asterisk users - Apr 2005 - Sipura SPA-841 and firewall

I have an asterisk server and 4 Sipura phones behind a Linksys WRT54G
router. I have set the DMZ to the Asterisk server's IP so that it can be
seen from outside. I have a Sipura SPA-841 phone outside the router and set
to proxy to the public IP of the router. The outside phone registers fine,
dials fine, and I can hear the person speaking from inside the router, but I
cannot be heard.

Is there any explanation for this? Surely the DMZ allows all traffic to the
PBX?
This is driving me nuts.

Chris Mason

Just for future reference, I found the answer - I enabled Symmetric RTP: on
the Advanced SIP page.

Chris Mason
www.anguillaguide.com
 
> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com 
> [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of 
> Chris Mason (Lists)
> Sent: Thursday, April 28, 2005 6:22 PM
> To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
> Subject: [Asterisk-Users] Sipura SPA-841 and firewall
> 
> I have an asterisk server and 4 Sipura phones behind a 
> Linksys WRT54G router. I have set the DMZ to the Asterisk 
> server's IP so that it can be seen from outside. I have a 
> Sipura SPA-841 phone outside the router and set to proxy to 
> the public IP of the router. The outside phone registers 
> fine, dials fine, and I can hear the person speaking from 
> inside the router, but I cannot be heard.
> 
> Is there any explanation for this? Surely the DMZ allows all 
> traffic to the PBX?
> This is driving me nuts.
> 
> Chris Mason
> 
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>

Hi all.

I am starting to develop a voip solution with asterisk and sip and 100 
telephones with SIP .

I need the following features.

calls group
blind transfer
attended transfer ( supervised )
pickup groups
voicemail
record call

the "attended transfer" feature is very important, cause is an 
enterprise solution.


then the question... :(

a think that a PIV 3Gz with 2G ram and UW SCSI 200G is enough, but i 
need a phone that cover all features in an easy mode and as cheap as i can.

which Phone should i use.?

Help Please.

Best Regards.





C?sar Garc?a.
    Director de Sistemas, IdecNet S.A.
    Centro de Gesti?n de Red.
    Edificio IdecNet. C/Juan XXIII 44.
    E-35004, Las Palmas de Gran Canaria,
    Islas Canarias - Espa?a.
    Tfn:  +34 828 111 000 Ext: 340