM into the MTR2000’s card ... 3 TK-880/H 5. INSTALLATION PLANNING – CONTROL STATIONS 5-1. Antenna system Control station. The antenna system selection depends on many factors and is beyond the scope of this manual.Hello everyone! i'm looking to integrate a Kenwood TK-880-1 ver2 with a repeater controller.... I'm about to pull the trigger on a pair or 880s and just wanted to do a bit more research before i do. On some other models like TK-805D, there is a way to open it up and solder some connections for th...Today I demonstrate my 220 Simplex Allstar node using the RIM Alinco device from Repeater-builder.com. Here is a link to the device purchase page: http://w...Chapter 1 – The Mysterious Duplexer. The cavity duplexer is a very familiar part of both amateur and commercial two-way radio. On a typical two-way hilltop, cavity duplexers are as common as the forest of antennas that bristle from the towers. Most repeaters have one.Documentation STM32 DVM MTR2K docs Scott Shop Docs Index of products s repeater builder ||| STM32 DVM-MTR2K v.2 MMDVM Digital Voice Module The STM32 DVM-MTR2K is an integrated MMDVM modem and host on an easy-to-use plugin-card for the MTR2000.This document describes how to set up your MTR2000 for use …The RB-USB-RIM a USB to radio interface module used with Linux based PC software (AllStar) to create a PC based repeater controller with advanced VOIP linking capabilities. The RIM adds a few options over other USB to radio interfaces such as: Missing pulse detector for "PC control" sense. If the RIM loses communication with the PC, an output ...Does World Market take EBT? We have what you need to know about the store policy and how certain stores qualify to be SNAP-approved retailers. Some World Market stores (around 35%)...Follow the instructions found at https://wpsd.radio to upgrade to the latest binaries and dashboard configuration. When configuring WPSD to use the updated STM32-DVM-MTR2K, use the modem option STM32-DVM-MTR2k (GPIO v3+ 500000 baud). All other configuration options can be set as normal.A battery bank and the associated charger (optional) 2. Coax jumpers between RF components and the connectors (see 6,7 and 8 under "Construction") Antenna (s), plus any necessary mounting hardware. The feedline that connecte the antenna on the top of the tower to the equipment inside the building.When you think of Shakespeare you probably think of Romeo and Juliet, Hamlet holding a skull while he says, “To be or not to be,” and a photo of the Bard himself wearing some ruffl...This article will explain all the components of a repeater system. With an emphasis on duplexers and why a person would get one. Parts of a repeater system. A repeater systems contains 5 core parts. They are the power supply, Repeater, duplexer (optional), feed line, and a antenna (s). We will breakdown all of the parts in the next few … Repeater Builder Products - STM32-DVM-FAQ. Generic; DVM to generic 6-pin Mini-DIN cable connections. (PDF) YouTube video showing a DVM connected to a Kenwood TM-V71a via the 9600 baud mini-DIN port. Step 4: Create the container of your radio repeater. Step 5: Connect the RX and T. Step 6: Detach and reattach the antennas. Step 7: Turn on the radios and adjust the volume. Step 8: Test the radio repeater. Step 9: Place the radio repeater in the most appropriate area. Radio Repeater Functions.This question is about the ACE Elite™ Visa® Prepaid Debit Card (Pay-As-You-Go) @lisacahill • 10/19/20 This answer was first published on 10/19/20. For the most current information ...The Repeater Builder folks might be able to help you troubleshot their device better. December 16, 2022 KG4Y. I just stumbled across this - nice work, Rousseau! Some time ago, I purchased the RIM-Max-RB thinking I would collect the rest of the pieces to put up an Allstar repeater (with Echolink capability enabled as well). I have since …A 100,000-square-foot megamansion in Bel Air, Calif., is being built by film producer and real estate developer Nile Niami, who wants to put the property up for sale for a record-h...To access the top of the RF Tray or work on the control tray, first you have to unlatch the control tray. On the left side there's a plastic latch. Push the top inward or