SPA phones deregistering seemingly randomly

We have a separate network set aside for our IP phones. The only thing beside the phones is a server to log into the phones through http.
There are potentially 60 (48 plugged in right now) phones, each of which registers via SIP to a remote server. Most of the phones are SPA 508G but some are SPA 525G.
We have a SG500-52P-K9-NA switch, connected to a RV180-K9-NA router. We are on a cable modem connection with 35 mbps DL speed and 5 mbps UL speed.
Right now, as we connect new phones, some of the old phones deregister. When we then take these phones and plug them into a different network, by themselves, they re-register. We plug them back into our network, and then a different phone deregisters.
I ran wireshark and got some 401 Unauthorized responses on SIP. But since the phones are re-registering when plugged into a solitary network, clearly the authentication parameters are correct.
Could it be bandwidth? Perhaps a firewall issue? There seems to be no clear pattern as to which phones will deregister.
EDIT: I have added the packet captures from wireshark.

Wrong forum, post in "small business voice - SPA phones". You can move your post using the actions panel on the right.

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Latest update causes seemingly random crashes

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Why does text on certain portions of websites, usually when adjacent text contains special characters, become jumbled into seemingly random sets of characters that are not in any way jumbled when viewing the source of the webpage? How can I fix this?

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[http://img408.imageshack.us/img408/9564/firefoxcharencodingissu.jpg]
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[http://img822.imageshack.us/img822/9564/firefoxcharencodingissu.jpg]
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Helvetica Neue abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
</nowiki></pre>
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(Illustrator CS6) Spacebar stops working seemingly randomly

This is an infrequent issue I've had, but it has happened more than once in the last few weeks that I've been using CS6 on a regular basis:
On occasion, my spacebar will just stop working in Illustrator CS6, so I can't use the hand tool or zoom or… you know, type, basically making Illustrator unuseable. Now, I'm PRETTY sure it has nothing to do with my actual keyboard, because the spacebar will continue to work just fine in every other application even after it does this.
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I am having this problem as well, but happening quite frequently.
Also having Illustrator crashing a lot randomly as well.
Tried 32bit as well - same issue.
I've deleted settings as well - same issue.
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Seemingly random errors (Class Loading)

Hi,
I wonder if anyone out there could help me or point me in the right direction to solve this problem im having.
For a Uni project I am writing a Java application that takes three components stored in seperate Jar files (GUI, AI, and Model) dynamically from user defined locations by a central loading class.
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Each has a loading class defined in a MANIFEST.MF file within each Jar file and these are in turn defined by interfaces within my central loading program.
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Cheers in advance.
Matt
links
Main loading class: http://rex.homeip.net/~matt/java/loader/src/loader/Loader.java
Class Loader: http://rex.homeip.net/~matt/java/loader/src/loader/setup/SetupManager.java
GUI: http://rex.homeip.net/~matt/java/gui/src/gui/Gui.java
GraphViewer: http://rex.homeip.net/~matt/java/gui/src/gui/GraphViewer.java
Span: http://rex.homeip.net/~matt/java/gui/src/gui/graphs/Span.java

I think I have the solution....
I had the same exact (seemingly random) ClassFormatExceptions being thrown from my custom Class-Loader as well. I would get the same variety of debug prints as you (Invalid constant pool, Code segment has wrong length, etc). At times it seemed to happen randomly to different classes that I loaded, depending on small changes I made to the code.
Here is the background and how I solved it.
I dervied from ClassLoader to make my custom class-loader. I overrode the findClass() method, and NOT the loadClass() method. This is the Java 2 method of making class-loaders, which is simplier than implementing your own loadClass() as in the older Java 1.1way of doing things.
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JarEntry desiredEntry = // assigned to the JarEntry that represents the class you want to load
InputStream myStream = myJar.getInputStream( desiredEntry );
Then I asked how many bytes were available for reading, I created a byte array that could hold that many bytes, and I read the bytes from the InputStream:
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byte[] classBytes = new byte[totalBytes];
myStream.read( classBytes );
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myStream.read( classBytes );
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There is another version of the read() method that takes an 'offset' value into your array and a max bytes to read value. I used this method to modify my code to look like:
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int numNeeded = total;
int numRead = 0;
int offset = 0;
byte[] classBytes = new byte[total];
do
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numRead += inStream.read( classBytes, offset, numNeeded );
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Hope this helps!
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Spa phone searching for spaM:A:C semicolons! in its filename

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<Profile_Rule>tftp://ipaddress/xml/spa$MA.xml</Profile_Rule>
the phones are looking for:
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Well, the $MA macro should expand to MAC with no colons. And it work this way on all firmware versions I meet. So unless it's a bug specific to 7.5.2 version, it should work. I can't test this particular case as I have no phone with 7.5.2 firmware.
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<Upgrade_Rule ua="na">($SWVER ne 7.5.3)? tftp://ipaddress/sw/spa50x-30x-7-5-3.bin</Upgrade_Rule>
Wrong. It's not possible to upgrade pre-7.5.2b version to post-7.5.2b version directly. You should upgrade to 7.5.2b first. Read release notes. Also, you should consider upgrade to latest (7.5.6) version rather than to somewhat ancient 7.5.3.
Mark thread as answered if it answered your questions. It will help others to found solutions.

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SPA phones are not registering

hi people
i have UC 540 and i ahve one SPA504G and SPA 525G phones, when i turn on phone it gives message on screen "Downloading XML efault.cnf files" and it stays in this order until i reboot the phone and on 525G its getting main screen but not registering , just a clean front screen showing.
also same phones are registering on my other UC 540 device
kindly help me out
i have CME 8.6 installed
thanks in advance

Hello Khurram,
Jeffrey makes a valid point, either you have faulty handsets or their operating system has become corrupt.
You can either try and reset the units back to factory defaults and then plug them back into the phone system (Best to do this off a power pack with the SPA phones) and then have the phones attempt to reinitialize themselves again.
Or you can just contact SBSC and have them guide you over the phone, and if the issue still remains they can assist you with the RMA process over the phone.
Cheers,
David Trad.
**When you rate a persons post, you are indicating a thank you or that it helped, but at the same time you are also helping to maintain the community spirit - You don't have to rate posts and you wont be looked down upon **

SPA phones deregistering seemingly randomly

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