Elastix 2.x / 4.x (chan_sip)
Configure the SIP Trunk on Elastix
Trunk setup in Elastix, very similar to Issabel. Elastix no longer receives updates: we recommend migrating.
Note: Elastix is discontinued and has no security patches. If it is exposed to the internet, protect it with a firewall and consider migrating to Issabel, FreePBX or the PortalPBX cloud PBX.
Before you start
- Administrator access to the Elastix web UI.
- Trunk details provided by PortalPBX.
Your trunk details
PortalPBX sends them when the trunk is activated. Replace each placeholder with your real value.
- SIP server (host or domain)
- <servidor-sip>
- Port and transport
- <puerto> · UDP / TCP / TLS
- SIP username
- <usuario>
- SIP password
- <contraseña>
- Assigned DID number(s)
- <DID>
- Authentication mode
- Registro / IP
- Enabled codecs
- G.711 (alaw/ulaw) · G.729*
* G.729 only if enabled on your trunk.
Step by step
- 1
Add a SIP trunk
PBX → PBX Configuration → Trunks → Add SIP Trunk. Name portalpbx and Caller ID with your DID.
- 2
PEER details
Use the same parameters as in Issabel:
type=peer host=<servidor-sip> username=<usuario> secret=<contraseña> fromuser=<usuario> fromdomain=<servidor-sip> insecure=port,invite qualify=yes nat=yes disallow=all allow=alaw,ulaw context=from-trunk - 3
Registration and routes
Register string <usuario>:<contraseña>@<servidor-sip>/<DID>; then create the inbound route per DID and the outbound route using the trunk.
- 4
Verify
Apply changes and check registration:
asterisk -rx "sip show registry"
Recommendations
- Prefer G.711 alaw/ulaw; use G.729 only if it is enabled on your trunk and supported by your equipment.
- Disable SIP ALG on your router or firewall: it is the most common cause of one-way audio and dropped registrations.
- If your PBX is behind NAT, set the public IP and local network, and open the RTP range your system uses.
- Restrict SIP access with a firewall and use long extension passwords to prevent toll fraud.
- Dial numbers in the format stated in your activation sheet (national or international) and check the caller ID.
Common errors
401 / 403
Credentials or unauthorized IP.
Registro intermitente
SIP ALG or NAT: disable ALG and check qualify.
Need a hand?
We configure it with you, remotely
If the manual setup does not work, contact support or open a ticket. We review registration, routes, codecs and NAT with you through a secure remote session.