Snom 300

[CloudKnight]

Hi All,

Anyone use or have any ideas:

• I've setup a fresh fusion install on a Debian 8 VM...install wen't well no problems.
• I've configured ssl on a subdomain using lets encrypt....all working well.
• GW / connection to sip trunk....all working.
• added my subdomain in advanced > access controls. and set to allow.
• added account to xlite, all connecting and working.
• setup default route to extension 001....all calls can now be made and received..

So this leaves me with the hardware phone, a snom 300, this is where the problem is.

• I have added device and mac details and selected the required template.
• I have then provisioned the phone, web interface for phone logs state it was provisioned OK.
• Under registrations it shows as registered.
• I can dial out from the phone to a normal mobile number and to another extension
• Phone will not ring on incoming call, but will ring on xlite.

 

[SBTech]

Sounds like a NAT setting, are the phone behind a NAT firewall?

Are they running a current firmware?

 

[CloudKnight]

phone is indeed behind NAT, and is running the latest Firmware, image attached.

 

[SBTech]

Sounds like the NAT is blocking the server.
I don't use snom phones but the setting is probably related to this.
http://wiki.snom.com/Settings/keepalive_interval

 

[EasyBB]

• I can dial out from the phone to a normal mobile number and to another extension

• Phone will not ring on incoming call, but will ring on xlite.

Can you post one INVITE to this phone from the server?
Is the received IP different from CONTACT IP?

If yes, first try this:
Under the phone extension in Fusion, click the advanced button and select "Rewrite Contact IP and Port" for "SIP Force Contact" field. Click save and test an incoming call.
Instead of rewriting Contact from Fusion, you may enable SIP ALG in the router where Snom is deployed. Make sure to use 5060 as local SIP port in Snom if you do.