Motorola XPR 5550 Desktop Microphone Button Left and Right

Motorola XPR 5550 Desktop Microphone Button Left and Right

My question is: The RMN5050 microphone I'm using for the radio has two buttons on it. The right-side "lightning bolt" button is the PTT button to transmit, but I can't figure out what the left-side "speaker icon" button does. When I try to push it, nothing appears to happen.

Does anybody know what the purpose of the left-side "speaker icon" button is?

See below for an image of the Motorola RMN5050 microphone I'm using:

RMN5068A Desk microphone HMN3000 Internal Switch

I have taken the bottom cover off to get at the dip switches without having a schematic.

The main problem with the new RMN5068A Desk microphone that replaced the HMN3000 is that it works with the Motorola mobiles but doesn't work with dispatch solutions such as the MC series desksets and the Commandstar lite console all of which are manufactured by CML. What we discovered is the mic DC voltage supplied by the mobiles is around 5 to 7 volts. The mic dc that the CML products supplies is almost 12 volts. The HMN3000 tolerated the higher voltage without affecting the mike audio. The new RMN5068A can't tolerate that higher voltage and causes the mic amplifier circuit to go into distortion.



What is the function of each dip switch in the mic?
How do you separate the front and rear covers on the mic?

Microphones : MotoTrbo Handheld Control Head

Motorola MotoTRBO HHCH Handheld Control Head Kit

Motorola XPR 5550

Motorola XPR 5550 403-470mhz 25-45w Analog/Digital MotoTRBO mobile radio with a Motorola RMN5127 4 way mobile microphone.

CPS Error 1687 on xpr5550

I just recently updated my CPS software to version 12.0 Build 642 on windows 10 and I was trying to update firmware. I connected the OEM cable to USB port and I could hear the computer making the sound that it was connected. I went to settings, connected devices and shows "USB Serial Device (COM4)". Shouldn't that say Motorola radio or something like that?

From the software I tried to read the radio but kept getting error #1687 Unable to detect applicable devices(s)

MOTOTRBO radios, poor audio AGC performance - SOLVED

An audio fix utility is now available. Link here (http://communications.support/threads/10106-AUDIO-FIX-for-all-MOTOTRBO-subscriber-radios)

It is a well-known fact MOTOTRBO radios have TERRIBLE audio AGC performance on both analog and digital. The DMR-MARC group even goes so far as to require all members on their network kindly disable AGC on subscriber radios, as AGC distorts the audio beyond belief.

Both original and the newer 2.0 series TRBO line have this problem. To date, there has been no resolution, other than suggestions to muck around with linear audio gain levels until you get it "just right". But this is inconsistent and everyone has different speaking habits. One setting does not fit all.

One of the projects I undertook this winter was to identify and correct the audio issues which affect the TRBO platform. I firmly believe aside from RF coverage, the most important thing on a system is the audio. If subscriber (or dispatcher) audio is poor, it causes many issues. Some of those issues are:

TinyURL was created! - Motorola xpr5550

TinyURL was created!
The following URL:
http://xpr5550.blogspot.ca/2017/02/motorola-keypad-microphone-rmn5127-vs.html

has a length of 77 characters and resulted in the following
TinyURL which has a length of 30 characters:

http://tinyurl.com/Motorolamic

https://motorolamic.blogspot.com