The device may also be doing RTP fixup, I guess. SIP uses RTP for the audio.

Rodrigo P. Telles wrote:
Hi Eric,

Thanks every body that answered about this problem.
About change de default SIP port (5060), I tried it at first and the UAC
could authenticate but when I made a call and another side pick the phone up
DSLink 200E freeze again.
ie. there wasn't any port 5060 on transactions.
I will have this DSL modem on my LAB asap and I will give feedback to the list.


Thanks

Eric Wieling aka ManxPower escreveu:


On Cisco routers you can do something like "no nat sip fixup 5060" and that will disable only the special SIP related nat features, but leave in all of the other NAT features. If a vendor does not include a similar ability in their SIP aware router they should be shot.


--Eric

C F wrote:

I have this problem with Best Data DSL Modems, If I disable NAT (on
the router, not in SIP) it works fine. You might be able to do the
same just disable NAT and it will work, if you disable NAT then you
will have to get a different router to be able to share the same IP,
and if you use PPPoE you might not be able to do it, in which case you
will have to get a different DSL modem.


On Wed, 29 Dec 2004 20:00:28 -0600, Eric Wieling aka ManxPower <[EMAIL PROTECTED]> wrote:

Rodrigo P. Telles wrote:

Hi Folks,

I've been having troubles with a DSL router (DSLink 200E) and SIP phones.
When I put any SIP phone (software or hardware) to work behind
that DSL router, it completely freeze.
I ready tech specs of that DSL router and it says that SIP protocol is
supported.
ie. I tested two DSLink 200E with the same results.



Turn off SIP support and let the generic NAT deal with it.
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