search for: antenna

...NAT, but B is not. 3. A is not behind a NAT, but B is. 4. A and B are both behind NATs (different NAT of course). Among the four situations, 1, 2 and 3 works fine. (I guess externhost and localnet did the trick) But situation 4 does not work. In situation 4: When I call my friend, I get only one antenna bar with an exclamation mark. (I am not talking about the iPhone's wifi bar, nor carrier's bar. I am talking about Softphone's bar). But my friend has no problem with the antenna bar. And both of us cannot hear anything. When he calls me, now he gets one antenna bar and an exclamation m...

On Mon, Jan 9, 2017 at 12:04 PM, Frank Cox <theatre at melvilletheatre.com> wrote: > That sounds like a weak signal from your wifi transmitter. > Or signal interference. Where is the antennae located on the server? Ran into signal issues with antennae which were tucked behind the server before.

...postfixadmin Centos) I did define quota=0 in postfixadmin However suddenly a user with more than 9Gb of mail got his mailbox new/cur empty and maillog shows: Sep 3 15:43:56 mail16 dovecot: lda(brouwerb at scholarium.nl): Error: sieve: msgid=<alpine.LRH.2.20.1509031543050.16381 at streaming2.antenna.nl>: failed to store into mailbox 'INBOX': Quota exceeded (mailbox for user is full) Sep 3 15:43:56 mail16 dovecot: lda(brouwerb at scholarium.nl): Error: sieve: script /home/sieve/globalfilter.sieve failed with unsuccessful implicit keep Sep 3 15:43:56 mail16 dovecot: lda(brouwerb...

...> You can't get another provider as satellite dishes are limited in > covenants and restrictions (CCR). Those CC&Rs may very well be legally void and unenforceable. Some years ago, Congress passed legislation which affirms the right of individuals to install over-the-air television antennas, satellite-TV antennas, and "fixed wireless" antennas, in areas of their property which (1) they own, or (2) they lease or rent, and which are part of their "exclusive use" areas. The "exclusive use" phrasing covers areas like private patios, private walkways, balcon...

On 03/21/2017 05:51 AM, Scott Robbins wrote: > On Mon, Mar 20, 2017 at 05:09:55PM -0700, Robert Moskowitz wrote: >> I am looking for one of those very small USB wifi adapters for the server >> I am working on. I am tired of dealing with the 4" long TP-LINK I have >> and for my purposes, one of those little 1cm ones would do. But which >> work with Linux? When I

...so an old guy and didn't want to use the Rpi for this purpose. However, many years ago I turned off our land lines and had a Sprint femtocell in the house serving as the base station for our cell phones. My wife and I just used our cell phones as our main phones. For that to work a good GPS antenna was necessary (the little antenna which came with the femtocell just didn't work given the femtocell location and GPS signal). I chose an active Trimble Bullet III GPS Antenna requiring a 5V supply that was compatible with the femtocell and could be roof mounted. Once WiFi calling became av...

...rote: > On 1/9/2017 7:11 PM, fred roller wrote: > > On Mon, Jan 9, 2017 at 12:04 PM, Frank Cox<theatre at melvilletheatre.com> > > > > wrote: > >> That sounds like a weak signal from your wifi transmitter. > > > > Or signal interference. Where is the antennae located on the server? > > Ran into signal issues with antennae which were tucked behind the server > > before. > > indeed, the back of a desktop or server system, sitting on the floor (or > in a rack) surrounded by piles of cables, is the worst possible place > for a 2.4G...

...o > transmit. > > (21000 km from orbit to Earth surface vs ~3000 km from Fort Collins to > either Bangor, Maine or Miami.) It is insightful, yet... There are a bunch of other factors that may need to be taken into account. Angular transmission pattern of satellite (horn? or is it yagi? antenna) vs ground based (monopole? or dipole? antenna - which one is used there to transmit in HF?). Ground effect (attenuation) along the whole path or propagation for ground based HF vs ground effect only at the receiption point, but much higher for much higher frequencies of GPS; pre-amplifier Signal t...

...ct. (ok so I'm media-whoring) Any ideas as to how I can offer both Vorbis and mp3 streams with minimal reconfiguration of my existing setup will be greatly appreciated. The setup: At 10 night clubs: 10 old Mac G3s running Gentoo Linux, OpenSSH and Ices2 (from CVS). 10 Wifi access points / antennas. At the 'net end of things: 1 access point / antenna connected to an Apple Xserve running Gentoo Linux and Icecast2 (from CVS), as well as Apache, PHP, and OpenSSL. Thanks, David Rose webmaster, sxsw.com http://sxsw.com/ --- >8 ---- List archives: http://www.xiph.org/archives/ icecast p...

