B757 flight crew concerned with mdsq ATC service and frequency congestion.

Attributes
ACN	530316
Time
Date	200111
Day	Fri
Local Time Of Day	0601 To 1200
Place
State Reference	FO
Altitude	msl bound lower : 28000 msl bound upper : 31000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : mteg.artcc artcc : mdsd.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	530316
Person 2
Affiliation	company : air carrier
Function	flight crew : captain
Events
Anomaly	non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : unable other
Consequence	other
Supplementary
Problem Areas	Airspace Structure Environmental Factor ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure

Narrative:

Mdsd center frequency is too concerned. Hi altitude and approach traffic all fighting for clrncs on same frequency and there is mass confusion. Vdsd needs to separate high and low altitude traffic on different frequencys. Mdsd cleared us to FL310 over veska. New voice on same frequency asked us to confirm level FL280. Said no, we are FL310. Was left at FL310. Never got radar contact with mdsd. Frequency was jammed almost continuously until we entered mteg airspace. Stayed at FL310 as cleared through mteg into mia airspace. Callback conversation with reporter revealed the following information: reporter has received no additional information from company. Recent transitions through mdsq have been without incident.

Original NASA ASRS Text

Title: B757 FLC CONCERNED WITH MDSQ ATC SVC AND FREQ CONGESTION.

Narrative: MDSD CTR FREQ IS TOO CONCERNED. HI ALT AND APCH TFC ALL FIGHTING FOR CLRNCS ON SAME FREQ AND THERE IS MASS CONFUSION. VDSD NEEDS TO SEPARATE HIGH AND LOW ALT TFC ON DIFFERENT FREQS. MDSD CLRED US TO FL310 OVER VESKA. NEW VOICE ON SAME FREQ ASKED US TO CONFIRM LEVEL FL280. SAID NO, WE ARE FL310. WAS LEFT AT FL310. NEVER GOT RADAR CONTACT WITH MDSD. FREQ WAS JAMMED ALMOST CONTINUOUSLY UNTIL WE ENTERED MTEG AIRSPACE. STAYED AT FL310 AS CLRED THROUGH MTEG INTO MIA AIRSPACE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR HAS RECEIVED NO ADDITIONAL INFO FROM COMPANY. RECENT TRANSITIONS THROUGH MDSQ HAVE BEEN WITHOUT INCIDENT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.