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ZOA atcs reports vscs landline to manila is unsatisfactory in that it is hard to hear and causes erroneous ring back.
| Attributes | |
| ACN | 694542 |
| Time | |
| Date | 200604 |
| Place | |
| Locale Reference | atc facility : zoa.artcc |
| State Reference | CA |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : non radar controller : radar |
| Experience | controller non radar : 23 controller radar : 23 |
| ASRS Report | 694542 |
| Events | |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Navigational Facility |
| Primary Problem | Navigational Facility |
| Situations | |
| ATC Facility | communication equipment : zoa.artcc |
Narrative:
The manila vscs landline (986) is unsatisfactory and may lead to an operational incident in area G at ZOA for the following reasons: 1) the line is sometimes weak; wherein it is difficult to hear the manila controller; even with the volume control setting at the highest level. 2) after a ZOA controller finishes with a call to manila approach control and hangs up; we receive an erroneous ring back; that will continue to ring until answered. Once answered; there is nobody on the other line. Sometimes the ring back occurs twice after hanging up. 3) on recent occasions; calls are mysteriously cut off in the middle of transmitting xfer of control information.
Original NASA ASRS Text
Title: ZOA ATCS RPTS VSCS LANDLINE TO MANILA IS UNSATISFACTORY IN THAT IT IS HARD TO HEAR AND CAUSES ERRONEOUS RING BACK.
Narrative: THE MANILA VSCS LANDLINE (986) IS UNSATISFACTORY AND MAY LEAD TO AN OPERATIONAL INCIDENT IN AREA G AT ZOA FOR THE FOLLOWING REASONS: 1) THE LINE IS SOMETIMES WEAK; WHEREIN IT IS DIFFICULT TO HEAR THE MANILA CTLR; EVEN WITH THE VOLUME CTL SETTING AT THE HIGHEST LEVEL. 2) AFTER A ZOA CTLR FINISHES WITH A CALL TO MANILA APCH CTL AND HANGS UP; WE RECEIVE AN ERRONEOUS RING BACK; THAT WILL CONTINUE TO RING UNTIL ANSWERED. ONCE ANSWERED; THERE IS NOBODY ON THE OTHER LINE. SOMETIMES THE RING BACK OCCURS TWICE AFTER HANGING UP. 3) ON RECENT OCCASIONS; CALLS ARE MYSTERIOUSLY CUT OFF IN THE MIDDLE OF XMITTING XFER OF CTL INFO.
Data retrieved from NASA's ASRS site as of January 2009 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.