Understanding the 800 MHz Radio Changes (October 2022)

There are two main changes to the 800 MHz radio system for October 2022:

  • Fleetmap change regarding PG County zone
  • FDTA change regarding tone and EB

Fleetmap Change

PG County has realigned zone 8 to match MCFRS when it comes to Ops and Dispatch.

  • 8A1 is now Ops
  • 8A2 is now Disp

FDTA Tone Gone

Effective with the upgrade to your radio, you will no longer hear a tone when you press your PTT on FDTA. This may take some time for people to get used to, but it was necessary with the other change (EB, below).

FDTA EB Available (but Limited)

The EB is now functional on FDTA, but not exactly likely it is on talkgroups that go through the trunked system. (Remember, FDTA is still a simplex channel, unheard by ECC.) Here are the basics:

  • What happens when I am on FDTA and activate my EB?
    • You effectively launch an EB activation.
    • You will hear a tone every 10 seconds.
    • ECC will not know that you have launched an EB and it is up to your incident commander to include ECC.
  • Will people who are scanning FDTA know that I have launched an EB?
    • Their radios will flash EA received (with your apparatus name and position, as shown in the example below), but it will only flash for them. It will then jump back to their TG(s).
    • They will not hear an extended tone.
    • The orange banner will rotate briefly between your apparatus name with riding position and your known location (if accessible, unlike the image below).
      EB on FDTA
  • What is the range on who will know I have pressed my EB?
    • This is no different than the normal range for FDTA. Line of sight is about a mile, but buildings and various building materials shorten that.
  • What if I press the EB accidentally? Is clearing the EB on FDTA the same as on any other talkgroup?
    • Yes, simply press and hold a few seconds until it clears.
    • There is no need to tell ECC, though.


Accessing EMRC via Radio

Notes from MIEMSS for Calling EMRC:

  • The initial call from the EMS unit should be “EMRC, this is <Jurisdiction Name> <Unit Number>.”
    • Do not expect EMRC to recognize NCR County codes. Multiple jurisdictions have unit numbers
      that start with 7 and 8.
    • While not mandatory, it is helpful to state during the initial call whether the provider is utilizing a UHF radio (EMRC Med Radio) or 800 MHz radio.
  • EMRC will respond and advise whether to go ahead with your request or to stand by.
    • Please do not make any requests until the EMRC operator acknowledges your unit number.
  • After EMRC has advised to go ahead with your transmission, state your request:
    • State the receiving hospital and whether a physician-consult is needed.
    • Noting if a physician consult is required will ensure that the EMRC brings an authorized
      consulting base station on the line. Some facilities are not authorized to provide online medical
  • EMRC will then direct you to a med channel for connection with the hospital.
  • Upon changing to the med channel acknowledge that you are on the med channel with your unit
    identifier: “<Jurisdiction Name> <Unit Number> online”.

    • This is important when using the conventional EMS radios. Your transmission is needed to steer
      the automated electronic system to the correct radio tower for your area.
  • 6. Once a hospital announces they are on line identify your unit and proceed with your request or report.
    • If you are unsure you have the correct hospital(s) online, have them confirm their facility name.

Some Additional Important Notes:

  • Remember, EMRC services many jurisdictions. The initial call should be brief.
  • Always use plain language and avoid abbreviations or codes.
  • State the full hospital name being requested.
  • Please be extra cautious with the following common miscommunications:
    • Howard University Hospital vs Howard County General Hospital
    • Washington Hospital Center vs both the Maryland-based Washington Adventist Hospital and Fort Washington Hospital.
    • EMRC is often confused when units request “PG Shock Trauma”. The operator may bring up
      BOTH Prince Georges Hospital Center (PGHC) and R Adams Cowley Shock Trauma Center.
      Refer to the PGHC Trauma Center as “Prince Georges Hospital Center”.
    • MEDSTAR Trauma Center vs Washington Hospital Center Adult Emergency Department. Like
      University of Maryland Hospital and Shock Trauma, these are two separate facilities with
      separate lines. Please either use “MEDSTAR Trauma” or “Washington Hospital Center”.
    • The Children’s facility at United Medical Center is a separate facility with its own consultation
      line. Please specify to EMRC that would like “Children’s at United Medical Center” or
      “Children’s at Southern Avenue”.
    • The Children’s facility at United Medical Center is not a recognized base station and cannot
      provide medical direction. Simultaneous consultation is required with both a physician from
      Children’s National Medical Center (CNMC) and the Children’s Facility at United Medical
    • CNMC utilizes their own radio operator to patch consults. Once EMRC connects a unit to CNMC
      you will be required to communicate your request a second time to the CNMC radio operator.

Finding the Right 800 MHz Radio Fleetmap

Looking for the right fleetmap? Please see the list below. Each link is a separate PDF, sized for an 8.5″ x 11″ sheet of paper. Please see below the list of links for a color-coded legend.

2023 Fleetmaps: 

800 MHz Radio Fleetmap Color Key

EB TG Shift

When you activate the emergency button (EB) on 7D, 7E or any secondary talkgroup (TG) in an incident block, the radio uses emergency revert, which means you radio will jump back to the primary incident TG in the block and activate the emergency from there.