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  • A 6xx SIP response is a catastrophic
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    SIP response codes – Difference between ‘603 Decline’ and ‘486 Busy Here’

SIP response codes – Difference between ‘603 Decline’ and ‘486 Busy Here’

While lecturing on SIP response codes, I’ve had several students ask for an explanation of the case usage for a ‘603 Decline’ and a ‘486 Busy Here’.

The short answer is that all 6xx responses will terminate SIP dialog, and any pending searches. Alternatively, a 486 response would indicate that the user is not available at a particular request-URI.

I have constructed a video that demonstrates the difference between these two responses. It might even answer a few questions you didn’t even know you had.

Examining the 486 ‘Busy Here’ and 603 ‘Decline’ SIP response codes

SIP Downloads *.pcap
This video mentions two accompanying […]

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    Acer Aspire One – OCZ Vertex II SATA II SSD – Ubuntu 12.04 – Grub Error – Cannot read disk

Acer Aspire One – OCZ Vertex II SATA II SSD – Ubuntu 12.04 – Grub Error – Cannot read disk

I recently purchased an Asus Aspire One NAV50 (532h-2789), I wanted to use it for writing, but found it a bit too small for that task. It sat around for a few weeks while I figured out what to do with it… and figure out I did. Turn it into a gaming emulation machine running Ubuntu 12.04, DosBOX, and ScummVM.

To peak the netbook’s performance, I upgraded the RAM to the (max) 2 gigs, and also upgraded the manufacturer’s 160 gig HD to a OCZ Vertex II SSD (SATA II & 120 GB). A video outline the details concerning this […]