After last night’s testing, we suspect the most probable cause of the performance problem at Mockingbird is a bad customer roof unit radio hashing our tower. We’ve exhausted all the minimally invasive tests we can run. Starting tonight, we’re running a Big Sleep test on all our Mockingbird subscriber units. Continue reading
Condensed version: We’ve narrowed down the Mockingbird Tower problem to RF noise that spikes periodically. Our tower equipment and configuration are clean and validated. We now need to perform after-midnight testing over the next few days that will result in brief (10-20 minute) interruptions of service for a number of the subscribers on this tower.
Details and analysis follow for the technically curious. Continue reading
Mockingbird Tower subscribers (only) will experience a short service outage of 15-30 minutes this afternoon (Saturday), as the tower is being taken down for regrounding and recabling work to help address the RF issues causing poor performance from this tower.
Subscribers homed to Mockingbird Tower (both Central and West) will experience a short interruption of service tomorrow (Tuesday) morning, as we rotate the mast down to replace the radio and pigtails for the Mockingbird Central antenna in order to attempt to alleviate our recent performance issues. We will also be correcting the tower’s cant at this time.
Should the problem turn out to be in the physical antenna itself (a much lower probability, but possible), time will be required to locate and ship a replacement for this unit, which appears to be in short supply due to a manufacturer merger. If this is the case, we’ll keep you informed via this blog.
We’ve determined that the radio card on Morristown Tower West is souring, delivering unacceptable performance to subscribers, and requires replacement. We expect a replacement unit to arrive today, and the replacement activity to occur between 3-5 PM, requiring a brief service outage of around 15 minutes. The West AP serves Morristown subscribers west of the ADOT traffic sign on eastbound US 60 out to the end of Quiet Hills Road (except for subscribers in that area served by Skip-In Ranch Tower). Subscribers served by Morristown South and East APs will not be interrupted.
CenturyLink will be performing software upgrades on its equipment serving our network sometime between 11 PM Thursday, April 6, and 5 AM Friday, April 7. The outage should be no more than ten minutes.
This announcement affects only subscribers of our towers located in Morristown and Wittmann. Subscribers of towers located in Wickenburg (including “postal Wickenburg”) will not be affected.
We are replacing the Network Operations Center router in Morristown with a faster and more powerful model. There will be a brief network interruption on the order of 10-30 minutes just after midnight Friday night (i.e., Saturday morning) to cut over power and cabling to the new router.
Subscribers served directly by our Rio Vista tower will experience a brief outage of 5-15 minutes early this afternoon (Tuesday, January 31), as the mast is rotated down briefly to replace a long-link radio.
We were quite pleased with the smoothness of today’s whole-network speed upgrade, coordinated between and performed by us and CenturyLink, resulting in under 60 seconds of downtime at 7:30 AM.
Our next task is to better distribute the additional speed among our towers. To that end, we’re spending Monday on upgrades to Easy Street and Mockingbird towers. Continue reading