FYI about cisco firmware:
http://www.cisco.com/warp/public/707/cisco-sr-20070821-sip.shtml
A.
On Wed, 2007-08-22 at 12:26 +0100, Adrian Marsh wrote:> Hi All,
>
> A question for those with Cisco 7940/60 SIP phones. I used to load
> POS3-06-03-00 Firmware to the cisco phones. A month or so ago, I ran
> some tests and found that latest 3.8.6 firmware worked well, and solved
> an issue or two on the phones.
>
> I've a number of users who work outside of the LAN. Our phones use DNS
> names to talk to A*k, so in theory, just enabling NAT makes the phone
> work outside the LAN (home users, remote users, etc). However, when we
> loaded the 3.8.6 firmware to these phones, we've found the phones no
> longer work outside of the LAN. Using Etherreal, we've found that the
> communication between the Phone and A*k breaks (A*k never sees the
> Register packets, but the phone does seem to send them. I'll post more
> detail if its needed, but I wondered if anyone else has seen this ? The
> size of the IP packet for register is different (larger on the 3.8.6),
> but the important content of the Register message seems the same. I've
> ruled out ISP/firewall interference, as its happened on a number of
> users.
>
> Obviously there are fixes in 3.8.6, so I don't want to downgrade the
> phones again, but I can't see why they'd fail...
>
> Adrian Marsh
>
>
>
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