ASTERISK WITHOUT THE GUESSWORK
UK SIP and IAX2 trunks for Asterisk.
Connect Asterisk using PJSIP registration, IP-authenticated peering or IAX2. Choose the method that fits your network and keep control of the dial plan.
- PJSIP registration
- SIP peering
- IAX2 registration
- TLS and secure media options
- Provider-side service diagnostics
THREE CONNECTION METHODS
Use the Asterisk connection you prefer.
Every method uses the same Sipflex number, capacity and usage pricing.
PJSIP registration
Register using your Sipflex phone number and trunk password. A practical default for most Asterisk systems.
PJSIP guideIP peering
Authenticate using primary and optional failover IP addresses without registration credentials.
Peering guideIAX2
Use a single signalling and media protocol designed for Asterisk, including simpler NAT traversal.
IAX2 guideCONFIGURATION, NOT MYSTERY
Exact settings and copyable examples.
Our Asterisk documentation covers transport, codecs, authentication, inbound routing, caller ID, DTMF and common provider-side checks.
- PJSIP endpoint, auth, AOR and identify examples
- Registration and peering flows
- Codec and DTMF configuration
- Inbound DDI and outbound caller ID
- Asterisk CLI diagnostic commands
[sipflex]
type = endpoint
transport = transport-udp
context = from-sipflex
disallow = all
allow = alaw
dtmf_mode = rfc4733
; Credentials and registrar values
; are shown in your Sipflex portal.INTERACTIVE COOKBOOK
Generate a starting configuration.
Choose PJSIP registration, IP peering, legacy chan_sip or IAX2. Enter the connection details displayed in your Sipflex portal and copy the generated Asterisk files.
Open Asterisk cookbookNumbers and channels are separate. The account includes one complimentary channel; additional channels are £1/month. Inbound calls are free.
Build your price30-DAY FREE TRIAL
Connect Asterisk to Sipflex.
Choose registration, peering or IAX2 and start testing for 30 days.
No card required.