New CMED frequency

[havmedic26]

Does anyone have the new CMED interop frequency for use between different ambulance companies and cmed, presumably during a major indecent. I believe that some people are calling it Med 10-2. Any help is greatly appreciated.


Thanks,

JT
K9WFD

 

[ecps92]

See this Thread

Does anyone have the new CMED interop frequency for use between different ambulance companies and cmed, presumably during a major indecent. I believe that some people are calling it Med 10-2. Any help is greatly appreciated.


Thanks,

JT
K9WFD

 

[Citywide173]

Depends on where you are. BAMA is in use in Region IV, and MED 102 (not 10-2) is being implemented in Region III....I would assume with the introduction of the narrow band channels each Region will implement their own.

 

[cmed325]

just a quick answer,the region 3 ems mutual aid freq is 462.9875 pl 123.0,there are currently 31 cities and towns tied in(including fire dist 5/6/15) the radio test is done on fridays at appx 11;30 am.all 911 providers in region 3 will be included in this system as the radios continue to be installed.the new cmed channel plan is out and once its put into place region 3 will use just 1 p,l.number,and not 2 like they currently use.(probaly a year away) it will be made up of 20 frequencies instead of the current 10.all 5 cmed in massachusetts will have their own group of channels to operate on to reduce co-channel pblms etc.

 

[Citywide173]

all 5 cmed in massachusetts will have their own group of channels to operate on to reduce co-channel pblms etc.

This already exists....Channel assignment order has been around since the Statewide Communications Plan of 1985. Common Calling, Critical, Shared and Overflow channels are already assigned for every region, it's just that no one pays attention to them. Region IV is supposed to be Critical: MED 3, Shared: MED 6, MED 8, MED 5 and Overflow: MED 7, MED 1, MED 2 in that order, as 7, 1 & 2 are the critical channels for the adjacent regions. I actually just gave this info in a lecture to the new Boston EMS Recruits, and know that I'm probably the only person in the state that follows it religiously.

http://www.mass.gov/Eeohhs2/docs/dph/emergency_services/radio_communications_plan.pdf This is the newest version of the Communications Plan, and it's done away with the differentiation of Shared and overflow channels, making them all shared-which leads to problems as no one pays attention to the possibility of interfering. Just about every time I have sat down at the console, I have found the Burlington Base set on MED 7, which is one of Region III's critical channels (Old North Shore C-MED Critical). I change it, but others, who were never trained properly just change it back, rather than actually manage the system when they're sitting at C-MED.

Don't expect anything to change with the implementation, as most C-MED Operators have no idea (or possibly don't care) that their channel assignments have ramifications to adjacent regions.

 

[Citywide173]

After reading the Communications Plan again, it appears that Region III's use of 462.9875 is in violation of the policy, as it stipulates that Base Stations may not operate co-channel, or narrow band adjacent to a wide band channel, when that channel is used by another region's base station and the two stations' 39 dBu Contours intersect. Real time inter-C-MED communications, on a case by case basis may permit this closed space sharing Since Metro-Boston C-MED has allocated 462.975 as a dispatch channel, and awarded that channel to Boston EMS, Regions II, III, and V shouldn't be utilizing 462.9875 in narrow band mode, as with 250 watts from downtown, the Contours most definitely intersect with Regions III and V and most likely intersect with Region II.

 

[cmed325]

the new communications plan is right next to me(next to the old one, sept 85)my hopes are with the increased channels the co-channel from boston cmed will cease.the only real issue i see is the one p.l. number for merrimack valley/north shore communications.stay tuned.