The type of application that will handle calls bridged through the B2BUA. Possible values:
- `trenscrypter` Bridge different encryption types on both ends transparently.
- `sip-bridge` Bridge calls through an external SIP provider. (e.g. for PSTN gateways)

SIP uri on which the back-to-back user agent server is listening on.

Audio port to use for RTP and RTCP traffic. You can set a specific port or a range of ports.
Examples: 'audio-port=12345' or 'audio-port=1024-65535'

Video port to use for RTP and RTCP traffic. You can set a specific port or a range of ports.
Examples: 'video-port=12345' or 'video-port=1024-65535'

Value of User-Agent header. Use the following syntax: <name>[/<version>] where <version> can bet set to '{version}' that is a placeholder for the Flexisip version.

Directory where to store b2bua core local files
Default

The Flexisip proxy URI to which the B2bua server should send all its outgoing SIP requests.

Duration after which the B2BUA will terminate a call if no RTP packet is received from the other call participant. Unit: seconds.

Any call bridged through the B2BUA that has been running for longer than this amount of seconds will be terminated. 0 to disable and let calls run unbounded.

Turn off all audio codecs except this one. This will effectively force this codec on both ends of all bridged calls. (If either end does not support the codec set here, the call will fail to establish.) Setting this option will also turn on the media payload forwarding optimisation which improves the performance of the B2BUA.
Format: <codec>/<sample-rate>. Example: speex/8000

Same as 'audio-codec' but for video.
Format: <codec>. Example: H264

Make the B2BUA use a separate connection (port) for each (external) account it manages. This can be used to work around DoS protection and rate-limiting systems on external proxies.