Use PJSIP technology for res_pjsip provider trunks. MiRTA PBX maintains related ps_endpoints, ps_aors, ps_auths, and ps_endpoint_id_ips rows when realtime is enabled.
PJSIP realtime account settings with fictional res_pjsip trunk values.
Common Realtime Fields
Field
Applies to
Purpose
Fictional example
Use Realtime Account
SIP, PJSIP, IAX2
Creates and maintains the Asterisk realtime peer, endpoint, AOR, auth, or IAX row for the provider.
checked
Transport
SIP, PJSIP
SIP signaling transport. For PJSIP this maps to transport objects such as transport-udp, transport-tcp, or transport-tls.
UDP or TLS
RTP Encryption (SRTP)
SIP, PJSIP
Enables SRTP media encryption when supported by the provider. PJSIP stores this as media_encryption=sdes.
No for standard UDP SIP, Yes for TLS/SRTP trunks
Host
SIP, PJSIP, IAX2
Remote provider address. Use an IP address when inbound realtime matching must identify the carrier by source IP.
203.0.113.20
Port
SIP, PJSIP, IAX2
Remote signaling port. Defaults are commonly 5060 for SIP/PJSIP and 4569 for IAX2.
5060
Outbound Proxy
SIP, PJSIP
Proxy URI or host used for outbound signaling when required by the carrier.
sip-proxy.example.invalid
Username
SIP, PJSIP, IAX2
Authentication username sent to the provider. PJSIP stores this in ps_auths.username, chan_sip as defaultuser.
docs_sip_user
Password
SIP, PJSIP, IAX2
Authentication secret for the provider. Use a unique carrier-supplied or generated secret.
FictionalSecret-2026
Qualify
SIP, PJSIP
Enables SIP OPTIONS reachability checks and controls timeout behavior.
Yes
Qualify Frequency
SIP, PJSIP
Interval in seconds between provider reachability checks.
60 secs
Codecs
SIP, PJSIP, IAX2
Allowed audio codecs. MiRTA PBX stores disallow=all and the selected allow list.
alaw, ulaw, g722
Session Expires
SIP, PJSIP
Maximum SIP session refresh interval in seconds.
1800
DTMF Mode
SIP, PJSIP
DTMF signaling method. PJSIP maps RFC 2833 to rfc4733.
RFC 2833/RFC 4733
RTP Keepalive
SIP, PJSIP
Sends RTP keepalive packets to help keep NAT bindings and media paths active.
5 seconds
PJSIP-Specific Fields
Field
Applies to
Purpose
Fictional example
Transport
PJSIP only
Maps to the selected PJSIP transport object. Use TLS when the carrier requires encrypted signaling.
TLS
Host and Port
PJSIP only
Used to build the AOR contact and, when Host is an IP address, the endpoint identify match.
198.51.100.30:5061
Username and Password
PJSIP only
Stored in ps_auths. If username is empty, MiRTA PBX does not attach username/password auth.
docs_pjsip_user
Outbound Proxy
PJSIP only
PJSIP outbound proxy string for the endpoint.
sip:edge.example.invalid;transport=tls
Send RPID
PJSIP only
Maps to PJSIP send_rpid and send_pai.
PAI
Direct Media
PJSIP only
Allows PJSIP to attempt direct RTP. Disable when NAT, recording, transcoding, or media control requires Asterisk in the RTP path.
No
Allow Transfer
PJSIP only
PJSIP allow_transfer. When enabled, the endpoint may request SIP REFER transfers.
No
RTP Encryption (SRTP)
PJSIP only
Stores media_encryption=sdes when enabled.
Yes
Qualify Frequency and Timeout
PJSIP only
Stored on the AOR as qualify_frequency and qualify_timeout.
60 secs
Fictional PJSIP Example
Name: Docs Telecom PJSIP Trunk
Peer Name: docs_telecom_pjsip
Technology: PJSIP
Transport: TLS
RTP Encryption: Yes
Host: 198.51.100.30
Port: 5061
Outbound Proxy: sip:edge.example.invalid;transport=tls
Send RPID: PAI
Direct Media: No
Allow Transfer: No
