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Asterisk, PJSIP, and the dialplan
chan_pjsip is the SIP channel driver. res_pjsip reads pjsip.conf. extensions.conf is the dialplan. The license page is GPL version 2, with a stated exception for AMI, AGI, and ARI.
Learn in 5 minutes
- Name pjsip.conf and extensions.conf
- Name chan_pjsip and res_pjsip
- Repeat the license page without turning it into legal advice
Visual
This is not a working pjsip.conf. It is the split the configuration page describes.
Worked example
Which file A study sketch with the file names from the docs. It is not a working endpoint.
- Read the two file names.
- Say which one is the dialplan.
- Do not invent options that are not on the page.
Fault
A priority exten line is in pjsip.conf. The phone registers and the called extension does nothing.
The overview separates pjsip.conf from extensions.conf.
Quiz
Ecosystem
Glossary, sister systems, and the integration seam for this room.
Quality management and recording QM scores interactions. The standardized way an SBC forks a session to a recorder is SIPREC.
Sources and go deeper
- Asterisk res_pjsip configuration — last checked 2026-10
- A brief history of the Asterisk project — last checked 2026-10
- Asterisk license information — last checked 2026-10