pull the bottom outward just a bit while lifting the left side of the plastic tray. Be very careful as you lift it all the way up.Purpose: This article takes you through a photo tour of the Motorola MSF5000 UHF station, in particular, these three units: A 110w digital-capable repeater in a 37-inch tall cabinet. A 75w digital-capable base station in a 26-inch tall cabinet. The control tray on a 110w analog repeater.The STM32_DVM_Mtr2k is a complete ready-to run solution that simply plugs into the middle card slot of your MTR2000 repeater. Pricing / Options: STM32_DVM_MTR2k: Special Limited Time Price - $225. This card is customized to be plug-and-play with a Motorola MTR200 repeater. (VHF or UHF) It makes for a nice, neat compact package.Index of /Kenwood Name Last modified Size Description : Parent Directory - bc/ 2018-12-22 08:46 - dsp/Repeater BuilderWelcome to the Amateur Repeater. Builders Home Page. So, you want to build an. Amateur Radio repeater. Hopefully we can help with. easy access to a lot of information. Radio Mods. Technical Data. Where to Purchase Equipment.Repeater-Builder is a free technical group (free to you - we pay for a premium group plan) available to people seeking information on building ham radio, GMRS, or commercial repeater systems. If you are a Spammer you'll not be able to post because all new members are moderated - so save yourself (and us) the time.Retevis RT97S GMRS Mobile Repeater. Retevis RT97P UHF DMR Repeater. After the repeater is set up in the right position, the final step is to test your setup. Follow the manufacturer’s instructions to program your two way radio. This includes setting up channels, squelch settings, and other features.I am using MMDVM , MMDVMHost and MMDVMCal from the M17_AX25_FM branch with Repeater Builder STM32 Blue and Black Boards. The MMDVM is compiled with MODE_ FM and MODE_ DMR only in config.h plus RSSI and leds.. I am using AccesssMode 2 ( COR and CTCSS) with a tone of 141.3 Hz in [FM] of …900 MHz Ham Band Modsfor Astro25 Radios CPS By Lou Meiss WA6EPD. General Information: I've used the Hex Workshop program for editing. All of the values are 8-byte, unsigned long, Intel format. The Astro 25 Portable CPS covers models XTS5000, XTS4000, SSE5000, XTS2500, XTS2000, ATS3000, XTS1500, MT1500, and PR1500 Radios. As a general rule in the USA, if the output frequency (transmit) of the repeater is below 147 MHz then the input frequency (listening) is 600 kHz lower. This is referred to as a negative offset. If the output is 147 MHz or above then the input is usually 600 KHz above. This is referred to as a positive offset. Repeater Builder is an informational help site owned by Kevin Custer W3KKC. This is the largest repeater information site in the world! We regret to announce that Robert W. "Bob" Meister WA1MIK passed away far before his time in June 2021.The SMD capacitor can be changed for a 4.7μF for data interfacing. This cable also has provisions for a MAX232 IC and 78L05 regulator for other RS-232 applications instead. TN-887b-AN Page 2 of 6 28 June 2005 Tait Electronics Limited Telephone: +64–3–358–3399 PO Box 1645, Christchurch, New Zealand Facsimile: +64–3–358–3903 support ...MCS2000 documentation found on Repeater Builder. At the end of this article I have also included a chart summary of each pin’s function. Honey, who shrunk the antenna connection? The smaller funny looking UHF style antenna connection on the MCS2000 radio is called, appropriately enough, a mini-UHF (female) connector.Apr 30, 2013 · Rich Reese WA8DBW. Rich built his first repeater over 30 years ago, and now has several in the east central OH. area operating from 2 meters to 2.4 GHz, some with remote bases on 10 meters to 1.2 GHz. Rich maintains several other amateur and commercial repeaters that belong to others operating in assorted bands. The IFR500, 1000, 1100 and 1200 were developed in the days of wideband = 30 KHz and narrowband = 15 KHz. They are still quite usable on 5 KHz and 2.5 KHz signals.There are now nearly 1600+ repeaters around the world connected by the internet through the internet radio linking project (IRLP) 24 hours per day 7 days a week. The most remote repeater on the system is on Antarctica. To call a repeater on