Sorry, forgot to mention: version 2.0.9 (dovecot.x86_64 1:2.0.9-19.el6.1) On Thu, 3 Sep 2015, Support Antenna wrote: > Dear all, > > On a new server (postfix dovecot postfixadmin Centos) > I did define quota=0 in postfixadmin > > However suddenly a user with more than 9Gb of mail got his mailbox new/cur > empty and maillog shows: > > Sep 3 15:43:56 mail16 dovecot: lda(brouwerb...

I'm trying to install a program from a CD-ROM that is included with a publication called the ARRL Antenna Book, 19th Edition which claims compatibility with Windows up to 2000. Running the setup program I get the following (I am executing it from the CD-ROM): $ wine ABSETUP.EXE Disabling HW TCL support Disabling HW TCL support Disabling HW TCL support Disabling HW TCL support wine: Unhandled page fau...

...a bit of a deep-dive on RF stuff, but maybe it will be useful to Chris] On 05/24/2017 12:20 PM, Valeri Galtsev wrote: > It is insightful, yet... There are a bunch of other factors that may need > to be taken into account. Angular transmission pattern of satellite (horn? > or is it yagi? antenna) vs ground based (monopole? or dipole? antenna - > which one is used there to transmit in HF?). WWVB uses a two-element phased array, where each element is a 400-ft top-loaded vertical monopole. The ERP is listed as 70kW, so the antenna gain is already applied to the transmitted signal's...

...et and DST > rules, which means additional software if you want it to track changes to > these things. There were 10 batches of such changes last year! > > https://mm.icann.org/pipermail/tz-announce/2016-November/thread.html > > b. It?s a weak signal. Unless you?ve got a big antenna or are positioning > the receiving device near a window, you probably can?t receive the WWVB > signal reliably. > > c. Computers have major RFI shielding problems, which is why they?re > typically placed in metal boxes. (Even plastic-cased laptops have metal > boxes inside.) Tha...

A few years ago, one of our interns was curious about system time keeping features in computer systems.? This intern was also the proud owner of an inexpensive Radio-Controlled Clock. The intern wondered why computer motherboards were not just equipped with a chip like the ones in the RCC so that their system time would always be correct. I posted a question about this on the CentOS email list

...se the Rpi for this purpose. PRGvs> However, many years ago I turned off our land lines and had a Sprint PRGvs> femtocell in the house serving as the base station for our cell phones. PRGvs> My wife and I just used our cell phones as our main phones. For that to PRGvs> work a good GPS antenna was necessary (the little antenna which came PRGvs> with the femtocell just didn't work given the femtocell location and GPS PRGvs> signal). I chose an active Trimble Bullet III GPS Antenna requiring a 5V PRGvs> supply that was compatible with the femtocell and could be roof mounted....

On 1/9/2017 7:11 PM, fred roller wrote: > On Mon, Jan 9, 2017 at 12:04 PM, Frank Cox<theatre at melvilletheatre.com> > wrote: > >> That sounds like a weak signal from your wifi transmitter. >> > Or signal interference. Where is the antennae located on the server? Ran > into signal issues with antennae which were tucked behind the server before. indeed, the back of a desktop or server system, sitting on the floor (or in a rack) surrounded by piles of cables, is the worst possible place for a 2.4GHz or 5.7GHz antenna -- john...

...On 1/9/2017 7:11 PM, fred roller wrote: > > On Mon, Jan 9, 2017 at 12:04 PM, Frank > > Cox<theatre at melvilletheatre.com> > > > > wrote: > >> That sounds like a weak signal from your wifi transmitter. > > > > Or signal interference. Where is the antennae located on the server? > > Ran into signal issues with antennae which were tucked behind the > > server before. > > indeed, the back of a desktop or server system, sitting on the floor > (or in a rack) surrounded by piles of cables, is the worst possible > place for a 2...

...to configure time zone offset and DST rules, which means additional software if you want it to track changes to these things. There were 10 batches of such changes last year! https://mm.icann.org/pipermail/tz-announce/2016-November/thread.html b. It?s a weak signal. Unless you?ve got a big antenna or are positioning the receiving device near a window, you probably can?t receive the WWVB signal reliably. c. Computers have major RFI shielding problems, which is why they?re typically placed in metal boxes. (Even plastic-cased laptops have metal boxes inside.) That means you have to have an e...

One of our STEM interns recently observed that there are inexpensive clocks that sync via radio to standard time services.? This begged a question about why every computer would not have a radio module to receive time.? Our senior staff did not have a good answer or if time from such a radio module would be supported by the operating system. When I was a student, such questions would have earned

...PRGvs> However, many years ago I turned off our land lines and had a > Sprint > PRGvs> femtocell in the house serving as the base station for our cell > phones. > PRGvs> My wife and I just used our cell phones as our main phones. For > that to > PRGvs> work a good GPS antenna was necessary (the little antenna which > came > PRGvs> with the femtocell just didn't work given the femtocell location > and GPS > PRGvs> signal). I chose an active Trimble Bullet III GPS Antenna requiring > a 5V > PRGvs> supply that was compatible with the femtocel...