[Asterisk-Users] Aastra 9133i and NAT: Can it work?

[Robert La Ferla]

Jamie J. Begin wrote:
> I've been pulling out my hair all day on this one. If anyone can help,
> I'd really appreciate it. :-(
>
> I've got an Aastra 9133i (with the latest firmware version) and a Cisco
> 7960 sitting behind a NAT device on my LAN. The Asterisk server is
> hosted offsite and has a public IP address. 
>
> I've set up port-forwarding on the firewall for both phones to tunnel
> the SIP messages initiated by the Asterisk box. It works like a charm
> with the Cisco phone by using the following config info: 
>
> voip_control_port: 5077
> nat_enable: 1
> nat_address: ""
> nat_received_processing: 0 
>
> Every time the Cisco phone registers with Asterisk, it does so using
> port 5077 and with the corresponding port-forwarding rule added to the
> firewall, it works great. However, for the life of me, I can't get the
> Aastra to do the same thing. I thought that should be able to do it by
> using "sip nat port: 5078" in the Aastra config file, but no dice.
> Incoming calls work for about two minutes after the phone is rebooted
> and then it loses its registration.
>
> Any suggestions?
>   
Using your browser, type http:// plus the IP address of the 9133i and 
login to the phone.  Then select "Global SIP" from the menu.  Go down to 
the Registration Period and put 100 in it.  That should fix it.  If not, 
try the NAT settings under the Network menu.  If it still doesn't work 
post your settings so everyone can look at them.  BTW - I have a 9133i 
working behind a NAT but * is also behind it.