the system you just dial a 4 digit DTMF code. About IRLP - From eHam.net. Isolation is a cumulative number, provided by the collective hardware that comprises a repeater. Individual units can have good and bad features, some of which can enhance the total, some are neutral, some can degrade the total. For example, a braided feedline instead of a solid corrugated feedline. RF jumpers with a loose weave braid versus a ... Repeater Builder MMDVM not receiving. Hi all, I have a repeater builders MMDVM that will not receive anything. I am utilizing two Motorola CDM750s in duplex mode. Under normal operations, using fm, dmr, and p25, no lights or activity show up on the dashboard. Going into MMDVMcal, It's showing that its receiving just fine with 0 or nearly 0% BER.The STM32_DVM_Mtr2k is a complete ready-to run solution that simply plugs into the middle card slot of your MTR2000 repeater. Pricing / Options: STM32_DVM_MTR2k: Special Limited Time Price - $225. This card is customized to be plug-and-play with a Motorola MTR200 repeater. (VHF or UHF) It makes for a nice, neat compact package.To access the top of the RF Tray or work on the control tray, first you have to unlatch the control tray. On the left side there's a plastic latch. Push the top inward or pull the bottom outward just a bit while lifting the left side of the plastic tray. Be very careful as you lift it all the way up.Oct 14, 2004 · Duplexers expect to see a 50 Ohm load on every port, and many transmitters, many receivers and some antennas are not. A duplexer is 50 Ohms only at resonance, anywhere else it is reactive. The attached feedline is 50 Ohms, and the receiver or transmitter is SUPPOSED to be 50 Ohms. With a canopy of trees in the foreground, this rural lane is a peaceful nature scene. Learn how to draw a rural lane in just five steps. Advertisement With a forest silhouette in t...Pin 8: IGN (IGNITION SENSE FEATURE) The VX-2100/-2200 may be automatically be switched to the STND-BY mode when the vehicle's ignition key is turned on. Maximum current is 20 mA. Pin 9 - 12: ACC1 - ACC4 (ACCESSORY PORT) These port features can be programmed via the CE82 programmer.The repeater control lets you create repeatable fields. Fields can be cloned, deleted, and sorted via Drag & Drop. Use the fields argument to set up the field controls.Oct 14, 2004 · Kenwood Service Center West 13030 Alondra Blvd., Suite 104 Cerritos, CA 90703-2257 Repairs Only: (562) 483-874 Fax: (562) 483-8749. Kenwood Service Center East 829 Lynnhaven Pkwy., Suite 130 Virginia Beach, VA 23452 Repairs Only: (757) 340-1702 Fax: (757) 340-6809 CLOSED in 2019. Hello Everyone, I finally have the radio mobile software working and I have a couple of questions for people who use it on a regular basis. I'm using it to map out our current clubs repeater coverage and looking at making decisions on potential antenna change outs and power adjustments with the Amplifiers to get better RX and TX balance.Repeater Builder - RIM and RIM-lite USB Adapters - Repeater Builder RIM; DMK Enginerring - URI Radio adapters - dmkeng.com; If you would like your commercial products to be listed here please send info to KB4FXC at gmail.com. User Tech Notes and interesting sites. Passing DTMF to an RC210 controller; KH2FI Allstar NotesOne package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola). This is a large and very visible forum.Oct 14, 2004 · Icom Information Index. Mike Morris WA6ILQ Robert Meister WA1MIK Click here or on the logo above for the main Icom web site. Contact information: West Coast Office: 12421 Willows Road NE Kirkland, WA 98034, U.S.A. Tel : 800-USA-ICOM (800-872-4266) Fax : (425) 454-1509 E-mail : [email protected]. East Coast Office: 17000 Commerce Parkway ... Repeater Builder Products - STM32-DVM-FAQ. Generic; DVM to generic 6-pin Mini-DIN cable connections. (PDF) YouTube video showing a DVM connected to a Kenwood TM-V71a via the 9600 baud mini-DIN port.DB Products / Andrew / Commscope Base Station Antenna Data Summary Sorted by Model Number. Compiled by Robert W. Meister WA1MIK. Column names and other abbreviations have the following meanings and units: Model: Model Number. Antenna Type: GP=Ground Plane; ED=Exposed Dipole. Freq: Operating Frequency