FDNY September 11, 2001 WTC Attack

WARNING!

These radio transmissions are graphic!

Listen to history unfold before you. It will send chills through your body!

I obtained this from a former Motorola co-worker and friend in NY City.

These transmissions are not from a scanner these are

actual transmisssions from one of the many the FDNY logging recorders that were in place on September 11, 2001.

There is even a civilian that gets to a fire radio and crys for help!

Also, More information on this audio,

In the radio transmissions there are terms that you may not understand

So, This is the translation section

The word "K" or "Kay" is used meaning simply, "Over"

"10-60" Means Extreme Emergency/Disaster

"Box Alarm" followed by a 3-4 digit number is a specific preplanned designated location

Box alarms or grids are used by many FD's to simplify dispatching.

The "MCC" is a Mobile Command Center"

One FD officer tells the dispacher to initiate a "recall", this

means that all off duty firefighters are required to report

for duty because of some type of serious incident.

Also, it may seem like a lot of information is repeated from the trucks, well you're correct, It's because, by design the trucks can not hear each other they can only hear the dispatcher.

The simplest explanation is because at that time the FDNY radio system used two frequencies,

the mobiles transmitted on one frequency and the dispatcher transmitted on another which allowed the dispatcher to transmit and receive at the same time but not the vehicles. So, as a rule, the vehicles could not hear each other (there were few exceptions to this).

This was a 4-wire tone remote control system with Spectra-Tac voting.

You are hearing actual 'line audio' from the logging recorder input.

I will explain the meaning behind "K".

Back in the day,After the turn of the 20th century, before telephones were used widely

The City of NY had fire pull boxes all over the city, So

If your building was on fire, you ran out (If you were able)

to a box and pulled the alarm, In turn it sent an automated coded (Like Morse code) telegraph

message to the Fire station nearest the box that was triggered. The station received the alarm

and sounded out a number of bell rings and printed out a ticker tape with holes punched in it.

Ahhh , The ticker tape. It was basically an archive, At the end of the telegraph message the character "K" was sent

indicated a "Stop" or end of message" That way the FD knew there were no more rings to wait for.

There is a little more to this but I gave you the readers digest condensed version O"K"?

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FDNY 11 SEP 01

WTC Attack Unfolds

FDNY 11 SEP 01

WTC Attack II

FDNY 11 SEP 01

WTC Attack III

FDNY Radio Transmissions are property of FDNY and the City of NY All Rights Reserved

© Amateur Radio Station W5TXR and W5TXR 2010 All Rights Reserved

All references to "Amateur Radio Station W5TXR" and "W5TXR" the Amateur Radio Station W5TXR logo are registered trade marks ®.

For comments or questions about the

Amateur Radio Station W5TXR website

contact the Webmaster.