[cisco-voip] Cisco 7941G - but how?

[Bernd Ueberbacher]

Hi everyone!

We buy all our Cisco stuff from a local Cisco Gold Partner (pretty large 
company with three letters... *G*) and they love me so much, that they 
gave me a 7941G for free! :-) I once said that those phones seem pretty 
nice and well, they remembered that. That also remembered that we use 
SIP, so I got the SIP firmware and that we never bought a PoE switch, 
which means I also got the PS ;-)

After about six hours messing around with the xml config I read that it 
might not work because of the symmetric NAT...

 From voip-info.org:
"Most consumer VOIP services, including providers that support Cisco 
79x0 model phones, will not work with 79x1 phones without intervention 
on the provider side. Because the 79x1 phones send SIP messages from 
arbitrary high number UDP ports (e.g. 49000+) the symmetric NAT approach 
used by Asterisk (nat=yes) and most VOIP providers does not work with 
these phones."

Our PBX is outside the LAN!
Is there any way to get this phone to work? I just have the phone, a SIP 
account outside the LAN, a 2610 on my LAN, a standard POTS line, ... and 
somehow I wanna make use of this standalone phone in the easiest 
possible way *G*



Thanks,
Bernd

PS: As you might see, I'm absolutely new to VoIP! My one and only 
contact to VoIP products was unpacking the 7941G ;-)