in MHz. dBd: Gain over a dipole …As of December 31, 2020 the Quantar radios are no longer supported by Motorola. The Quantar ranges are as follows: VHF Range 1: 132-154 Mhz. VHF Range 2: 146-174 Mhz. Some specification sheets say 150-174 MHz. UHF Range 1: 380-433 MHz. UHF Range 2: 438-470 MHz.From: [email protected] <[email protected]> On Behalf Of Mike Naruta AA8K Sent: Sunday, October 3, 2021 3:49 PM To: [email protected] Subject: Re: [repeater-builder] Yaesu DR-2X Pros: Less expensive, runs 50 watts continuous, easy set-up, remote control can be locked into individual …OPERATION MANUAL FM/AM- 1200S/A COMMUNICATIONS SERVICE MONITOR 10200 West York Street/Wlchita,KS 67215 U.S.A./(316) 522-4981/TWX 910-741-6952Windows: Firefox is still a fantastic web browser, but it has gained a bit of bloat over the years. Light aims to alleviate this by stripping many components from the browser for a...Medicine Matters Sharing successes, challenges and daily happenings in the Department of Medicine Nadia Hansel, MD, MPH, is the interim director of the Department of Medicine in th...The Advanced Custom Fields Repeater Fields is a powerful feature, but displaying your content isn't always easy.Thankfully, Bricks Builder makes displaying y...Mar 15, 2023 · Inside the repeater builder, you can use any blocks, but there are some dynamic blocks that support retrieving repeated values. Dynamic Title (for titles) Dynamic Image (for image) Meta getter (universal block for getting different kinds of data. It also has support for custom prefixes, postfixes, icons, and data conversion to different formats). Sep 11, 2005 · Duplexers are the devices that allow a mobile telephone to operate like a wired telephone, with either or both people speaking at any time without using a microphone switch to enable the radio transmitters. REPEATERS Most radio systems today use repeaters located on top of buildings, towers or on hill tops. RepeaterBuilder.com. A vast repository of technical information related to repeaters.Astron makes a power supply for the MaxTrac / Radius LRA / GM300 series that has a sleeve on the top that the radio slides into. The SL-11-RRA supplies 13.8V at 11 amps. Click here for a photo. Note that the mid-power and high-power MaxTrac / Radius / GM300 radios have a 10% transmit duty cycle and that translates to 10 seconds of transmit and ...900 MHz Ham Band Modsfor Astro25 Radios CPS By Lou Meiss WA6EPD. General Information: I've used the Hex Workshop program for editing. All of the values are 8-byte, unsigned long, Intel format. The Astro 25 Portable CPS covers models XTS5000, XTS4000, SSE5000, XTS2500, XTS2000, ATS3000, XTS1500, MT1500, and PR1500 Radios.Bipartisan concern rises as key SBA official departs amidst looming changes to 7(a) Loan Program. Urgent need for stable leadership underscored. In an unexpected turn of events, Pa...Inside the repeater builder, you can use any blocks, but there are some dynamic blocks that support retrieving repeated values. Dynamic Title (for titles) Dynamic Image (for image) Meta getter (universal block for getting different kinds of data. It also has support for custom prefixes, postfixes, icons, and data conversion to different formats).Repeater Builder Products - STM32-DVM-FAQ. Generic; DVM to generic 6-pin Mini-DIN cable connections. (PDF) YouTube video showing a DVM connected to a Kenwood TM-V71a via the 9600 baud mini-DIN port.Welcome to the Amateur Repeater. Builders Home Page. So, you want to build an. Amateur Radio repeater. Hopefully we can help with. easy access to a lot of information. Radio … REPEATER BUILDER & EXPERIMENTER INFORMATION LINKS Links to web sites with repeater building tips, tricks, theory, information and techniques for the repeater user ... Medicine Matters Sharing successes, challenges and daily happenings in the Department of Medicine Nadia Hansel, MD, MPH, is the interim director of the Department of Medicine in th...Simply type in PRN2FILE C:\ (some file name).txt [Enter] and the program loads and returns to a C: prompt. Then run your RSS (or any other DOS program). It will think it has a printer attached. Then do your radio programming, including generating any printouts of the radio configurations.The NXU-2B at one