Hi all,

In an attempt to add VoIP to my home network, I'm working with Freeswitch and FusionPBX.

My outbound connection to the PSTN is via an aging SPA-3000, and whilst I can get the SPA-3000 to register correctly as a "user", I can't get the "gateway" side of things in FusionPBX/Freeswitch to register with the SPA-3000 for outgoing calls.

All of the articles I can find online relate to the SPA-3201 or similar, which is a very different beast to the SPA-3000.

The error in the logs is as follows:

2021-02-20 08:53:57.680948 [NOTICE] sofia_reg.c:454 Registering b1039375-091b-478c-86e4-11a25d3c9d00
2021-02-20 08:54:00.820948 [ERR] sofia_reg.c:2470 b1039375-091b-478c-86e4-11a25d3c9d00 Failed Registration with status Service Unavailable [503]. failure #35
2021-02-20 08:54:01.700955 [WARNING] sofia_reg.c:511 b1039375-091b-478c-86e4-11a25d3c9d00 Failed Registration [503], setting retry to 30 seconds.

and my settings look like this:

Gateway: outbound
username: 1900
password: 1234
From User: <my landline number>
From Domain: <BLANK>
Proxy: <IP ADDRESS OF SPA-3000>:5060
Realm: <IP ADDRESS OF SPA-3000>
Expire Seconds: 800
Retry Seconds: 30
Distinct To: <BLANK>
Auth Username: user
Extension <Blank>
Register Transport: <BLANK>
Register Proxy: <IP ADDRESS OF SPA-3000>:5060
Outbound Proxy: <IP ADDRESS OF SPA-3000>
Caller ID in From: True
Suppress CNG: <BLANK>
Sip CID Type: <BLANK>
Codec Preferences: <BLANK>
Extension in Contact: <BLANK>
Ping: <Blank>
Ping Min: <Blank>
Ping Max: <Blank>
Channels: 1
Hostname: <Blank>
Domain: Global
Context: Public
Profile: External
Enabled: True
Description: Blank


I'm sure this is something really obvious that I'm missing in the settings, so all help is appreciated!

Thanks in advance,

Matt