end (usually the equipment end) is the server; the one at the other end (usually the operator end) is the client. The audio, RS-232, and status bits are …Folks mainly base their idea on what they see on the news and in entertainment. But what's the difference between psychopathic versus sociopathic behavior? You may have heard the w...Repeater BuilderOct 14, 2004 · Duplexers expect to see a 50 Ohm load on every port, and many transmitters, many receivers and some antennas are not. A duplexer is 50 Ohms only at resonance, anywhere else it is reactive. The attached feedline is 50 Ohms, and the receiver or transmitter is SUPPOSED to be 50 Ohms. Repeater Builder MMDVM not receiving. Hi all, I have a repeater builders MMDVM that will not receive anything. I am utilizing two Motorola CDM750s in duplex mode. Under normal operations, using fm, dmr, and p25, no lights or activity show up on the dashboard. Going into MMDVMcal, It's showing that its receiving just fine with 0 or nearly 0% BER.Step 4: Create the container of your radio repeater. Step 5: Connect the RX and T. Step 6: Detach and reattach the antennas. Step 7: Turn on the radios and adjust the volume. Step 8: Test the radio repeater. Step 9: Place the radio repeater in the most appropriate area. Radio Repeater Functions.Icom Information Index. Mike Morris WA6ILQ Robert Meister WA1MIK Click here or on the logo above for the main Icom web site. Contact information: West Coast Office: 12421 Willows Road NE Kirkland, WA 98034, U.S.A. Tel : 800-USA-ICOM (800-872-4266) Fax : (425) 454-1509 E-mail : [email protected]. East Coast Office: 17000 …If you find a radio that you’re interested in listed here on the Repeater-Builder.com website, you’ll usually also find a reference to the programming software. You need to be very specific though. For instance: Motorola made a number of variants of their popular MaxTrac mobile radio. The radios look very similar to one another. But eachMar 15, 2023 · Inside the repeater builder, you can use any blocks, but there are some dynamic blocks that support retrieving repeated values. Dynamic Title (for titles) Dynamic Image (for image) Meta getter (universal block for getting different kinds of data. It also has support for custom prefixes, postfixes, icons, and data conversion to different formats). This article will explain all the components of a repeater system. With an emphasis on duplexers and why a person would get one. Parts of a repeater system. A repeater systems contains 5 core parts. They are the power supply, Repeater, duplexer (optional), feed line, and a antenna (s). We will breakdown all of the parts in the next few …As of December 31, 2020 the Quantar radios are no longer supported by Motorola. The Quantar ranges are as follows: VHF Range 1: 132-154 Mhz. VHF Range 2: 146-174 Mhz. Some specification sheets say 150-174 MHz. UHF Range 1: 380-433 MHz. UHF Range 2: 438-470 MHz.900 MHz Ham Band Modsfor Astro25 Radios CPS By Lou Meiss WA6EPD. General Information: I've used the Hex Workshop program for editing. All of the values are 8-byte, unsigned long, Intel format. The Astro 25 Portable CPS covers models XTS5000, XTS4000, SSE5000, XTS2500, XTS2000, ATS3000, XTS1500, MT1500, and PR1500 Radios.Do you know how to draw a man in a bomber jacket? Take a look at our five steps and learn how to draw a man in a bomber jacket. Advertisement A bomber jacket and sunglasses has bee...As of December 31, 2020 the Quantar radios are no longer supported by Motorola. The Quantar ranges are as follows: VHF Range 1: 132-154 Mhz. VHF Range 2: 146-174 Mhz. Some specification sheets say 150-174 MHz. UHF Range 1: 380-433 MHz. UHF Range 2: 438-470 MHz.Documentation STM32 DVM MTR2K docs Scott Shop Docs Index of products s repeater builder ||| STM32 DVM-MTR2K v.2 MMDVM Digital Voice Module The STM32 DVM-MTR2K is an integrated MMDVM modem and host on an easy-to-use plugin-card for the MTR2000.This document describes how to set up your MTR2000 for use …Bipartisan concern rises as key SBA official departs amidst looming changes to 7(a) Loan Program. Urgent need for stable leadership underscored. In an unexpected turn of events, Pa...From: [email protected] <[email protected]> On Behalf Of avvidclif Sent: Tuesday, 23 February 2021 06:27 To: [email protected] Subject: [repeater-builder] Sinclair Q202GC Duplexers. I recently purchased a set of these cavities in the cabinet. These are the ones with a tunable notch on top of the cavities. I'm …
October 29, 2023. REPEATER BUILDER. Table of Contents. Cable Information. Documents / Resources. Read User Manual Online (PDF format) Download This Manual (PDF format) BUILDER STM32-DVM Bridgecom BCR Repeater. User Guide.. Amish stores in mio michigan
This circuit design was in use for eight years in the WB6ELR Repeater and the WB6GGL Repeater known as the Mount Baldy Machine. This is suggested for experienced Repeater/kit Builders. WB6JHQ Repeater Controller Kit. Features and Services Provided: ** Touch tone decoder on board. ** Remotely adjustable timers. ** Remote timer …This article will explain all the components of a repeater system. With an emphasis on duplexers and why a person would get one. Parts of a repeater system. A repeater systems contains 5 core parts. They are the power supply, Repeater, duplexer (optional), feed line, and a antenna (s). We will breakdown all of the parts in the next few … Assembled for Repeater Builder ™ by Robert W. Meister WA1MIK (SK) Click here for the Test Equipment manual repository. Motorola manual collections: Index #1 Index #2 Index #3. Click here for the Kenwood files index. Click here for the Codan files index. Click here for the Tait T800 files index. Click here for the Tait TB8100 Bible index. RB's STM32_DVM & TKR750 Model 1. Just got one of Scott's MMDVM's and and TKR cable and I'm trying to get it set up for DMR & P25 at first. What I'm finding is all the published info is for the model 2 TKR including the sample code plug (or whatever Kwood calls it). First I compared the sample TKR 850 model 2's programming with the KPG 66 I …They're instantly recognizable for their yellow color. We're talking about legal pads. So who decided they'd be yellow, anyway? Advertisement Comic Jerry Seinfeld, former national ...Definition of a duplexer: A device which allows a transmitter operating on one frequency and a receiver operating on a different frequency to share one common antenna with a minimum of interaction and degradation of the different RF signals. Duplex Operation Duplexers are often the key component that allows two way radios to operate …frequency is outside the band, use TX Idle = TX Freq + 50 kHz. 3. The TX Idle frequency must use the same VCO as the TX frequency. ranges shown below, the TX Idle frequency must be in the same area. Setting the MTR-2000 idle frequency - necessary on simplex, convenient on a repeater.Kenwood repeater model numbers are TKR-7xx, NXR-7xx or NXR-1700 for VHF / highband, TKR-8xx, NXR-8xx or NXR-1800 for UHF, and TKR-9xx for 900 MHz. NXR-1700 / NXR-1800 Information and Modifications. This is the current production unit that can fit two independent units in a one rack unit (1 RU) vertical space (1 3 ⁄ 4 inch). MCS2000 documentation found on Repeater Builder. At the end of this article I have also included a chart summary of each pin’s function. Honey, who shrunk the antenna connection? The smaller funny looking UHF style antenna connection on the MCS2000 radio is called, appropriately enough, a mini-UHF (female) connector. Sep 11, 2005 · Duplexers are the devices that allow a mobile telephone to operate like a wired telephone, with either or both people speaking at any time without using a microphone switch to enable the radio transmitters. REPEATERS Most radio systems today use repeaters located on top of buildings, towers or on hill tops. Read Greg Stone's experience aboard business class on Qantas' Airbus A330 from Bangkok to Sydney. From seats to meals, see what it's like to fly Qantas. We may be compensated when ...It's called fusion ignition and it could one day pave the way for clean energy. We talked to a nuclear physicist who explained it all. Advertisement American scientists have announ...This is the Motorola mobile key, price was $2.04 in early 2006. Years ago life was simple: the 2135 was exclusively for mobiles, the 2553 was exclusively for base station and repeater cabinets. Not any more. These days you need both as the 2135 is being used on cabinets as well..